LOW-POWER OPTICAL BISTABILITY AND PHASE CONJUGATION IN POLYDIACETYLENE

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Submitted on 1 Jan 1988

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LOW-POWER OPTICAL BISTABILITY AND PHASE CONJUGATION IN POLYDIACETYLENE

W. Blau

To cite this version:

W. Blau. LOW-POWER OPTICAL BISTABILITY AND PHASE CONJUGATION IN POLYDIACETYLENE. Journal de Physique Colloques, 1988, 49 (C2), pp.C2-85-C2-86.

�10.1051/jphyscol:1988218�. �jpa-00227635�

JOURNAL DE

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LOW-POWER OPTICAL BISTABILITY AND PHASE CONJUGATION I N POLYDIACETYLENE

W. BLAU

Department o f Pure and A p p l i e d P h y s i c s , T r i n i t y C o l l e g e , D u b l i n

I r e l a n d

Thelarally induaed optical bietability i s reparted at 514 nm using a Fnbry-&rot cavity filled with polydiacetylene. 8imultancoua degenerate f-uave mixing shavs corresponding bistable behaviour of the phase

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Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:1988218

C2-86

JOURNAL DE PHYSIQUE

I n the o c p e x - h m t n M alrcmolod Archer operattng on the X=514 run l i n e wu employsd. Fig. l a ~howa a t y p i e d b l a t o b l e loop o b t a i n e d i n the W t a l u e m e e o l u t i o n . A d t o h - u p frcm a low t x u n a u i t t i a ta a

high

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The s t a t e of n biztablr: element mu>- he probed s i m u l t a n e o ~ ~ ~ l ~ v i a o p t i c s 1

~>h.asr= C-onjugation by d n g c n e r n t . ~ four-wave mixing. The m d i n g wave i n t.hs Fabry-Perot. c ~ v i t y provides t h e farward and backwards g o i n g pump tmven, khercns t.he probe beam ha8 t o be s e n t i n separately a t a m 1 1 angle. The

-e m n j u g n t e signal r e t r a e e s t h e probe beam and is nnhnnncld due t o t h e i n t e r f e r e n c e e f f e c t s i n s i d e the cavity. I n the experimnnt, p a r t of the l a s e r berm UILS u p l i t o f f by a gloss s d g e ( R S . 0 5 ) and e e n t i n t o t h e ample v i a r e f l e c t i o n o f f a second g l a s s p l a t e ( R S . 5 ) st an angle of 1.2 d e g m a . The phase c o n j u g a t e signal w u l d then be detected behind t h i s glms p l a t e with o t h i r d photcxficdc. Fig. l b d e p i c t s the +s c o n j u g a t e x w f l e c t i v i t y R V e n u s t h e incident. p m r p intensity i n t h e s a m e aample an s h m i n Fin.

la. A c o r r e s ~ n d i n g b i s t s b l e l o o p is observad.

The e x p e r i m e n t a l o b e e r v a t i o n s are i n r e s s o n a b l e agreement with mods1 calculations b e d on thenrmlly induced index change..

0 1 2 3 4 5 8

INPUT POWER ( m W ) INPUT P O W E R (mW1

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