[OPTICAL REVIEW Vol. 3, No. 2 (1996) 120-123]

TE-TM Mode Converter Using Optically Active Polymer

Shinzo MUTO,1 Tomoyasu SAKAGAMI,1 Yoshihiko SAKANE,2 Akira NAMAZUE,2 Eisuke NIHEI2 and Yasuhiro KOIKE2

1Department of Electrical Engineering and Computer Science, Faculty of Engineering, Yamanashi University, 4-3-11, Takeda, Kofu, 400 Japan, 2Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223 Japan

(Received November 21, 1995; Accepted January 12, 1996)

A novel TE-TM mode converter using optically active polymer: poly-l-menthylmethacrylate (PMtMA) was studied theoretically and experimentally. In a three-layered slab waveguide consisting of the PMtMA core layer on a fused quartz substrate, a low-loss TE0-TM0 mode conversion with an efficiency of 60 to 70% was easily obtained for the first time at a wavelength of 441.6 nm. The method to achieve a phase-matched operation of this polymer TE-TM mode converter was also discussed.

Key words : optically active polymer, slab waveguide, TE-TM mode converter, rotatory power, coupling length