Quasi-phased matched optical waveguide frequency conversion elem

Details Quasi-phased matched optical waveguide frequency conversion elem Quasi-phased matched optical waveguide frequency conversion elem

1993-08-05

1994-08-02

Gonzalez, Frank

Optical waveguides

Having nonlinear property

459 42, 459103, 459332, 385143, 385145, H03F 700

Patent

active

053353030

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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