[OPTICAL REVIEW Vol. 3, No. 6B (1996) 481-483
Efficient Planar -Type Butt Coupling of a Proton-Exchanged Waveguide on a Z-Cut LiTa03 Substrate
Yasuo KITAOKA, Hidehiko WADA, Seiji NISHlNO, Kiminori MIZUUCHI, Kazuhisa YAMAMOTO and Makoto KATO
Optical Disk Systems Development Center, Matsushita Electric Industrial Co., Ltd., 3-1-1, Yagumo-nakamachi, Moriguchi, Osaka, 570 Japan
(Received August 26, 1996; Accepted September 30, 1996)
A half-wave thin film was formed on the facet of a proton-exchanged waveguide by the oblique deposition of Ta2O5 Planar-type butt coupling of the waveguide on the z-cut LiTaO3 substrate to the AIGaAs laser diode in transverse electric mode oscillation was realized with coupling efficiency as high as 53%.
Key words : butt coupling, proton-exchanged waveguide, oblique deposition, thin film