H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 14/00 (2006.01) G02B 6/293 (2006.01)
Patent
CA 2333437
In the optical multiplexer/demultiplexer according to the invention, an MMI (multi mode interference) coupler having a percentage coupling of about 50% is used as first and second optical couplers, and a directional coupler having a percentage coupling of less than 10% is used as third and fourth optical couplers. By virtue of this constitution, the optical multiplexer/demultiplexer according to the invention has a small dependency upon wavelength and can be used in a wide waveband, is less susceptible to a preparation error, and, at the same time, has good wavelength flatness in passband and a wide rejection band.
Arai Hideaki
Chiba Takafumi
Uetsuka Hisato
Hitachi Cable Ltd.
Smart & Biggar
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