title: Thermal damage suppression of a black phosphorus saturable absorber for high-power operation of pulsed fiber lasers.
abstract: Recent studies of black phosphorus (BP) have shown its future potential in the field of photonics. We determined the optical damage threshold of BP at 21.8 dBm in a fiber ring laser cavity, and demonstrated the high-power operation capacity of an evanescent field interaction-based BP saturable absorber. The long-term stability of a passively mode-locked fiber laser with a saturable absorber operating at the optical power of 23.3 dBm was verified for 168 h without any significant performance degradation. The center wavelength, spectral width, and pulse width of the laser output are 1558.8 nm, 14.2 nm, and 805 fs, respectively.
authors.affiliation: Center for Opto-Electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, Korea. College of Engineering, University of Canterbury, Christchurch, 8140, New Zealand.
authors.forename: Donghyun
authors.initials: D
authors.lastname: Lee
authors.forename: Kichul
authors.initials: K
authors.lastname: Park
authors.forename: Pulak C
authors.initials: PC
authors.lastname: Debnath
authors.forename: Inho
authors.initials: I
authors.lastname: Kim
authors.forename: Yong-Won
authors.initials: YW
authors.lastname: Song