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WO2016002374A1 - Dispositif optique, et module optique - Google Patents

Dispositif optique, et module optique Download PDF

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Publication number
WO2016002374A1
WO2016002374A1 PCT/JP2015/064617 JP2015064617W WO2016002374A1 WO 2016002374 A1 WO2016002374 A1 WO 2016002374A1 JP 2015064617 W JP2015064617 W JP 2015064617W WO 2016002374 A1 WO2016002374 A1 WO 2016002374A1
Authority
WO
WIPO (PCT)
Prior art keywords
cladding
light
resin member
clad
optical device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2015/064617
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English (en)
Japanese (ja)
Inventor
真一 阪本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujikura Ltd
Original Assignee
Fujikura Ltd
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 Fujikura Ltd filed Critical Fujikura Ltd
Publication of WO2016002374A1 publication Critical patent/WO2016002374A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • 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
    • G02B6/255—Splicing of light guides, e.g. by fusion or bonding
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating

Definitions

  • the present invention relates to an optical device including an optical fiber and an optical module including such an optical device.
  • optical fibers In the fields of optical processing and optical communication, optical devices equipped with optical fibers are widely used.
  • the optical fiber includes a core, a clad surrounding the core, and a coating surrounding the clad, and light incident from one end face (hereinafter also referred to as “incident end face”) is transmitted to the other end face (hereinafter referred to as “exit”). The light is emitted from the “end face”.
  • the light propagating from the incident end face to the exit end face in the optical fiber is light having an incident angle smaller than the light receiving angle of the optical fiber among the light incident on the core at the incident end face.
  • Other light that is, light incident on the clad at the incident end face and light leaking from the core to the clad after entering the core at the incident end face (light whose incident angle is larger than the receiving angle of the optical fiber) Leaks from the cladding in the vicinity of the incident end face. Light leaked from the cladding in the vicinity of the incident end face is absorbed by the coating and converted into heat. This heat causes deterioration or burnout of the coating and reduces the reliability of the optical device.
  • Patent Document 1 describes a fusion splicing structure in which an output end face of a double clad fiber and an incident end face of a single clad fiber are fusion spliced.
  • the following configuration is adopted for a single clad fiber.
  • the outer surface of the clad exposed in the coating removal section is covered with a resin member, and the resin member is surrounded by an aluminum block.
  • the resin member covering the outer surface of the clad is made of a resin material having a refractive index higher than that of the clad. For this reason, light incident on the clad (light incident on the clad at the incident end face and light leaked from the core to the clad after entering the core at the incident end face) is transferred from the clad to the resin member in the coating removal section. And leak.
  • the light leaked from the clad to the resin member in the coating removal section is absorbed by the aluminum block and converted into heat. In this way, by heating the light incident on the clad within the coating removal section, the possibility of coating deterioration or burning outside the coating removal section decreases.
  • Japanese Published Patent Publication Japanese Patent Laid-Open No. 2008-310277 (Released on Dec. 25, 2008)
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide an optical fiber having a coating removal section in the vicinity of an incident end face, and an outer surface of the cladding of the optical fiber exposed in the coating removal section.
  • an optical device provided with a covering resin member there is a possibility of reducing the possibility of coating deterioration or burning, and reducing the possibility of deterioration of the resin member, thereby improving its reliability.
  • an optical device includes an optical fiber provided with a coating removal section in the vicinity of an incident end surface, and a resin that covers an outer surface of the cladding of the optical fiber exposed in the coating removal section.
  • the present invention it is possible to reduce the possibility of coating deterioration or burnout and the possibility of local deterioration or burnout of the resin member, thereby improving the reliability of the optical device.
  • FIG. 3 is a cross-sectional view showing a configuration of an LD module including optical devices according to first to third embodiments of the present invention.
  • FIG. 1 is a longitudinal sectional view showing a configuration of an optical device 1 according to the present embodiment.
  • the optical device 1 includes an optical fiber 10, a resin member 20, a transparent member 30, and a heat dissipation member 40.
  • the optical fiber 10 includes (1) a core 11, (2) a clad 12 having a lower refractive index than the core 11 surrounding the core 11, and (3) a coating (not shown) surrounding the clad 12.
  • a coating removal section from which the coating has been removed is provided in the vicinity of the incident end face 10a of the optical fiber 10.
  • FIG. 1 shows a coating removal section of the optical fiber 10.
  • Laser light having a wavelength ⁇ emitted from a light source such as an LD (Laser Diode) enters the optical fiber 10 through the incident end face 10a.
