All-Optical Switching Phenomenon in Polydiacetylene (12, 8) Based Nonlinear Directional Coupler

Akimasa KANEKO  Takashi KUWABARA  Tatsuo WADA  Hiroyuki SASABE  Keisuke SASAKI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E77-C   No.5   pp.704-708
Publication Date: 1994/05/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Organic Functional Devices)
Category: 
Keyword: 
nonlinear directional coupler,  optical Kerr effect,  all-optical switching,  polydiacetylene (12,8),  mode-locked Ti: Sapphire laser,  

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Summary: 
Optical Kerr effect were applied to all-optical switching devices in the form of nonlinear waveguide directional couplers. The nonlinear waveguide directional coupler consists of a quartz thin gap between two Corning 7059 guided layers on a pyrex substrate with ion-milled grating and organic thin film as a top layer. The vacuum-deposited polydiacetylene (12, 8) film was used as an organic nonlinear material. Power-dependent switching phenomenon in this asymmetrical nonlinear directional coupler was observed by 100 fs pulse duration of mode-locked Ti: Sapphire laser.