Abstract
To improve the power spectral response of directional coupler type demultiplexers, the three-guide coupler with varying coupling coefficients along the light propagation direction is theoretically examined. A new configuration of the three-guide coupler is presented, which gives 0.16- and 0.13-μm rejection bandwidths of −20 dB in the 1.3- and 1.55-μm wavelength regions, respectively. These are 5 times wider than the conventional two-guide coupler demultiplexer. Furthermore, a simple design method for obtaining the coupler parameters is presented.
© 1990 Optical Society of America
Full Article | PDF ArticleMore Like This
Shogo Ura, Masaaki Morisawa, Toshiaki Suhara, and Hiroshi Nishihara
Appl. Opt. 29(9) 1369-1373 (1990)
Katsuyuki Imoto, Hirohisa Sano, and Masaru Miyazaki
Appl. Opt. 26(19) 4214-4219 (1987)
K. Watanabe and K. Yasumoto
J. Opt. Soc. Am. A 14(11) 2994-3000 (1997)