Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1998-02-26
2000-05-16
Chan, Jason
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359124, 359183, 359188, H04B 1000
Patent
active
060645032
ABSTRACT:
Disclosed is a light source for wavelength division multiplexing communications which has: a unit for outputting light with a wavelength band having a constant width; a unit for dividing the light into first dividied light and second divided light; at least one selective wavelength blocking unit which blocks selectively light with a specific wavelength of the first divided light to output light that the light with a specific wavelength is removed; a unit for conducting such a phase control that the phase difference between the selectively-wevelength-blocked light and the second divided light is 180.degree. to each other and for outputting first phase-controlled light and second phase-controlled light; and a coupling for coupling the first phase-controlled light and the second phase-controlled light to output coupled light.
REFERENCES:
patent: 5157744 (1992-10-01), Korotky
patent: 5717510 (1998-02-01), Ishikawa et al.
Akahori Katsushi
Toyohara Atsushi
Chan Jason
NEC Corporation
Phan Hanh
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