Generation of soliton pulse with Non-linear Polarization Rotation (NPR) Passive Mode Locked fiber Laser

Abstract

Soliton pulses with picosecond time duration whose amplitude and temporal distribution is random and their repetition frequency correspond to the fundamental frequency have been generated from NPR mode-locking fiber laser.

On the spectral sidebands’ evolution of mode-locked fiber lasers

“…Nonlinear polarization rotation (NPR) mode-locking is based on the variation of polarization state related to the intensity of the optical signal in the cavity, and in which, saturable absorption is achieved by intracavity polarization devices. 5 Owing to the intrinsic advantages of simple structure, high modulation depth, short response time, and low component cost, the NPR technique is widely investigated and applied in various fields. In mode-locked fiber lasers, the soliton pulse is disturbed periodically, and additional interferences can cause the modulation instability generated in the cavity.…”