title: Widely power-tunable polarization-independent ultrafast mode-locked fiber laser using bulk InN as saturable absorber.
abstract: The growing demand of ultrafast mode-locked fiber lasers in the near infrared has boosted the research activity in this area. One of the most convenient ways to achieve passive mode locking consists of inserting a semiconductor saturable absorber in the laser cavity to modulate the losses. However, in such a configuration, the limited power range of operation is still an unsolved issue. Here we report the fabrication of an ultrafast, high-power, widely power-tunable and non-polarization-dependent mode-locked fiber laser operating at 1.55 µm, using an InN layer as saturable absorber. With post-amplification, this laser delivers 55-fs pulses with a repetition rate of 4.84 MHz and peak power in the range of 1 MW in an all-fiber arrangement.
authors.forename: M
authors.initials: M
authors.lastname: Jimenez-Rodriguez
authors.forename: L
authors.initials: L
authors.lastname: Monteagudo-Lerma
authors.forename: E
authors.initials: E
authors.lastname: Monroy
authors.forename: M
authors.initials: M
authors.lastname: González-Herráez
authors.forename: F B
authors.initials: FB
authors.lastname: Naranjo