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WO2013001675A1 - Composant de maintien de fibre optique et réceptacle optique - Google Patents

Composant de maintien de fibre optique et réceptacle optique Download PDF

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Publication number
WO2013001675A1
WO2013001675A1 PCT/JP2011/079361 JP2011079361W WO2013001675A1 WO 2013001675 A1 WO2013001675 A1 WO 2013001675A1 JP 2011079361 W JP2011079361 W JP 2011079361W WO 2013001675 A1 WO2013001675 A1 WO 2013001675A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
ferrule
sleeve
end side
fiber holding
Prior art date
Application number
PCT/JP2011/079361
Other languages
English (en)
Japanese (ja)
Inventor
俊之 松本
利幸 水越
小林　善宏
Original Assignee
京セラ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Publication of WO2013001675A1 publication Critical patent/WO2013001675A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3847—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces

Definitions

  • the present invention relates to an optical fiber holding part and an optical receptacle using the same.
  • An optical fiber holding part is known as a part for fixing an optical fiber.
  • Examples of the optical fiber holding component include an optical connector described in Patent Document 1.
  • the optical connector described in Patent Document 1 includes a ferrule into which an optical fiber is inserted from one end, and a cylindrical holder attached to one end of the ferrule.
  • the holder is provided so as to protect a portion of the optical fiber located outside the ferrule when a part of the optical fiber is inserted into the ferrule.
  • the optical connector is used by inserting a ferrule into the sleeve from the other end side.
  • Optical connectors are required to be miniaturized in order to improve mountability in network devices.
  • the outer diameter of the holder attached to protect the optical fiber is larger than the outer diameter of the ferrule. For this reason, even if it tries to insert a ferrule in a sleeve from the other end side, it can insert in a sleeve only to the area
  • An optical fiber holding component has a first portion located on one end side and an outer diameter adjacent to the other end side of the first portion, than the first portion.
  • a ferrule having a large second portion and having a through-hole formed between the one end and the other end, and having a cylindrical shape, the first portion of the ferrule being inserted therein.
  • a holder having a sleeve insertion region inserted into the sleeve together with the second portion of the ferrule and having an outer diameter equal to or smaller than the outer diameter of the second portion.
  • An optical receptacle includes the above-described optical fiber holding component, and a sleeve that is cylindrical and into which the sleeve insertion region of the second portion and the holder is inserted.
  • FIG. 1 is a sectional view showing an optical fiber holding component 10 according to an embodiment of the present invention.
  • an optical fiber holding component 10 according to an embodiment of the present invention includes a ferrule 1 and a holder 5 provided so as to surround one end side of the ferrule 1.
  • FIG. 5 is a sectional view showing an optical receptacle 100 using the optical fiber holding component 10 shown in FIG.
  • FIG. 5 shows an optical fiber 2 fixed to the ferrule 1 and a sleeve 7 into which the ferrule 1 is inserted.
  • FIG. 2 is a cross-sectional view in which the region A of the ferrule 1 shown in FIG. 1 is partially enlarged.
  • FIG. 3 is a perspective view of the ferrule 1 shown in FIG.
  • the ferrule 1 shown in FIGS. 1, 2 and 3 is a substantially cylindrical member.
  • the ferrule 1 has a through hole 11 into which the optical fiber 2 is inserted from one end side.
  • the ferrule 1 includes a first portion 13 located on one end side and a second portion 14 located on the other end side and adjacent to the first portion 13.
  • one end side is shown as X1
  • the other end side is shown as X2.
  • the outer diameter of the second portion 14 is larger than the outer diameter of the first portion 13.
  • One end side of the first portion 13 is inserted into the holder 5.
  • a chamfered portion 12 is provided on the outer peripheral portion on the other end side of the second portion.
  • the corner on the other end side of the ferrule 1 may hit the external device.
  • the ferrule 1 can be smoothly inserted into an external device.
  • the outer peripheral surface of the first portion 13 and the end surface on the one end side of the second portion 14 are continuous via the corner portion 15.
