We proposed to use a distributed feedback structure with a weighted coupling coefficient (W-DPB) 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-DPB structure were discussed compared with those of a conventional DPB structure. The W-DPB optical bistable device exhibits high on-state transmittance and low-threshold input intensity. Fabrication of the W-DPB 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 CHP3.
© 1996 Optical Society of America
Katsumi Nakatsuhara, Tetsuya Mizumoto, Ryuhei Munakata, and Yoshiyuki Naito, "Weighted distributed feedback structure for all-optical bistable devices," Appl. Opt. 35, 1507-1511 (1996)