  • the incident end face 10a is polished and further AR (Anti-Reflective) coating is applied.
  • Part of the light incident on the optical fiber 10 through the incident end face 10 a is incident on the cladding 12.
  • light having an incident angle larger than the light receiving angle of the optical fiber 10 leaks from the core 11 to the cladding 12 in the vicinity of the incident end face 10a.
  • the coating heats up, leading to deterioration or burnout of the coating. For this reason, it is necessary to remove the light incident on the clad 12 at or near the incident end face 10a in the coating removal section.
  • the resin member 20 is a resin member having a refractive index lower than that of the cladding 12 and covering the outer surface of the cladding 12 exposed in the coating removal section.
  • an adhesive that bonds the clad 12 and the transparent member 30 is used as the resin member 20. Since the refractive index of the resin member 20 is lower than the refractive index of the cladding 12, the light incident on the cladding 12 propagates through the cladding 12 without leaking to the resin member 20 in the vicinity of the incident end face 10a.
  • a part of the light propagating through the clad 12 oozes out as evanescent light outside the outer surface of the clad 12 serving as a total reflection boundary.
  • the region where the evanescent light permeates from the clad 12 is a region where the distance from the outer surface of the clad 12 is equal to or less than the wavelength ⁇ of the light propagating through the clad 12.
  • the resin member 20 is surrounded by a transparent member 30 in which particulate scatterers 31 are embedded.
  • the refractive index of the transparent member 30 is higher than the refractive index of the resin member 20.
  • the material of the transparent member 30 is not particularly limited, but is desirably a material having a low absorptance at the wavelength ⁇ of light propagating through the cladding 12.
  • a resin ferrule in which a through hole for inserting the optical fiber 10 is formed is used as the transparent member 30.
  • the scatterer 31 is a particle having a refractive index different from that of the transparent member 30 scattered inside the transparent member 30.
  • the material of the scatterer 31 is not particularly limited, but a material having a low absorptance at the wavelength ⁇ propagating through the cladding 12 is desirable. Suitable materials for the scatterer 31 include quartz, silica, alumina, and the like. Further, bubbles may be used as the scatterer 31.
  • the thickness d1 of the resin member 20 is made thinner than the wavelength ⁇ of the light propagating through the cladding. Therefore, the scatterers 31 embedded in the transparent member 30 are scattered in a region where the distance from the outer surface of the clad 12 is equal to or less than the wavelength ⁇ of light propagating through the clad 12, that is, a region where evanescent light penetrates. become. As a result, the evanescent light that has oozed out of the outer surface of the cladding 12 is scattered by the scatterer 31 and, as a result, is converted into propagating light that travels away from the outer surface of the cladding 12 in a random direction. .
  • the heat dissipating member 40 is disposed so as to contact the transparent member 30, and converts the evanescent light scattered by the scatterer 31, that is, the propagating light propagating in a random direction away from the outer surface of the clad 12 into heat. To do.
  • the material of the heat radiating member 40 is desirably a material having high thermal conductivity, for example, a metal.
  • the optical device 1 configured as described above, leakage of light from the clad 12 is not caused intensively at the end portion on the incident side of the section where the clad 12 is covered with the resin member 20,
  • the resin member 20 can be generated in a distributed manner throughout the entire section covered with the transparent member 30. Therefore, it is possible to reduce not only the possibility of coating deterioration or burning outside the coating removal section, but also the possibility of local deterioration or burning of the resin member 20 within the coating removal section.
  • the optical device 1 includes a heat radiating member 40. Since the light incident on the heat radiating member 40 is scattered by the scatterer 31, the light does not concentrate on a part of the heat radiating member 40 and local heat is not generated. Thereby, the situation where the optical device 1 deteriorates due to local heat generation of the heat radiating member 40 can be prevented.
  • the present invention is not limited to this. That is, for example, a configuration in which light emitted from another optical fiber fusion-connected to the optical fiber 10 is incident on the optical fiber 10 may be employed.
  • the other optical fiber is a double clad fiber for amplification
  • the pumping light residual pumping light
  • the optical fiber 10 The light enters the clad 12. In this case, the residual excitation light can be gradually leaked in the coating removal section.
  • this invention is not limited to this.
  • the same effect as described above can be obtained. This is because grain boundaries are scattered inside the polycrystalline structure, and these grain boundaries function in the same manner as the particulate scatterers 31 embedded in the transparent member 30.
  • a zirconia ferrule is an example of such a polycrystalline structure.
  • FIG. 2 is a longitudinal sectional view showing the configuration of the optical device 1 according to this embodiment.
  • the same components as those in the above-described embodiment are denoted by the same member numbers, and the description thereof is omitted.
  • the thickness of the resin member 20 ' is different from that of the resin member 20 of the optical device 1 according to the first embodiment.