  • the corner 15 is formed at a right angle.
  • connects the sleeve 7 among the outer peripheral surfaces of the 2nd part 14 can be enlarged compared with the case where the corner
  • the concentricity between the sleeve 7 and the ferrule 1 can be increased.
  • region 51 among the outer peripheral surfaces of a 1st part can be enlarged.
  • the ferrule 1 and the holder 5 can be firmly fixed.
  • the corner 15 may be formed in a curved surface shape so that the outer periphery of the first portion 13 and the end surface on the one end side of the second portion 14 are smoothly continuous. Thereby, when external force is added to the optical fiber holding component 10, it is possible to suppress the possibility of force concentrating on the corner 15.
  • angular part 15 can set a curvature radius to 0.1 mm or more and 0.5 mm or less, for example.
  • the outer peripheral surface of the first portion 13 has a larger surface roughness than the outer peripheral surface of the second portion 14.
  • the arithmetic average roughness Ra of the outer peripheral surface of the first portion 13 can be set to 0.02 mm or more and 0.2 mm or less, for example. By setting the arithmetic average roughness Ra to 0.02 mm or more, the first portion 13 and the holder 5 can be firmly fixed.
  • the arithmetic surface roughness Ra of the outer peripheral surface of the second portion 14 can be set to 0.001 mm or more and 0.01 mm or less, for example.
  • the second portion 14 is preferably formed longer than the first portion 13.
  • the contact area between the second portion 14 and the sleeve 7 can be increased.
  • region which is not in contact with the 2nd part 14 among the sleeves 7 can be reduced by forming the 1st part 14 short. Therefore, the concentricity between the sleeve 7 and the ferrule 1 can be increased.
  • the ferrule 1 As the optical fiber 2 fixed to the ferrule 1, an optical fiber having an outer diameter of 125 ⁇ m defined by the JIS standard or the TIA / EIA standard is used.
  • the ferrule 1 has, for example, an outer diameter of the second portion 14 of 1 mm to 3 mm, a length of 4 mm to 8 mm, and an outer diameter of the first portion 13 of 0.8 mm or more.
  • the length is set to 2.4 mm or less and the length is set to 2 mm or more and 4 mm or less.
  • the material of the ferrule 1 for example, ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used. A material of these ceramics or a material containing these ceramics as a main component can be used as the ferrule 1 material.
  • glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as the material of the ferrule 1 instead of the above ceramics.
  • the through-hole 11 is provided so as to penetrate the main body of the ferrule 1 along the central axis and open at one end and the other end.
  • the through hole 11 is provided for fixing the optical fiber 2.
  • the through-hole 11 can be broadly divided into an optical fiber introduction part 3 located on one end side of the ferrule 1 and an optical fiber holding part 4 located on the other end side of the ferrule 1.
  • the optical fiber introducing portion 3 is formed in the first portion 13, and the optical fiber holding portion 4 is continuously formed from the first portion 13 to the second portion 14.
  • the optical fiber introduction part 3 is a part that functions as a guide when the optical fiber 2 is inserted into the optical fiber holding part 4.
  • the optical fiber introducing portion 3 is formed on one end side of the ferrule 1.
  • the optical fiber introducing portion 3 has an inner diameter that decreases from one end side of the ferrule 1 toward the other end side.
  • the optical fiber introducing portion 3 includes a first taper portion 31 formed on one end side of the ferrule 1, an intermediate portion 32 formed continuously on the other end side of the first taper portion 31, and an intermediate portion 32. It has the 2nd taper part 33 formed continuously in the other end side.
  • the first taper portion 31 is a portion where the optical fiber 2 is inserted first, and opens at one end of the ferrule 1.
  • the first taper portion 31 is a portion for roughly positioning the insertion position of the optical fiber 2. Further, it is also a part filled with an adhesive 6 for fixing the optical fiber 2 and the ferrule 1 after the optical fiber 2 is inserted.
