[OPTICAL REVIEW Vol. 4, No. 5 (1997) 543-545]
Waveguide Array Wavelength Router Design to Improve Insertion Loss Uniformity
Hideaki OKAYAMA and Takeshi KAMIJOH
R&D Group, Oki Electric Industry Co., Ltd., 550-5, Higashiasakawa, Hachioji, Tokyo, 193 Japan
(Received July 10, 1997; Accepted July 16, 1997)
We propose a wavelength router design to improve insertion loss uniformity. Branched waveguides are placed at junctions between the waveguide array and a planar waveguide. The diffracted light injected into planar waveguides is forwarded in different directions. At the image plane of the planar waveguide, a flat top envelope is attained to ensure loss uniformity among output ports.
Key words : waveguide array, wavelength router, insertion loss