All-fiber wavelength-widely tunable multi-pulse gain-switched Tm3+-doped double-clad fiber laser. (April 2022)

• Record Type: Journal Article
• Authors: Zhang, Huiru; Wu, Duanduan; Wang, Rongping; Dai, Shixun
• Is Part Of: Optics & laser technology. Volume 148(2022)
• Publication Date: 2022-04
• Subjects: Gain switching -- Tm3+-doped double-clad fiber laser -- Wavelength-tunable -- Multi-pulse; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2021.107710
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: We report a multi-pulse gain-switched Tm 3+ -doped fiber laser with 793 nm pump source. Tm 3+ -doped double clad fiber provides large laser gain, the single-pulse energy can reach 4.3 μJ and the multi-pulse energy can be 13.2 μJ. The all-fiber structure gain switched TDCFL has a wide wavelength tunable range of 1944–2049 nm. The larger pulse energy, the higher repetition rate and the longer pulse duration of the pump source will be easier to lead to multi-pulse phenomenon. Abstract: We report a wavelength-widely tunable multi-pulse gain-switched Tm 3+ -doped fiber laser. The laser has a continuous wavelength-tunable range of 105 nm in 2 μm band. The combination of Tm 3+ -doped double clad fiber and 793 nm pulsed pump source achieves large-energy pulse and multi-pulse operation. The single-pulse energy can reach 4.3 μJ and the multi-pulse energy can be 13.2 μJ. The effects of pump pulse energy, pulse repetition rate and pulse duration on multi-pulse generation are studied in detail. This easy-to-operate large-energy 2 μm pulsed fiber laser with adjustable pulse duration and repetition rate can provide a stable single-pulse or multi-pulse source in spectroscopy, medical surgery, material processing, etc.