  • the first taper portion 31 has an inner peripheral surface that is inclined with respect to the through direction of the through hole 11 when viewed in a cross section in a cross section parallel to the through direction of the through hole 11.
  • the ferrule 1 has an inner peripheral surface whose inner diameter becomes smaller from one end side toward the other end side. Therefore, since the first taper portion 31 functions as a guide, the optical fiber 2 can be moved along the first taper portion 31. As a result, the optical fiber 2 can be easily inserted into the intermediate portion 32.
  • the shape of the inner peripheral surface when viewed in cross section is a linear shape except for the end portion on one end side.
  • the end part of the one end side among the 1st taper parts 31 is chamfered.
  • the angle a (hereinafter referred to as the first angle a) formed by the extension lines of these two straight lines may be set to, for example, about 60 ° to 120 °.
  • the first angle a is 60 ° or more, a sufficient space can be secured between the surface of the first taper portion 31 and the optical fiber 2. Therefore, after inserting the optical fiber 2 into the through hole 11, the space can be filled with the adhesive 6 stably. Therefore, the bonding strength between the optical fiber 2 and the ferrule 1 can be increased.
  • the first taper portion 31 can function stably as a guide. Therefore, the tip of the optical fiber 2 can be easily moved along the first tapered portion 31, so that the optical fiber 2 can be stably inserted into the intermediate portion 32.
  • the dimensions of the first taper portion 31 are, for example, that the inner diameter of one end side of the first taper portion 31, that is, the opening surface of one end of the ferrule 1 is 0.5 mm or more and 1.5 mm or less.
  • the inner diameter of the end part on the end side is set to 127 ⁇ m or more and 132 ⁇ m or less, and the length of the first taper part 31 is set to 0.3 mm or more and 0.9 mm or less.
  • the intermediate part 32 is located between the first taper part 31 and the second taper part 33.
  • the inner diameter of the intermediate part 32 is constant. Note that “the inner diameter is constant” means that the variation of the manufacturing error caused when the ferrule 1 is manufactured can be ignored.
  • the arithmetic average roughness Ra of the inner peripheral surface of the intermediate portion 32 is, for example, 0.05 ⁇ m or less. When the arithmetic average roughness Ra on the inner peripheral surface of the intermediate portion 32 is 0.05 ⁇ m or less, damage to the optical fiber 2 when the optical fiber 2 is inserted can be suppressed.
  • the inner diameter of the end portion on the other end side of the first taper portion 31 is set equal to the inner diameter of the intermediate portion 32.
  • the inner diameter at the end portion on the one end side of the second tapered portion 33 is set equal to the inner diameter of the intermediate portion 32. Note that “the inner diameters are the same” means that a variation in manufacturing error that occurs when the ferrule 1 is manufactured can be ignored.
  • the intermediate part 32 is a part for adjusting the insertion direction of the optical fiber 2 positioned roughly in the first taper part 31 to the penetration direction of the through hole 11. Specifically, even when the optical fiber 2 is bent when the optical fiber 2 is inserted into the first tapered portion 31, the optical fiber 2 itself passes through the intermediate portion 32 having a constant inner diameter. Can be corrected. Thereby, when inserting the optical fiber 2 in the 2nd taper part 33, it can suppress applying force in the direction shifted
  • the intermediate portion 32 is formed longer than the first taper portion 31.
  • the optical fiber 2 can be moved between the first tapered portion 31 and the second tapered portion 33 having a smaller inner diameter than the inner diameter of the intermediate portion 32.
  • the insertion direction can be adjusted. As a result, when the optical fiber 2 is inserted into the second taper portion 33, it is possible to suppress applying a force in a wrong direction to the tip of the optical fiber 2.
  • the dimensions of the intermediate part 32 are, for example, that the inner diameter of the intermediate part 32 is 127 ⁇ m or more and 132 ⁇ m or less, and the length of the intermediate part 32 is 0.6 mm or more and 1.8 mm, similarly to the end of the first taper part 31.
