Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-12-19
1993-07-27
Moskowitz, Nelson
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359589, H01S 220, H01L 1500
Patent
active
052315290
ABSTRACT:
A multi-wavelength light amplifier comprises a light amplifier for amplifying a wavelength division multiplex signal with accompanying generation of spontaneous emission. An optical coupler is provided for coupling light from the light amplifier to a wavelength filter, such as Fabry-Perot filter. The filter has a plurality of spectral peaks of transmittance and corresponding valleys of reflectance, with the spectral peaks and valleys corresponding respectively to the wavelengths of the multiplex signal. The optical coupler further provides coupling of light reflected from the wavelength filter to an optical sink by which the undesired spontaneous emission is absorbed.
REFERENCES:
patent: 3792916 (1974-02-01), Sarna
patent: 4358851 (1982-11-01), Scifres et al.
patent: 4487478 (1984-12-01), Jackson
patent: 4707064 (1987-11-01), Dobrowolski et al.
patent: 4747673 (1988-05-01), Marrs et al.
patent: 4945531 (1990-07-01), Suzuki
patent: 4947134 (1990-08-01), Olsson
Shu Yamamoto, "Long-Haul High-Speed Optical Communication Systems Using a Semiconductor Laser Amplifier", OFC '88, p. 18.
Moskowitz Nelson
NEC Corporation
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