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WO1993009466A1 - Polymeres optiques non lineaires - Google Patents

Polymeres optiques non lineaires Download PDF

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Publication number
WO1993009466A1
WO1993009466A1 PCT/GB1991/001910 GB9101910W WO9309466A1 WO 1993009466 A1 WO1993009466 A1 WO 1993009466A1 GB 9101910 W GB9101910 W GB 9101910W WO 9309466 A1 WO9309466 A1 WO 9309466A1
Authority
WO
WIPO (PCT)
Prior art keywords
nonlinear optical
group
optical polymer
acid
polymer according
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/GB1991/001910
Other languages
English (en)
Inventor
Nicholas Blagden
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to PCT/GB1991/001910 priority Critical patent/WO1993009466A1/fr
Publication of WO1993009466A1 publication Critical patent/WO1993009466A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/355—Non-linear optics characterised by the materials used
    • G02F1/361—Organic materials
    • G02F1/3615—Organic materials containing polymers
    • G02F1/3617—Organic materials containing polymers having the non-linear optical group in a side chain

Definitions

  • This invention relates to nonlinear optical polymers, which are materials that produce second harmonic generation (SHG) of optical wavelength electromagnetic radiation, in particular laser radiation.
  • Nonlinear optical materials have industrial applications in the field of optoelectronics, in particular as laser beam wavelength converters.
  • Various polymers have been proposed in the past for use as or within such materials, since they tend to impart high speed response characteristics and strong resistance to optical damage.
  • Nematic liquid crystalline materials orientated in the presence of an electric field represent one form in which polymers are used as nonlinear optical materials.
  • EP-02-44288-A describes an electric field-orientated polymer consisting of a polymeric backbone such as a polyacrylate, a polymethcrylate or polysiloxane having side groups exhibiting mesogenic properties and side groups exhibiting nonlinear optical response characteristics.
  • the SHG activity of nematic liquid crystal polymers tends to be too low for practical purposes.
  • a nonlinear optical polymer comprising an ionomer of a polymeric acid and an organic base, the base having the structure
  • A is an electron donor group and B is an electron acceptor group.
  • Polymers according to the present invention are found to possess high SHG activities, and because the base is ionically linked to a polymeric backbone the polymer as a whole possesses an intrinsically low vapour pressure.
  • the polymeric acid preferably comprises a polymeric carboxylic acid, and preferbly contains from 100 to 20,000 repeat units. More preferably, it comprises a polymer of an ethylenically-unsaturated carboxylic acid and most preferably it comprises polyacrylic acid, which is readily soluble over a wide range of molecular weights in appropriate solvents from which the present ionomers may be precipitated.
  • A preferably comprises an organic group containing from 1 to 20 carbon atoms and at least one primary or secondary amino group.
  • the group B is preferably selected from -N0 2 , -NO, -CN, and F * .
  • the system of delocalised n-electrons preferably comprises an optionally-substituted arylene group, and most preferably comprises an amido derivative of a phenylene group.
  • the material of the Example was screened for its SHG activity by the following technique. Powdered samples of the material were prepared and mounted on slides in front of a 1064 nm output, pulsed Nd:Yag laser. The laser beam was focused on the slide through a neutral density filter followed by a 30 mm focal length convex lens. SHG activity was assessed by viewing the intensity of the scattered light from the samples through protective goggles which stopped the 106-4 nm fundamental frequency but passed 32 nm frequency (green) radiation. The SHG activity of each sample was compared with that of an ungraded powder sample of urea, a material which is known to possess an SHG activity several orders of magnitude greater than KDP but which has very poor crystal growth characteristics and poor thermal stability. In all cases, the powdered samples of the material prepared in accordance with the Example exhibited SHG activities significantly greater than that exhibited by the powdered urea sample.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

Polymère optique non linéaire présentant une activité élevée de génération d'harmoniques de deuxième ordre et une pression de vapeur faible et constitué d'un ionomère d'un acide de polymère et d'une base organique. L'acide comprend de préférence un polymère d'un acide carboxylique éthyléniquement insaturé et est exemplifié par l'acide polyacrylique. La base comprend un groupe donneur d'électrons, notamment -NO2, lié à un groupe récepteur d'électrons, en particulier un groupe organique contenant un groupe amino primaire, par l'intermédiaire d'un système de n-électrons délocalisés tel qu'un groupe arylène substitué.
PCT/GB1991/001910 1991-10-31 1991-10-31 Polymeres optiques non lineaires Ceased WO1993009466A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/GB1991/001910 WO1993009466A1 (fr) 1991-10-31 1991-10-31 Polymeres optiques non lineaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1991/001910 WO1993009466A1 (fr) 1991-10-31 1991-10-31 Polymeres optiques non lineaires

Publications (1)

Publication Number Publication Date
WO1993009466A1 true WO1993009466A1 (fr) 1993-05-13

Family

ID=10689175

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/001910 Ceased WO1993009466A1 (fr) 1991-10-31 1991-10-31 Polymeres optiques non lineaires

Country Status (1)

Country Link
WO (1) WO1993009466A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057248A (en) * 1988-06-29 1991-10-15 Agency Of Industrial Science And Technology Method for production of polymeric nonlinear optical material
WO1991016657A1 (fr) * 1990-04-20 1991-10-31 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Dispositif optique non lineaire

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057248A (en) * 1988-06-29 1991-10-15 Agency Of Industrial Science And Technology Method for production of polymeric nonlinear optical material
WO1991016657A1 (fr) * 1990-04-20 1991-10-31 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Dispositif optique non lineaire

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF POLYMER SCIENCE, POLYMER CHEMISTRY EDITION. vol. 28, no. 1, 15 January 1990, NEW YORK US pages 1 - 13; D.R. ROBELLO: 'linear polymers for nonlinear optics. I. Polyacrylates bearing aminonitro-stilbene and azobenzene dyes' *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 302 (C-855)2 August 1991 *
WORLD PATENTS INDEX LATEST Week 8941, Derwent Publications Ltd., London, GB; AN 89-295895 *
WORLD PATENTS INDEX LATEST Week 9026, Derwent Publications Ltd., London, GB; AN 90-197478 *

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