  • the resin member 20 ′ has a thickness d ⁇ b> 2 larger than the wavelength ⁇ of light propagating through the cladding 12 on the incident end face 10 a side of the optical fiber 10.
  • the thickness of the resin member 20 ′ decreases as it moves away from the incident end face 10 a of the optical fiber 10, and has a structure that converges to a specific thickness (thickness d 1 in FIG. 2) that is thinner than the wavelength ⁇ of light propagating through the cladding 12. ing.
  • the structure of the resin member 20 ′ is not limited to the structure shown in FIG. 2, and the thickness of at least a part of the section surrounded by the transparent member 30 is greater than the wavelength ⁇ of light propagating through the cladding 12. Should be thinner. In a section where the thickness of the resin member 20 ′ is thinner than the wavelength ⁇ of light propagating through the cladding 12, the scatterer 31 embedded in the transparent member 30 is light whose distance from the outer surface of the cladding 12 propagates through the cladding 12. Are scattered in a region where the wavelength ⁇ is equal to or less than the wavelength ⁇ , that is, a region where evanescent light oozes out.
  • the leakage of light from the clad 12 is not caused intensively at the incident side end of the section where the clad 12 is covered with the resin member 20 ′, but the resin.
  • the thickness of the member 20 ′ can be generated in a dispersive manner in the entire section where the thickness of the member 20 ′ is thinner than the wavelength ⁇ of light propagating through the cladding 12. Therefore, similarly to the optical device 1 according to the first embodiment, not only the deterioration or burning of the coating may occur outside the coating removal section, but also the local deterioration or burning of the resin member 20 ′ may occur within the coating removal section. The possibility of occurring can also be reduced.
  • the configuration in which the resin member 20 is surrounded by the transparent member 30 in which the particulate scatterers 31 are embedded may be replaced with a configuration in which the resin member 20 is surrounded by a polycrystalline structure. Good.
  • FIG. 3 is a longitudinal sectional view showing the configuration of the optical device 1 according to this embodiment.
  • the same components as those in the above-described embodiment are denoted by the same member numbers, and the description thereof is omitted.
  • the optical device 1 according to this embodiment is the first in that a scatterer 21 is embedded in a resin member 20 ′′ and a protective body 50 is provided instead of the transparent member 30. This is different from the optical device 1 according to the first embodiment.
  • the resin member 20 ′′ is a resin member that covers the outer surface of the cladding 12 exposed in the coating removal section.
  • the refractive index of the resin member 20 ′′ is lower than the refractive index of the cladding 12. Therefore, the light incident on the clad 12 propagates through the clad 12 without leaking to the resin member 20 ′′ in the vicinity of the incident end face 10a.
  • the thickness of the resin member 20 ′′ is the light propagating through the clad 12. It is not necessary to be thinner than the wavelength ⁇ .
  • the scatterer 21 is a particle having a refractive index different from that of the resin member 20 ′′ scattered inside the resin member 20 ′′.
  • the material of the scatterer 21 is not particularly limited, but a material having a low absorptance at the wavelength ⁇ propagating through the cladding 12 is desirable. Suitable materials for the scatterer 21 include quartz, silica, alumina and the like. In addition, bubbles may be used as the scatterer 21.
  • the scatterer 21 is embedded in the resin member 20 ′′ that covers the outer surface of the clad 12 exposed in the coating removal section.
  • the scatterers 21 embedded in the member 20 ′′ are scattered in a region where the distance from the outer surface of the clad 12 is equal to or less than the wavelength ⁇ of light propagating through the clad 12, that is, a region where evanescent light oozes out. .
  • the evanescent light that has oozed out of the outer surface of the clad 12 is scattered by the scatterer 21, and as a result, is converted into propagating light that leaves the outer surface of the clad 12 and propagates in a random direction. .
  • the protector 50 is a member for protecting the optical fiber 10 and is provided so as to surround the resin member 20 ′′.
  • the optical device 1 According to the optical device 1 according to the present embodiment, light leakage from the clad 12 is not caused in a concentrated manner at the incident side end of the section in which the clad 12 is covered with the resin member 20 ′′. 12 can be generated in a distributed manner throughout the entire section covered with the resin member 20 ′′. Therefore, similarly to the optical device 1 according to the above-described embodiment, not only the coating deterioration or burning may occur outside the coating removal section, but also the local deterioration or burning of the resin member 20 may occur within the coating removal section. The sex can also be reduced.
  • FIG. 4 is a cross-sectional view of the LD module 100.
  • the LD module 100 includes an optical device 1 according to the first embodiment, a housing 2, an LD (Laser Diode) mount 3, an LD (Laser Diode) 4, an electrode 5, and a conductor 6. , A lens mount 7, a lens 8, and a sleeve 60.
  • the sleeve 60 is a cylindrical member that houses the optical device 1.
  • the sleeve 60 is made of metal, (1) a cylindrical small-diameter portion 61, and (2) a central axis coincides with the small-diameter portion 61, and an inner diameter and an outer diameter are smaller than those of the small-diameter portion 61.
