Optical fiber amplifier including rare earth doped fiber and fee

Details Optical fiber amplifier including rare earth doped fiber and fee Optical fiber amplifier including rare earth doped fiber and fee

1992-06-03

1993-09-14

Healy, Brian

Optical waveguides

Having particular optical characteristic modifying chemical...

Of waveguide core

385 12, 385 32, 385123, 385141, 372 6, 372 29, 372 69, 372 70, 359341, 359345, G02B 600, H01J 330

Patent

active

052456900

ABSTRACT:
An optical amplifier using either rare-earth doped optical fiber, which can amplify an optical signal when a pumping light is injected, or a laser diode amplifier, which can amplify an optical signal by injection of an electric current. The amplifiers being of simple construction and having a gain which can be maintained constant through feedback control based on the detection of spontaneous emission from the sides of either the rare-earth doped optical fiber or the laser diode. The control being performed without the need for detection of input or output optical signal of the optical amplifier.

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