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Patent
Title

Elektrooptische und photonische Bauelemente

Other Title
Stable electro-optical or photonic device with small optical loss, resistant to relaxation after orientation - has layer of oriented, cross-linked poly adduct of glycidyl ether or ester compound with non-linear optically active groups and organic di or poly cyanate.
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 glycidyl ether or glycidyl ester groups reacting with cyanate groups and (b) organic di- or polycyanate(s) (III). 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 optical losses are small. Usually, rel axation is avoided up to temperatures > 100 deg. C and (I) are stable at temperatures > 200 deg. C. Very wide variation of the optical properties is possible.
Inventor(s)
Nordmann, J.
Beckmann, S.
Etzbach, K.H.
Sens, R.
Bauer, M.
Krueger, H.
Bauer, J.
Guenzelmann, C.
Hartmann, H.
Walter, A.
Link to Espacenet
http://worldwide.espacenet.com/publicationDetails/biblio?DB=worldwide.espacenet.com&locale=en_EP&FT=D&CC=DE&NR=19639445A
Patent Number
1996-19639445
Publication Date
1998
Language
German
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