  • the section that is not covered with the resin member 20 and the transparent member 30 among the covering removal section of the optical device 1 is inserted into the small diameter portion 61 of the sleeve 60.
  • the inner diameter of the small diameter portion 61 is designed to be larger than the cladding diameter of the optical fiber 10.
  • the gap between the inner surface of the sleeve 60 and the outer surface of the optical fiber 10 is filled with an adhesive.
  • a section covered with the resin member 20 and the transparent member 30 among the covering removal section of the optical device 1 is inserted into the large diameter portion 62 of the sleeve 60.
  • the inner diameter of the large-diameter portion 62 is designed to substantially match the outer diameter of the transparent member 30.
  • the sleeve 60 also functions as the heat dissipation member 40 described above.
  • the housing 2 is a rectangular parallelepiped box-shaped housing composed of a bottom plate 2a, a front side wall 2b, a rear side wall 2c, a right side wall (not shown), a left side wall (not shown), and a top plate 2d.
  • the optical device 1 is inserted into the front side wall 2 b of the housing 2 via the sleeve 60 described above, and the front side wall 2 b also functions as the heat dissipation member 40 described above together with the sleeve 60.
  • the LD mount 3 is placed on the bottom plate 2 a of the housing 2, and the LD 4 is placed on the LD mount 3.
  • the LD 4 functions as a light source that outputs a laser beam L having a wavelength ⁇ .
  • a lens mount 7 is placed on the bottom plate 2 a of the housing 2, and a lens 8 is placed on the lens mount 7. The lens 8 focuses the laser light L output from the LD 4.
  • the optical device 1 is inserted into the front side wall 2 b of the housing 2 so that the incident end face 10 a of the optical fiber 10 faces the emission end face of the LD 4 through the lens 8.
  • the laser light L focused by the lens 8 is incident on both the core 11 and the clad 12 of the optical fiber 10.
  • the electrode 5 is inserted into the rear side wall 2 c of the housing 2, and the LD 4 is connected to the electrode 5 through the conductive wire 6. If the electrode 5 is connected to a current source outside the housing 2, current can be supplied to the LD 4.
  • the optical device that can be mounted on the LD module 100 is not limited to the optical device 1 according to the first embodiment. . That is, instead of the optical device 1 according to the first embodiment, for example, the optical device 1 according to the second embodiment or the optical device 1 according to the third embodiment can be mounted on the LD module.
  • the optical device is an optical fiber provided with a coating removal section in the vicinity of an incident end face, and a resin member that covers an outer surface of the cladding of the optical fiber exposed in the coating removal section.
  • the outer surface of the cladding exposed in the coating removal section is covered with the resin member having a refractive index lower than that of the cladding. For this reason, the light incident on the clad (light incident on the clad at the incident end face and light leaked from the core into the clad after being incident on the core of the optical fiber at the incident end face)
  • the clad propagates without leaking from the clad intensively at the incident side end of the section covered with the resin member.
  • the light propagating through the clad oozes out as evanescent light outside the outer surface of the clad that becomes a total reflection boundary.
  • the region where the evanescent light oozes from the cladding is a region where the distance from the outer surface of the cladding is equal to or less than the wavelength of light incident on the cladding in the region outside the outer surface of the cladding.
  • the scatterer may be a particle embedded in the resin member (see the third embodiment), or may be a particle embedded in a transparent member surrounding the resin member. It is also possible (see the first embodiment and the second embodiment). In the latter case, if the thickness of the resin member is made thinner than the wavelength of light incident on the clad in all or part of the section where the resin member is surrounded by the transparent member, the evanescent light is emitted from the clad.
  • the scatterers (particles) can be scattered in the area where the oozes out.
  • the scatterer may be a grain boundary of a polycrystalline structure surrounding the resin member.
  • the thickness of the resin member is made thinner than the wavelength of light incident on the clad in all or part of the section surrounded by the polycrystalline structure, the clad is evanescent from the clad.
  • the scatterers can be scattered in the region where light oozes out.
  • the optical device further includes a heat dissipation member that converts the light scattered by the scatterer into heat and dissipates it.
  • the light scattered by the scatterer can be efficiently heated and dissipated.
  • an optical module including the optical device and a light source that outputs light incident on the optical fiber is also included in the scope of the present invention.
  • the scatterers may be dispersed in a region where the distance from the outer surface of the cladding is equal to or less than the wavelength of the light output from the light source in a region outside the outer surface of the cladding. .
  • the present invention can be widely applied to optical devices having optical fibers that transmit laser light.
  • it is suitable for an optical device used in an optical module for communication or processing.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Lasers (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

