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Ten-port graded-index waveguide star coupler fabricated by dry ion diffusion process

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2 Author(s)
Kaede, K. ; NEC Corporation, Opto-Electronics Research Laboratories, Kawasaki, Japan ; Ishikawa, R.

A ten-port planar star coupler has been developed, utilising multimode waveguides easily formed in a glass substrate by evaporated silver ion diffusion. The waveguides have circular cross-sections with graded-index profile, which matches well to graded-index multimode fibres. Insertion loss of 6 dB and the loss variation of 0.8 dB were attaied.

Published in:

Electronics Letters  (Volume:20 ,  Issue: 16 )