Output Polarization Control of Fiber DFB Laser Using Injection Locking

Abstract—Experimental results of a distributed feedback fiber laser injection locked to a Fabry–Pérot laser diode are presented. By adjusting the injection power of the fiber laser to the Fabry–Pérot laser, high quality laser output with a degree of polarization larger than 95 % and sidemode suppression ratio higher than 45 dB was achieved. A 3.8-dB power penalty improve-ment was also demonstrated in a 41-km 10-Gb/s transmission experiment. Index Terms—Fabry–Pérot laser, fiber DFB laser, injection locking. I