  • the second taper part 33 is a part for finely positioning the optical fiber 2 whose insertion direction is adjusted by passing through the intermediate part 32.
  • the second taper portion 33 has an inner peripheral surface that is inclined with respect to the through direction of the through hole 11 when viewed in a cross section along a plane parallel to the through direction of the through hole 11.
  • the inner peripheral surface of the second taper portion 33 is continuously provided on the other end side in the intermediate portion 32, and formed so that the inner diameter becomes smaller from one end side toward the other end side. Has been. Thereby, the optical fiber 2 can be inserted into the optical fiber holding part 4 using the second taper part 33 as a guide.
  • the second taper portion 33 is formed shorter than the first taper portion 31. This is because the optical fiber 2 passing through the second taper portion 33 is roughly positioned at the first taper portion 31 and is adjusted in the insertion direction at the intermediate portion 32. This is because the optical fiber 2 can be appropriately inserted into the optical fiber holding portion 4 even if the length 33 is short.
  • the shape of the inner peripheral surface when viewed in cross section is a linear shape.
  • the angle b (hereinafter referred to as the second angle b) formed by the extension lines of the two straight lines may be set to about 0.1 ° to 30 °.
  • the second angle b is 0.1 ° or more, the first taper portion 31 can function stably as a guide.
  • it is 30 degrees or less, it is suppressed that an edge arises between the optical fiber holding
  • the second angle b is set smaller than the first angle a.
  • the second tapered portion 33 can align the optical fiber 2 more accurately than the first tapered portion 31.
  • the dimension of the second taper portion 33 is, for example, that the inner diameter of the end portion on one end side of the second taper portion 33 is 127 ⁇ m or more and 132 ⁇ m or less like the intermediate portion 32, and the end portion on the other end side of the second taper portion 33.
  • the inner diameter is set to 125.5 ⁇ m to 127 ⁇ m, and the length of the second tapered portion 33 is set to 0.001 mm to 1 mm.
  • the optical fiber holding part 4 is a part for holding the optical fiber 2 inserted from the optical fiber introducing part 3.
  • the inner peripheral surface of the optical fiber holding portion 4 is provided continuously to the other end side of the second taper portion 33 and opens to the other end side of the ferrule 1.
  • the inner diameter of the optical fiber holding part 4 is constant. Note that “the inner diameter is constant” means that the variation of the manufacturing error caused when the ferrule 1 is manufactured can be ignored.
  • the arithmetic average roughness Ra of the inner peripheral surface of the optical fiber holding portion 4 is, for example, 0.05 ⁇ m or less.
  • the inner diameter of the optical fiber holding portion 4 can be set to 125.5 ⁇ m or more and 127 ⁇ m or less, for example, similarly to the inner diameter on the other end side of the second taper portion 33.
  • the optical fiber 2 when the optical fiber 2 is inserted, first, the optical fiber 2 is roughly positioned at the first taper portion 31. Next, the insertion direction of the optical fiber 2 is adjusted at the intermediate portion 32. Thereafter, it is inserted into the second taper portion 33. Therefore, when inserting the optical fiber 2 in the 2nd taper part 33, it can suppress that force is added to the direction shifted
  • a molding material constituting a molded body that is a prototype of the ferrule 1 is produced. Specifically, after sufficiently mixing and pulverizing zirconium oxide particles and yttrium oxide particles using a ball mill, a binder is added to these mixed powders, and the above mixed powder and binder are further mixed. . Thereby, a molding material is prepared.
  • the mixed powder is preferably obtained by mixing 1 to 15% by mass of yttrium oxide with 85 to 99% by mass of zirconium oxide. In particular, a mixture of 90 to 98% by mass of zirconium oxide powder and 2 to 10% by mass of yttrium oxide powder is more preferable.
  • the zirconium oxide particles preferably have a zirconium oxide purity of 95% or more, and more preferably 98% or more.
  • a molded body having the through holes 11 is produced using the prepared molding material.
  • a molding material is filled into a mold having a structure for molding the through hole 11.