L'invention porte sur un dispositif optique (1), qui comprend : une fibre optique ayant un cœur (11) et une gaine (12) qui entoure le cœur ; et un élément en résine (20) qui entoure la gaine, et qui a un indice de réfraction inférieur à celui de la gaine. Dans une région qui se trouve à l'extérieur de la gaine, et qui est telle que la distance à partir de la périphérie de la gaine n'est pas supérieure à la longueur d'onde de lumière se propageant à travers la gaine, des diffuseurs (21, 31) pour diffuser de la lumière sont dispersés. Grâce à cette configuration, le potentiel pour qu'un revêtement se détériore ou se calcine et le potentiel pour que l'élément en résine se détériore sont tous deux réduits, et la fiabilité est améliorée.
PCT/JP2015/064617 2014-07-01 2015-05-21 Dispositif optique, et module optique Ceased WO2016002374A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-136225 2014-07-01
JP2014136225A JP5848803B1 (ja) 2014-07-01 2014-07-01 光デバイス、及び、光モジュール

Publications (1)

Publication Number Publication Date
WO2016002374A1 true WO2016002374A1 (fr) 2016-01-07

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WO (1) WO2016002374A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6718283B2 (ja) * 2016-04-01 2020-07-08 株式会社フジクラ 光ファイバ接続体
CN106772787B (zh) * 2017-02-08 2019-04-05 中科先为激光科技（北京）有限公司 用于滤除包层光的光纤及应用其的包层光滤除器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0162509U (fr) * 1987-10-16 1989-04-21
JPH0961669A (ja) * 1995-08-23 1997-03-07 Miyachi Technos Corp 光ファイバコネクタ
JP2008310277A (ja) * 2007-05-15 2008-12-25 Fujikura Ltd 光ファイバ融着接続構造
WO2013096364A1 (fr) * 2011-12-19 2013-06-27 Ipg Photonics Corporation Système laser à fibre de grande puissance doté d'un absorbeur de mode distributif
JP2013257362A (ja) * 2012-06-11 2013-12-26 Fujikura Ltd レーザモジュール
JP2015132773A (ja) * 2014-01-15 2015-07-23 株式会社フジクラ 光デバイスおよびその製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0162509U (fr) * 1987-10-16 1989-04-21
JPH0961669A (ja) * 1995-08-23 1997-03-07 Miyachi Technos Corp 光ファイバコネクタ
JP2008310277A (ja) * 2007-05-15 2008-12-25 Fujikura Ltd 光ファイバ融着接続構造
WO2013096364A1 (fr) * 2011-12-19 2013-06-27 Ipg Photonics Corporation Système laser à fibre de grande puissance doté d'un absorbeur de mode distributif
JP2013257362A (ja) * 2012-06-11 2013-12-26 Fujikura Ltd レーザモジュール
JP2015132773A (ja) * 2014-01-15 2015-07-23 株式会社フジクラ 光デバイスおよびその製造方法

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JP5848803B1 (ja) 2016-01-27

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