Fiber laser modelocked by the nonlinear polarization rotation Sagnac interferometer

摘要

We report experiments on a fiber laser configuration based on a nonlinear Sagnac interferometer with a symmetrical coupler, a quarter-wave retarder, and a highly twisted low-birefringence fiber. The modelocking operation is achieved by nonlinear polarization rotation. We achieved stable generation of subpicosecond pulses with milliwatts of average output power.