Optical waveguides – With optical coupler – Plural
Patent
1998-10-27
2000-12-12
Ngo, Hung N.
Optical waveguides
With optical coupler
Plural
385 37, 359124, 359133, G02B 626
Patent
active
061609315
ABSTRACT:
A wavelength-multiplexing optical transmission system includes (a) an optical transmitter 100 for wavelength-multiplexing a plurality of optical signals having different wavelengths and transmitting a wavelength-multiplexed optical signal, (b) an optical fiber cable 4 for transmitting a plurality of transmitted optical signals, and (c) an optical receiver 101 for receiving a plurality of transmitted optical signals. The optical receiver 101 includes a wavelength selector 20 for demultiplexing an optical signal having a predetermined wavelength of a plurality of received optical signals and outputting the demodulated signal. The wavelength selector 20 has comb-shaped wavelength selection characteristics for selectively filtering an optical signal having a plurality of selected wavelengths. A wavelength selection interval .DELTA..lambda. between two adjacent selected wavelengths of the wavelength selection characteristics is different from a signal wavelength interval .delta..lambda. between two adjacent signal wavelengths of a plurality of wavelength-multiplexed optical signals. The difference therebetween is set so that substantially a single optical signal is selectively filtered from a plurality of received optical signals. The wavelength selector 20 includes a wavelength control mechanism 10 for shifting the selected wavelengths of the wavelength selection characteristics, respectively.
REFERENCES:
patent: 5673129 (1997-09-01), Mizrahi
patent: 5808762 (1998-09-01), Vanoli et al.
patent: 5953139 (1999-09-01), Nemecek et al.
patent: 5956166 (1999-09-01), Ogata et al.
Matsushita Electric - Industrial Co., Ltd.
Ngo Hung N.
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