Development of all-fiber Fabry-Perot pulse laser with a fiber type saturable absorber and improvement of the oscillation characteristics

The authors developed high-concentration erbium doped fiber as a saturable absorber, making use of its concentration quenching. Then, they developed an all-fiber Fabry-Perot pulse laser with high-concentration erbium doped fiber and demonstrated that it enables stable and passive pulse oscillation regardless of disturbance. Furthermore, they successfully improve power efficiency and shortening pulse width to 1.8 μs by optimizing the structure of the fiber laser.