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Title
Elektrooptische und photonische Bauelemente
Date Issued
1998
Author(s)
Nordmann, J.
Beckmann, S.
Etzbach, K.H.
Sens, R.
Bauer, M.
Krueger, H.
Bauer, J.
Guenzelmann, C.
Hartmann, H.
Walter, A.
Flaig, R.
Patent No
1996-19639446
Abstract
In electro-optical and photonic devices with a functional layer of oriented, cross-linked non-linear optical (NLO) polymer between 2 buffer layers, the polymer is a polyadduct (I) containing a NLO grouping, derived from: (a) NLO active compound(s) (II) containing hydroxyl (OH) group(s) reacting with cyanate groups; and (b) organic di- or polycyanate(s) (III). Also claimed is a method of making the devices. USE - The devices are planar waveguides, the function of which can be changed by electric potential, used in non-linear optics and optical information technology, e.g. modulators, Mach-Zehnder modulators, tuneable and switchable couplers, (tuneable) wavelength filters and polarisation modifiers. ADVANTAGE - Relaxation and hence loss of NLO activity is a problem with most polymers that have the required high second order susceptibility, which makes them unsuitable for technical devices requiring long-term stability. Relaxation after orientation is avoided or inhibited in (I) and optic al losses are small. Usually, relaxation is avoided up to temperatures above 100 deg. C and (I) are stable at temperature above 200 deg. C. Very wide variation of the optical properties is possible.
Language
de
Patenprio
DE 1996-19639446 A: 19960925