Wavelength tunable all-polarization-maintaining fiber laser at 2 μm

• Published in: Optics and laser technology Vol. 168; p. 109850
• Main Authors: Zhang, Yunhong, Zheng, Yi, Su, Xinyang, Zhang, Huaiwei, Sun, Tianran, Cui, Mengdi, Peng, Jiying
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2024
• Subjects: All-polarization-maintaining; Noise-like pulse; Thulium-doped fiber laser; Wavelength Tunable; All-polarization-maintaining; Noise-like pulse; Thulium-doped fiber laser; Wavelength Tunable
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2023.109850

•To the best of our knowledge, this is the first report of wavelength tunable NLP output in the all-PM thulium-doped fiber laser.•A temperature-controlled polarization-maintaining fiber filter is proposed, which can be realized not only by co-splicing the polarization-maintaining dispersion compensation fiber and normal polarization-maintaining fiber but also by simply splicing the normal polarization-maintaining fiber with a rotation angle.•The wavelength tunable range of 32.4 nm from 1910.4 nm to 1942.8 nm is realized in the noise-like pulse regime from an all-PM thulium-doped fiber laser.•The wavelength tunable range of 26.6 nm from 1937.7 nm to 1964.3 nm is realized in the continuous-wave regime from an all-PM thulium-doped fiber laser. In this paper, we present both wavelength tunable noise-like pulse (NLP) and continuous-wave (CW) generation in all-polarization-maintaining (all-PM) thulium-doped fiber lasers. By introducing a piece of polarization-maintaining fiber (PMF) whose birefringence changes with temperature in the all-PM thulium-doped fiber laser, a wavelength tunable range of 32.4 nm from 1910.4 nm to 1942.8 nm is realized in NLP regime, and a wavelength tunable range of 26.6 nm from 1937.7 nm to 1964.3 nm is realized in CW regime. The designed laser cavity is configured with all-PM fiber scheme and the special PMF is temperature-controlled, thus the laser owns high environmental stability and repeatability. To the best of our knowledge, this is the first report of wavelength tunable NLP output in the all-PM thulium-doped fiber laser.