Optical equalizer

Details Optical equalizer Optical equalizer

1997-12-08

1999-08-03

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359179, 359337, G02F 139, H01S 306, H04B 1016

Patent

active

059332700

ABSTRACT:
An optical equalizer for a wavelength-multiplexed optical communication system where an optical signal composed of a plurality of signal lights with different wavelengths is transmitted through an optical transmission line. The optical equalizer having: an optical coupler which has first to third ports where the optical signal to be input to the first port is output from the second port and the optical signal to be input to the second port is output from the third port; a wavelength division multiplexing type coupler which has at least one port and a plurality of ports where the one port is connected to the second port, the wavelength division multiplexing type coupler receiving the optical signal output from the second port, dividing the optical signal into the plurality of signal lights, outputting separately the signal lights to the plurality of ports, and coupling lights to be separately input to the plurality of ports to output to the one port; and a plurality of light-reflecting means which are separately connected to the plurality of ports of the wavelength division multiplexing type coupler.

REFERENCES:
patent: 5276543 (1994-01-01), Olshansky
patent: 5392154 (1995-02-01), Chang et al.
patent: 5519796 (1996-05-01), Li et al.
patent: 5557442 (1996-09-01), Huber
patent: 5636054 (1997-06-01), Artigaud et al.
patent: 5636301 (1997-06-01), O'Sullivan et al.
Elrefavic et al, IEEE Photonics technology Lett., vol. 5, #9, pp. 1026-1026. abstract only herewith, Sep. 1993.

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