Optical element and compounds used in its manufacture

Details Optical element and compounds used in its manufacture Optical element and compounds used in its manufacture

1997-02-12

2000-11-07

Wu, Shean C.

Compositions

Light transmission modifying compositions

560 43, 560 48, 564441, 564442, 564443, F21V 900, C07C 6976, C07C21100

Patent

active

061432083

ABSTRACT:
An optical frequency conversion element has a wave-guiding layer which consists of a .chi..sup.(2) -active ferroelectric liquid crystal. The monomeric or polymeric liquid crystal material has a periodic structure which permits the so-called quasi phase matching of a guided laser beam. The period length of the structure is equal to twice the coherence length l.sub.c =.pi./.DELTA..beta. of the material, whereby .DELTA..beta.=.beta..sub.o (2.omega.)-2.beta..sub.o (.omega.), with .omega.=angular frequency of the fundamental wave, 0=zero-order mode and .beta.=propagation constant of the mode.

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