Polarization independent optical amplifier apparatus

Details Polarization independent optical amplifier apparatus Polarization independent optical amplifier apparatus

1988-07-29

1990-07-17

Arnold, Bruce Y.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

350385, 350386, 350387, 350388, 330 43, 370 2, 372703, 455606, 455616, G02B 530

Patent

active

049417380

ABSTRACT:
A polarization independent semiconductor amplifier is used in a double-pass configuration; that is, the output of the amplifier is passed through a 45.degree. Faraday rotator to a mirror and then through the rotator and the amplifier again. Polarization independent gain is thus achieved.

REFERENCES:
patent: 3597695 (1971-08-01), Swain et al.
patent: 4019151 (1977-04-01), Brueckner
patent: 4321550 (1982-03-01), Evtuhou
patent: 4344042 (1982-08-01), Hon
patent: 4441186 (1984-04-01), Erickson
patent: 4637026 (1987-01-01), Liu
patent: 4637027 (1987-01-01), Shirasaki et al.
patent: 4734911 (1988-03-01), Bruesselback
Y. Mitsuhashi et al., "Polarization-Rotated Optical Feedback in Self-Coupled Optical Pickup", Optics Communications, vol. 34, No. 3, 9/80, pp. 309-310.
Brueckner et al., "Double Pass Lasers Amplifiers," Applied Optics, Oct. 1974, vol. 13, No. 10, pp. 2183-2185.
"A Polarization-Independent Optical Circulator for 1.3 um", Journal of Lightwave Technology, vol. LT-1, No. 3, W. L. Emkey, Sep. 1983, pp. 466-469.
"Optical Amplifier Configurations with Low Polarization Sensitivity", Electronics Letters, Dec. 3, 1987, vol. 23, No. 25, pp. 1387-1388, G. Grobkopf et al.

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