Abstract

We demonstrate a widely tunable $Q$-switched dual-wavelength fiber laser emitting synchronized pulses in the 2 μm spectral range. Owing to the use of a Tm-doped rod-type fully aperiodic large pitch fiber, together with an acousto-optic modulator and two volume Bragg gratings (VBGs), the wavelength separation was shown to be continuously tunable from 1 to 120 nm ($\sim 0.1-10\mathrm{THz}$). A peak power higher than 8 kW was demonstrated over the whole tuning range for a repetition rate (RR) of 1 KHz and a 26 ns pulse duration. The RR was modulated from 1 to 30 kHz, and the laser pulse duration measured between 23 ns and 130 ns, depending on the RR and the wavelength separation.

© 2019 Optical Society of America

Tunable passively Q-switched Dy³⁺-doped fiber laser from 2.71 to 3.08  μm using PbS nanoparticles

Hongyu Luo, Jianfeng Li, Ying Gao, Yao Xu, Xiaohui Li, and Yong Liu
Opt. Lett. 44(9) 2322-2325 (2019)

6.5 W ZnGeP₂ OPO directly pumped by a Q-switched Tm³⁺-doped single-oscillator fiber laser

Christelle Kieleck, Antoine Berrou, Brenda Donelan, Benoit Cadier, Thierry Robin, and Marc Eichhorn
Opt. Lett. 40(6) 1101-1104 (2015)

Dual-wavelength injection-seeded Q-switched Ho:YLF laser for CO₂ differential absorption lidar application

Yunpeng Wang, Tongyu Dai, Xinyu Liu, Youlun Ju, and Baoquan Yao
Opt. Lett. 44(24) 6049-6052 (2019)

High-pulse-energy actively Q-switched Tm³⁺-doped silica 2 μm fiber laser pumped at 792 nm

Marc Eichhorn and Stuart D. Jackson
Opt. Lett. 32(19) 2780-2782 (2007)

High-peak-power operation of a Q-switched Tm³⁺-doped silica fiber laser operating near 2 µm

Ashraf F. El-Sherif and Terence A. King
Opt. Lett. 28(1) 22-24 (2003)