Optical waveguides – Polarization without modulation
Patent
1991-08-29
1992-07-21
Healy, Brian
Optical waveguides
Polarization without modulation
385 14, 385 28, 359484, G02B 610, G02B 612
Patent
active
051330288
ABSTRACT:
There is provided an optical wave-length filter which is constituted by a wave-guide route formed on a surface of a substrate; a front stage polarizer disposed in the wave-guide route for transmitting as an input light either TM mode light or TE mode light; a plurality of mode-converters disposed in the wave-guide route for mode converting one TM/TE-mode light transmitted from the front stage polarizer having a conversion wave length corresponding to an output light of the optical wave-length filter into the other TE/TM-mode light; and a rear stage polarizer disposed in the wave-guide route for transmitting as the output light of the optical wave-length filter the other TE/TM-mode light; the mode-converters being constituted by a finger-type electrode for control and a finger-type electrode for earthing interdigitally coupled for each other and disposed along the wave-guide route.
REFERENCES:
patent: 4359260 (1982-11-01), Reinhart et al.
patent: 4533207 (1985-08-01), Alferness
patent: 4898441 (1990-02-01), Shimizu
patent: 4966431 (1990-10-01), Heismann
patent: 5002349 (1991-03-01), Cheung et al.
Tamir (Ed.) Guided-Wave Optoelectronics (Springer-Verlag, 1988) pp. 192-197.
Ishida Toshimasa
Okayama Hideaki
Yaegashi Hiroki
Healy Brian
Manzo Edward D.
OKI Electric Industry Co., Ltd.
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