  • a convex portion corresponding to the through hole 11 can be cited. That is, a mold having a concave cavity and a convex portion corresponding to the through hole 11 is used.
  • a compact is produced by performing press molding on the filled molding material at a predetermined pressure.
  • the method for producing the molded body is not limited to the press molding described above, and a method such as injection molding, casting molding, hydrostatic molding or extrusion molding may be employed.
  • the obtained compact is fired to produce a sintered body.
  • the degreased molded body is 0.5 at 1300 to 1500 ° C. in an oxygen atmosphere.
  • a sintered body is prepared by firing for 3 hours.
  • the first taper portion 31, the intermediate portion 32, and the second taper portion 33 are formed by subjecting the inner peripheral surface of the through hole 11 of the sintered body to a polishing process or the like. Specifically, the first taper portion 31, the intermediate portion 32, and the second taper portion 33 are moved by pressing a grindstone or a wire against the through-hole 11 while the ferrule 1 is rotated about the through-hole 11 as a rotation axis. Form. At this time, it is preferable to use grinding oil. Thereby, it can grind
  • the outer peripheral surface of the region corresponding to the first portion 13 of the sintered body is also polished. A region where the polishing process is performed becomes the first portion 13, and a region where the polishing process is not performed becomes the second portion 14.
  • the ferrule 1 can be manufactured as described above.
  • the holder 5 is a substantially cylindrical member.
  • the holder 5 is provided so as to surround one end side of the first portion 13.
  • the first part is fixed by being press-fitted into the holder 5.
  • the holder 5 is provided to protect a portion of the optical fiber 2 located outside the ferrule 1 when the optical fiber 2 is inserted into the ferrule 1.
  • the optical fiber 2 and the covering member 21 are protected by the holder 5.
  • the holder 5 has a main region 53 and a sleeve insertion region 51 provided on the other end side of the main region 53.
  • the sleeve insertion region 51 is a region that is inserted into the sleeve 7 when the ferrule 1 is inserted into the sleeve 7.
  • the sleeve insertion region 51 has a cylindrical shape, and the inner diameter is equal to the outer diameter of the first portion 13.
  • the first portion 13 of the ferrule 1 is inserted into the sleeve insertion area 51.
  • the outer diameter of the sleeve insertion region 51 is equal to or smaller than the outer diameter of the second portion 14. For this reason, when the ferrule 1 is inserted into the sleeve 7, the sleeve insertion region 51 can be simultaneously inserted into the sleeve 7. Thereby, in order to insert the ferrule 1 to the back of the sleeve 7, the necessity to lengthen the full length of the ferrule 1 falls. As a result, the optical fiber holding component 10 can be reduced in size.
  • the concentricity between the sleeve 7 and the optical fiber holding component 10 can be increased. This is because when the optical fiber holding component 10 is inserted into the sleeve 7, not only the second portion 14 but also the sleeve insertion region 51 is held by the sleeve 7.
  • the outer diameter of the sleeve insertion region 51 is smaller than the outer diameter of the second portion 14, the possibility that the sleeve insertion region 51 contacts the sleeve 7 when the optical fiber holding component 10 is inserted into the sleeve 7 is reduced. it can. As a result, the possibility that shavings may be generated on the surface of the sleeve insertion region 51 due to friction between the sleeve insertion region 51 and the sleeve 7 can be reduced. For this reason, when the optical fiber holding component 10 is used, the above-mentioned shaving residue moves to the end face of the ferrule 1, thereby reducing the possibility of improving the connection loss with other optical devices.
  • the main region 53 has a substantially cylindrical shape and is adjacent to one end side of the sleeve insertion region 51.
  • the inner diameter on the other end side is equal to the inner diameter of the first portion 13, and the inner diameter on one end side is smaller than the inner diameter of the first portion 13.
  • the main region 53 has a step 54 in which the inner diameter on the other end side is larger than the inner diameter on the one end side.
