Abstract

We proposed to use a distributed feedback structure with a weighted coupling coefficient (W-DFB) in an all-optical bistable device in order to improve on-state transmittance and to reduce threshold intensity. Through numerical calculations, characteristics of the W-DFB structure were discussed compared with those of a conventional DFB structure. The W-DFB optical bistable device exhibits high on-state transmittance and low-threshold input intensity. Fabrication of the W-DFB structure with a periodicity of 169.8 nm is demonstrated on a CdSxSe1−x-doped glass substrate by means of holographic exposure with a double-coated photoresist and reactive ion etching in CHF3.

© 1996 Optical Society of America

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