Yousuke KOBAYASHI and Hiroyuki TSUDA

School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan

(Received March 22, 2005; Accepted August 9, 2005)

Crosstalk reduction using tapered intersecting waveguides has been proposed and demonstrated experimentally. The crosstalk with a small intersection angle of up to 20° was theoretically investigated, by applying coupled mode theory. Experimental results show that the crosstalks between wide taper intersecting waveguides with the angles of 13 to 20° are decreased with respect to the crosstalk of the intersecting linear waveguide.

Key words: optical waveguide, silica, intersection, crosstalk, coupled mode theory, optical integrated circuit