Gain clamped amplifier

Details Gain clamped amplifier Gain clamped amplifier

1996-12-04

1999-02-16

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359133, 359340, 359346, 385 8, 372 6, H01S 306, H01S 317

Patent

active

058726497

ABSTRACT:
The gain provided by an erbium amplifier is stabilised by spectrally selective optical feedback to make the amplifier lase. The resulting laser emission is extracted from the amplifier output using a Mach Zehnder with matched Bragg reflectors in its two interference arms. The extracted light may be used for supervisory purposes. Part of the laser cavity defining feedback may be provided by the Mach Zehnder by arranging one of its Bragg reflectors to be displaced with respect to the other.

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Delevaque, et al., "Gain Control in Erbium-Doped Fibre Amplifiers by Lasing at 1480nm With Photoinduced Bragg Gratings Written on Fibre Ends," Electronic Letters, Jun. 10, 1993, vol. 29, No. 12, pp. 1112-1114.

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