Non-linear optically active polycarbonate

Details Non-linear optically active polycarbonate Non-linear optically active polycarbonate

1996-02-21

1997-11-18

Mosley, Terressa

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

385145, 428 1, 525461, 525462, 525463, 525464, 525465, 525467, 525468, 528196, 528198, 528199, 528201, C08G 6400

Patent

active

056888961

ABSTRACT:
The invention pertains to a non-linear optically active (NLO) side chain polycarbonate and to NLO active waveguides containing said polycarbonate. Waveguides containing this NLO polycarbonate have a low loss of signal. Polycarbonates based on bischloroformates of hexafluorobisphenol A, hexafluorotetrabromobisphenol A and bisphenol S or deuterated bisphenol A or sulphonylbiphenol are especially preferred within the framework of the invention: they were found to give an exceptionally low loss of signal. The invention further pertains to cross-linkable and already cross-linked polycarbonates. Especially preferred polycarbonates according to the invention are those where the diol comprises a rigid donor group. These polycarbonates have a high Tg, which renders them thermally stable.

REFERENCES:
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T. Hoekstra al., "Photoluminescence and Attenuation of Spray-Pyrolysis-Deposited Erbium-Doped Y.sub.2 O.sub.3 Planar Optical Waveguides", Optics Letters, vol. 17, No. 21 (1992), pp. 1506-1508.
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Derwent Patent Abstract 88-311005/44, abstracting JP 63/228,135 (Sep. 22, 1988).
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Comp. Poly. Sci.: The Synthesis, Characterization, Reactions and Applications of Polymers, vol. 5, Chapter 20, pp. 345-356.
Angew. Makromol. Chem. (1990), 183: pp. 251-252.

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