Patent ID: 6122413
Filing Date: 2000-09-19
Classification: G02B,H04B

Abstract:
A fiber optic transmitter comprising:a single longitudinal mode, single polarization fiber laser constructed and arranged to simultaneously have a signal output and a pump output;a polarization maintaining wavelength division multiplexer (PM WDM) connected to said fiber laser for separating the pump output from the signal output, said PM WDM outputting the signal output on a first output trunk and the pump output on a second output trunk;a polarization maintaining optical isolator (PM isolator) connected to the first output trunk of the PM WDM;a modulator connected to the PM isolator;a first wavelength division multiplexer (WDM) having a first input connected to an output of the modulator, and a second input connected the second output trunk of the PM WDM, said first WDM recombining the signal output and the pump output after modulation of the signal output; anda rare-earth doped fiber having an input end connected to an output of the first WDM.