  • the first portion 13 is inserted not only into the sleeve insertion region 51 but also into the main region 53. Thereby, the area
  • the main region 53 has a so-called flange-shaped extending portion 52 in which a part of the outer peripheral portion extends outward.
  • the extending portion 52 is provided in a region of the main region 53 where the first portion 13 of the ferrule 1 is press-fitted, that is, a region on the other end side of the step 54.
  • a metal material such as stainless steel, or a resin material such as liquid crystal polymer, PES, or PEI can be used.
  • a metal material is used.
  • the optical fiber holding component 10 can be welded to an external device.
  • a metal material having a smaller thermal expansion coefficient than the resin material the holding force by press-fitting between the holder 5 and the ferrule 1 can be maintained well even under a thermal cycle.
  • the dimensions of the sleeve insertion region 51 are set to, for example, an outer diameter of 0.9 mm to 2.9 mm and an inner diameter of 0.6 mm to 2.4 mm.
  • the thickness of the sleeve insertion region can be set to 0.1 mm or more and 0.5 mm or less.
  • the outer diameter can be set to 1.2 mm to 4.0 mm, and the inner diameter can be set to 1 mm to 3 mm.
  • the thickness of the sleeve insertion region 51 is preferably set to 0.1 mm or more and 0.5 mm or less. Good.
  • the outer diameter of the first portion 13 of the ferrule 1 can be set to be larger than at least 1.5 mm, the strength of the ferrule 1 with respect to the external force can be ensured satisfactorily.
  • the thickness of the sleeve insertion region 51 is larger than 0.1 mm, it is possible to ensure a good holding force by press-fitting between the sleeve insertion region 51 and the first portion 13.
  • a gap is formed between the sleeve insertion region 51 and the second portion 14, but is not limited thereto.
  • the outer diameter of the sleeve insertion region 51 is constant, but is not limited thereto. Specifically, as long as the outer diameter of the second portion 14 is smaller, the outer diameter may be continuously changed.
  • the cross-sectional shape of the inner peripheral surface of the first tapered portion 31 of the ferrule 1 is two linear shapes, but is not limited thereto.
  • the first angle a of the first taper portion 31 may change in the middle of the first taper portion 31 as shown in a partially enlarged cross-sectional view similar to FIG.
  • the first taper portion 31 is located on the one end side, the first region 31 a having an angle aa corresponding to the first angle a, and the other end side.
  • a second region 31b having an angle ab corresponding to the first angle a.
  • the angle aa is larger than the angle ab.
  • the optical fiber 2 is easily inserted more smoothly.
  • an R surface is provided between the second tapered portion 33 and the optical fiber holding portion 4.
  • the optical fiber 2 can be more smoothly inserted from the second taper portion 33 to the optical fiber holding portion 4.
  • the radius of curvature can be set to 0.001 mm or more and 5 mm or less.
  • the ferrule 1 has the intermediate portion 32, but is not limited thereto. Specifically, the ferrule 1 does not have the intermediate part 32, and the first taper part 31 and the second taper part 33 may be adjacent to each other.
  • the inner diameter on one end side of the main region 53 is larger than the diameter of the first tapered portion 31 on the end face on one end side of the ferrule 1, but is not limited thereto.
  • the inner diameter on one end side of the main region 53 may be the same value as the diameter of the first tapered portion 31 on the end face on one end side of the ferrule 1. In this case, the strength against the external force of the holder 5 is improved, and the introduction of the optical fiber by the first tapered portion 31 is performed smoothly.
  • an optical receptacle 100 includes an optical fiber holding component 10, a sleeve 7 in which a ferrule 1 is inserted, and a sleeve 7 while leaving a gap with the sleeve 7. And a case 8 provided so as to surround it.
  • the sleeve 7 is provided for inserting a plug ferrule (not shown).
  • the optical receptacle 100 has a function of holding a plug ferrule (not shown) while aligning the optical axis of the inserted plug ferrule and the optical axis of the optical fiber 2 inside the optical receptacle 100.
