Reversible amplifier for optical networks

Details Reversible amplifier for optical networks Reversible amplifier for optical networks

1998-01-27

2000-08-08

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359282, 359484, 385 6, H01S 300, G02B 2728

Patent

active

06101026&

ABSTRACT:
A reversible optical isolator and optical amplifier based on the optical isolator. The reversible isolator is constructed from a Faraday rotator having a magnetic field direction that is determined by a control signal applied thereto. The Faraday rotator is sandwiched between first and second polarization filters. The polarization filters may be constructed from polarization splitters in series with half-wave plates. The allowed direction of propagation of an optical signal through the reversible optical amplifier is determined by the magnetic field direction in the Faraday rotator. An optical amplifier according to the present invention includes an optical gain element in series with one or two reversible optical isolators.

REFERENCES:
patent: 4650289 (1987-03-01), Kuwahara
patent: 5815308 (1998-09-01), Kim et al.
patent: 5912766 (1999-06-01), Pattie

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