Publication IEICE TRANSACTIONS (1976-1990)Vol.E73No.1pp.99-104 Publication Date: 1990/01/25 Online ISSN: DOI: Print ISSN: 0000-0000 Type of Manuscript: Special Section PAPER (Special Issue on International Conference on Integrated Optics and Optical Fiber Communication) Category: Optical Waveguides and Their Devices Keyword:
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Summary: Small-size directional coupler type optical multi/demultiplexers using high refractive-index-difference composite-glass waveguides have been investigated. A novel design to minimize wavelength response sensitivity to waveguide width deviation in the coupler part was proposed. Composite glass waveguides with 5% were fabricated using Corning 7059 glass for the core and SiO2 for the cladding. 1.3/1.55-µm optical multi/demultiplexers with short coupler length of 300 µm, low insertion loss of 5 dB and high crosstalk attenuation of more than 25 dB were realized.