  • An optical fiber 2 is inserted into the ferrule 1 in the optical receptacle 100 shown in FIG.
  • This optical fiber 2 is an optical fiber 2 having an outer diameter of 125 ⁇ m as defined by the JIS standard or the TIA / EIA standard.
  • the optical fiber 2 is inserted into the through hole 11 of the ferrule 1 from one end side and into the opening on the other end side. Exposed.
  • the end face on the other end side is arranged on the same plane as the end face on the other end side of the ferrule 1.
  • the optical fiber 2 is drawn out from the end of one end side of the ferrule 1.
  • the optical fiber 2 is fixed to the ferrule 1 or the holder 5 by filling the adhesive 6 between the first taper portion 31 and the inner peripheral surface of the holder 5 and the surface of the covering member 21.
  • a portion of the optical fiber 2 located outside the through hole 11 is covered with a covering member 21.
  • a covering member 21 for example, a silicone resin, a nylon resin, an acrylic resin, or the like is used.
  • the sleeve 7 is a substantially cylindrical member having a slit (not shown).
  • the other end of the ferrule 1 is inserted and fixed to one end of the sleeve 7.
  • the sleeve 7 is provided apart from the case 8.
  • the other end of the sleeve 7 is provided in contact with the holder 5.
  • the sleeve 7 has a hollow portion on the other end side when the ferrule 1 is inserted and fixed. A plug ferrule is inserted into the hollow portion from the other end side.
  • the sleeve 7 has slits (not shown) that are formed from one end portion to the other end portion and open to the inner peripheral surface and the outer peripheral surface of the sleeve 7. Since the sleeve 7 has such a slit (not shown), when the plug ferrule is inserted and fixed, the sleeve 7 can be deformed to expand the inner diameter. Thereby, insertion of a plug ferrule can be performed easily.
  • the width of the slit is set to 0.2 mm or more and 0.4 mm or less.
  • the sleeve 7 and the holder 5 are provided apart from each other, but the present invention is not limited to this. Specifically, if the outer diameter of the sleeve insertion region 51 of the holder 5 is formed to be equal to that of the second portion 14, not only the second portion 14 but also the sleeve insertion region 51 is held by the sleeve 7. It will be. Thereby, the concentricity between the sleeve 7 and the optical fiber holding component 10 can be increased.
  • the sleeve 7 is configured to abut against the end face of the extending portion 52, the sleeve 7 can be easily positioned.
  • ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1.
  • zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1.
  • the above ceramics alone or those containing these ceramics as a main component can be used.
  • glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as the material of the sleeve 7.
  • zirconia ceramics excellent in environmental resistance and toughness.
  • the sleeve 7 is provided with the slit, the sleeve 7 can be elastically deformed appropriately when the plug ferrule is inserted. Therefore, the plug ferrule is easily held.
  • the inner diameter of the sleeve 7 before the ferrule 1 and the plug ferrule are inserted is set to 1.2 mm.
  • the sleeve 7 When the ferrule 1 and the plug ferrule are inserted into the sleeve 7, the sleeve 7 is deformed to have an inner diameter of 1.25 mm, so that the ferrule 1 and the plug ferrule can be securely held by the sleeve 7.
  • the sleeve 7 is provided with a slit, but a so-called precision sleeve without a slit may be used.
  • the plug ferrule is a columnar member having a through hole 11 penetrating from one end to the other end.
  • An optical fiber is inserted into the through hole 11 of the plug ferrule over the entire length of the plug ferrule.
  • ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1 and the sleeve 7.
  • zirconium oxide zirconia
  • aluminum oxide alumina
  • mullite mullite
  • silicon nitride silicon carbide
  • aluminum nitride silicon carbide
  • aluminum nitride aluminum nitride
  • the above ceramics alone or those containing these ceramics as the main component can be used as the material for the plug ferrule.
  • glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as a material for the plug ferrule instead of the above ceramics.
  • zirconia ceramics excellent in environmental resistance and toughness.
