Open AccessSub-hundred nanosecond pulse generation from a black phosphorus Q-switched Er-doped fiber laser
Author(s) -
Chunxiang Zhang,
Yu Chen,
Taojian Fan,
Yanqi Ge,
Chujun Zhao,
Han Zhang,
Shuangchun Wen
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.379828
Subject(s) - nanosecond , materials science , q switching , saturable absorption , fiber laser , lasing threshold , optics , laser , optoelectronics , pulse duration , black phosphorus , pulsed laser deposition , pulse (music) , optical cavity , physics , wavelength , detector
Black phosphorus (BP), a prosperous two-dimensional optoelectronic material, has been deeply developed for various optoelectronics applications. Here, we demonstrate a sub-hundred nanosecond passively Q-switched Er-doped all-fiber laser with BP as the saturable absorber (SA). The BP-SA is fabricated by a controllable optical deposition technique. To achieve the sub-hundred nanosecond Q-switching output, we deliberately enlarge the modulation depth of the BP-SA by suitably increasing the time and laser power of the optical deposition and shortening the laser cavity length with an integrated multifunctional component. A stable Q-switched pulse train was obtained with a pulse duration as narrow as 91 ns, and the Q-switched lasing characteristics based on the BP-SA have also been investigated and discussed. The experimental results indicate that the BP material can be employed as an effective SA for the nanosecond pulse generation.