Feasibility of Kerr-lens mode locking in fiber lasers

摘要

A mechanism of Kerr-lens mode locking in fiber laser is proposed and analyzed. It could be realized in active photonic-crystal fibers with finite number of the air holes hexagonally arranged around the core with refractive index larger than refractive index of the glass matrix and relies at decrease of the mode confinement loss for higher intensity and mode transformation from leaky to guided when refractive index in the core increases owing to Kerr self-focusing.