  • the case 8 is a substantially cylindrical member and is provided so as to surround the ferrule 1. At this time, the case 8 is provided to protect the tip of the ferrule 1 on the other end side and the sleeve 7 into which the ferrule 1 is inserted so as not to contact the outside.
  • One end of the case 8 is press-fitted into the holder 5, and surrounds the ferrule 1 so that a gap exists between the case 8 and the ferrule 1.
  • the size of the gap is set to, for example, 0.15 mm or more and 0.3 mm or less.
  • a metal material such as stainless steel can be used.
  • the holder 5 has the sleeve insertion region 51 whose outer diameter is smaller than the outer diameter of the second portion on the other end side. Therefore, the holder 5 in which the first part 13 of the ferrule 1 is inserted can be inserted into the sleeve 7 together with the second part 14 of the ferrule 1 up to the sleeve insertion region 51. That is, in the ferrule 1, not only the second portion 14 but also the first portion 13 inserted in the sleeve insertion region 51 of the holder 5 can be inserted into the sleeve 7. Thus, the ferrule 1 can be inserted deeper into the sleeve 7 without increasing the overall length of the ferrule 1. As a result, the optical receptacle 100 can be reduced in size.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

La présente invention concerne, dans un modes de réalisation, un composant de maintien de fibre optique comportant : une virole qui comprend une première partie positionnée sur un côté d'extrémité et une deuxième partie positionnée au voisinage de l'autre côté d'extrémité de la première partie, la deuxième partie étant d'un diamètre extérieur supérieur à celui de la première partie, et qui comporte un trou débouchant formé entre une extrémité et l'autre extrémité de telle façon qu'une fibre optique soit insérée à partir d'un côté d'extrémité du trou débouchant, tandis que la deuxième partie est insérée dans une douille et fixée dans celle-ci ; et un support comportant une région d'insertion de douille réalisée sous forme tubulaire, dans laquelle la première partie de la virole est insérée et fixée, la région d'insertion de douille présentant un diamètre extérieur inférieur à celui de la deuxième partie de la virole et étant insérée dans la douille conjointement avec la deuxième partie.
PCT/JP2011/079361 2011-06-30 2011-12-19 Composant de maintien de fibre optique et réceptacle optique WO2013001675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011146129 2011-06-30
JP2011-146129 2011-06-30

Publications (1)

Publication Number Publication Date
WO2013001675A1 true WO2013001675A1 (fr) 2013-01-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10345534B2 (en) * 2016-05-20 2019-07-09 Toto Ltd. Pigtail-type optical receptacle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61170709A (ja) * 1985-01-25 1986-08-01 Nippon Telegr & Teleph Corp <Ntt> 光フアイバコネクタ
JP2003185881A (ja) * 2001-10-12 2003-07-03 Seiko Instruments Inc フェルール
JP2005084138A (ja) * 2003-09-04 2005-03-31 Fujikura Ltd 光コネクタ
JP2007322600A (ja) * 2006-05-31 2007-12-13 Sanwa Denki Kogyo Co Ltd 光コネクタの光ファイバ固定機構
JP2008304731A (ja) * 2007-06-08 2008-12-18 Ntt Advanced Technology Corp 光通信用フェルール及び光コネクタ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61170709A (ja) * 1985-01-25 1986-08-01 Nippon Telegr & Teleph Corp <Ntt> 光フアイバコネクタ
JP2003185881A (ja) * 2001-10-12 2003-07-03 Seiko Instruments Inc フェルール
JP2005084138A (ja) * 2003-09-04 2005-03-31 Fujikura Ltd 光コネクタ
JP2007322600A (ja) * 2006-05-31 2007-12-13 Sanwa Denki Kogyo Co Ltd 光コネクタの光ファイバ固定機構
JP2008304731A (ja) * 2007-06-08 2008-12-18 Ntt Advanced Technology Corp 光通信用フェルール及び光コネクタ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10345534B2 (en) * 2016-05-20 2019-07-09 Toto Ltd. Pigtail-type optical receptacle

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