Abstract

Efficient tapered Nb₂O₅ transition waveguide obtained by reactive sputtering has been demonstrated experimentally. It provides effective interconnection between two sections of Ti-indiffused waveguide with 0.8-dB total insertion loss. Chirped grating lenses have also been fabricated on Nb₂O₅ waveguides that have yielded 85% throughput efficiency. For signal processing applications in Ti-indiffused waveguides, the combination of grating lenses and the Nb₂O₅ transition waveguide will allow us to obtain lens functions that have both high efficiency and large angular field of view (∼4°).

© 1983 Optical Society of America

Mach-Zehnder interferometer tuning with Ta₂O₅ film loading

M. J. Ahmed and L. Young
Appl. Opt. 22(24) 4082-4087 (1983)

Refractive index and attenuation characteristics of SiO₂–Ta₂O₅ optical waveguide film

Mario Kobayashi and Hiroshi Terui
Appl. Opt. 22(19) 3121-3127 (1983)

Effect of fabrication tolerances on the diffraction performance of chirped grating lenses on planar optical waveguides

Jean-Marc P. Delavaux and William S. C. Chang
Appl. Opt. 24(2) 227-231 (1985)

Photoinduced grating filters in GeO₂ thin-film waveguides

Zhong-Yi Yin, Paul E. Jessop, and Brian K. Garside
Appl. Opt. 22(24) 4088-4092 (1983)

Waveguide grating lenses for optical couplers

Gen-ichi Hatakoshi, Harumi Fujima, and Kenya Goto
Appl. Opt. 23(11) 1749-1753 (1984)