The results of optical phase conjugation experiments in a degenerate four-wave mixing geometry are reported at 532 nm in a new block copolymer of phenylacetylene and norbornene. The copolymer sample with an equal number of repeating units for the two homopolymers prepared by sequential addition of the monomers gives a third-order susceptibility value which is twice that of the homopolymer of phenylacetylene. © 1995.

B. Gita

Govindarajan Sundararajan

Crosslinking

Four wave mixing

Geometrical optics

Monomers

Olefins

Optical materials

OPTICAL PHASE CONJUGATION

Ring opening polymerization

Homopolymers

Norbornene

phenylacetylene

Block copolymers

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

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IIT Madras

Degenerate four-wave mixing in the copolymer of phenylacetylene and norbornene

Optical Materials

Conjugated polymers with ferrocene units as pendants or as end-groups have been systhesised using the classical metathesis polymerisation catalyst W(CO)6 under photo-irradiation. The polymers are characterised by spectroscopic techniques and the redox-behaviour of these complexes have been examined by cyclic voltammetry. © 2002 Elsevier Science B.V. All rights reserved.

Journal of Organometalic Chemistry

Synthesis of conjugated polymers with ferrocene units as pendants or as end-groups

Tetrahedron Letters

Synthesis of homo and block copolymers of norbornene with W(CO)6 via photo-initiation

Optical phase conjugation by degenerate four-wave mixing in samples of pristine and iodine-doped polyphenylacetylene at ruby laser wavelength (694.3 nm) is reported here. The nonresonant values of the third-order optical susceptibility χ(3) are determined from the measurements of reflectivity of phase conjugate signals.

Fulltext

Journal of Applied Physics

Nonresonant third-order optical response of polyphenyl acetylene

The third-order nonlinear optical susceptibilityx(3) is measured in solutions of undoped and iodine-doped polyphenylacetylene by nanosecond degenerate four-wave mixing (DFWM). Phase conjugation in iodine-doped polyphenylacetylene is reported here for the first time. Polyphenylacetylene used in this work is polymerised with a group VI metal carbonyl as catalyst. Phase conjugate reflectivity is measured as a function of incident laser power, concentration and doping levels of iodine. Both undoped and iodine-doped polyphenylacetylene give good phase conjugate signals, with enhanced reflectivity in doped samples, at modest Q-switched laser power levels.x(3) for PPA in solution is found to be 1.1 x 10-20 m2/V2 and doping (22%) with iodine enhances it to 2 x 10- 18 m2/V2. © 1990.

Optics Communications

Degenerate four-wave mixing in solutions of pure and iodine-doped polyphenylacetylene

Journal of Polymer Science Part A: Polymer Chemistry

Issue Information - Editorial Board 2

Frontiers of Polymer Research

Third Order Nonlinear Optical Response of Pure and Doped Polyphenyl Acetylene: A Wavelength Dependence Study

Journal	Optical Materials
ISSN	09253467
Open Access	No