Title :
Ten-port graded-index waveguide star coupler fabricated by dry ion diffusion process
Author :
Kaede, Kazunori ; Ishikawa, Ryo
Author_Institution :
NEC Corporation, Opto-Electronics Research Laboratories, Kawasaki, Japan
Abstract :
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.
Keywords :
losses; optical couplers; optical workshop techniques; Ag ions; circular cross-sections; dry ion diffusion process; graded-index profile; insertion loss; loss variation; multimode waveguides; ten-port planar star coupler;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840443
