Optical signal equalizer for wavelength division multiplexed opt

Details Optical signal equalizer for wavelength division multiplexed opt Optical signal equalizer for wavelength division multiplexed opt

1991-11-22

1994-01-04

Goldstein, Herbert

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359127, 359161, 359173, 385 7, 385 24, H04J 1402, H04B 1000, G02B 628

Patent

active

052765431

ABSTRACT:
This invention disclosure describes the application of a polarization insensitive acoustically-tuned optical filter used in a multichannel WDM system to equalize variations in the power level of the WDM channels. The invention also describes a simple means for providing a low frequency control system which enables the equalizer to determine the signal levels of N optical carriers prior to equalizing the signals.

REFERENCES:
patent: 4693547 (1987-09-01), Soref et al.
patent: 5002349 (1991-03-01), Cheung et al.
patent: 5007693 (1991-05-01), Yamazaki et al.
patent: 5050954 (1991-09-01), Gardner et al.
IEEE Journal on Selected Areas in Communications vol. 8 No. 6 Aug. 1990 Cheung p. 1015 Acoustic Tunable Filters in narrowband WDM Networks System Issues and Network Applications.
OFC'91 Alferness et al. p. 143 InGaAsP/InP Buried Rib Waveguide Vertical Coupler Filter Feb. 21, 1991.
Ofc '91 Wu et al. Ultra Narrow Bandwidth InP/InGaAsP Directional Coupler Filter p. 144 Feb. 21, 1991.
OFC '91 Zamkotsian et al. Efficient 45.degree. Polarization Converter on (110) InP p. 145 Feb. 21, 1991.
OFC '91 Smith et al. Waveguiding Devices p. 142 Feb. 21, 1991.
IEEE Journal on Selected Areas in Communications vol. 8 No. 6 Aug. 1990 p. 1151 Smith et al. Integrated-Optic Accoustically-Tunable Filters for WDM Networks.

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