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 CdS x Se1−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
Original Manuscript: June 21, 1995
Revised Manuscript: October 3, 1995
Published: March 20, 1996
Katsumi Nakatsuhara, Tetsuya Mizumoto, Ryuhei Munakata, and Yoshiyuki Naito, "Weighted distributed feedback structure for all-optical bistable devices," Appl. Opt. 35, 1507-1511 (1996)