Fiber optic transmitter

Details Fiber optic transmitter Fiber optic transmitter

1998-10-20

2000-09-19

Palmer, Phan T. H.

Optical waveguides

Temporal optical modulation within an optical waveguide

385 4, 385 24, 359341, 359180, 372 6, G02F 101

Patent

active

061224138

ABSTRACT:
A fiber optic transmitter provides integrated creation and amplification of a fiber optic signal from a single pump source. A fiber laser is utilized to produce a signal output and a remnant pump output from a single pump source. The remnant pump output is divided out of the signal path while the signal output is modulated and then recombined with the modulated signal output and passed through an erbium doped fiber which absorbs the pump output to amplify the modulated signal output. The output from the fiber laser is input into a first wavelength division multiplexer (WDM) which divides the pump output from the signal output. The first WDM outputs the signal output on a first output trunk and the pump output on a second output trunk. A modulator is connected to the first output trunk of the first WDM for modulating the signal output. A second WDM having a first input connected to the output of the modulator and a second input connected to the second output trunk (pump output) of the first WDM recombines the signal output and the pump output after modulation of the signal output. The recombined signal and pump outputs are then passed through a rare-earth doped fiber to amplify the modulated signal output.

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