Abstract

We demonstrate continuous-wave operation of an all-fiber thulium-holmium codoped laser operating at a wavelength of 1706.3 nm. To realize laser operation in the short-wavelength region of the emission-band edge of thulium in silica fiber, we employ fiber Bragg gratings having resonant reflection at a wavelength around 1700 nm as a wavelength-selective mirror in an all-fiber cavity scheme. We first examine the performance of the laser by adjusting the central wavelength of the in-band pump source. Although a pump source possessing a longer wavelength is observed to provide reduced laser threshold power and increased slope efficiency, because of the characteristics of spectral response in the gain fiber, we find that the optimal pump wavelength is 1565 nm to obtain maximum laser output power for a given system. We further explore the properties of the laser by varying the fiber gain length from 1 m to 1.4 m, for the purpose of power scaling. It is revealed that the laser shows optimal performance in terms of output power and slope efficiency at a gain length of 1.3 m, where we obtain a maximum output power of 249 mW for an applied pump power of 2.1 W. A maximum slope efficiency is also estimated to be 23% under these conditions.

© 2018 Optical Society of Korea

Tunable dissipative soliton Tm-doped fiber laser operating from 1700 nm to 1900 nm

Xinyang Liu, Jayanta K. Sahu, and Regina Gumenyuk
Opt. Lett. 48(3) 612-615 (2023)

High-power continuous-wave Tm³⁺:Ho³⁺-codoped fiber laser operation from 2.1 µm to 2.2 µm

Patrick Forster, Clément Romano, Julian Schneider, Marc Eichhorn, and Christelle Kieleck
Opt. Lett. 47(10) 2542-2545 (2022)

1.7 µm gain-switched and mode-locked hybrid Tm–Ho codoped fiber laser signal generation and optimization

Qi Li, Peng Zhang, Yunlong Fan, Yuzhu Ning, Jia Wei, and Shoufeng Tong
Appl. Opt. 61(2) 455-462 (2022)

Ultra-wideband all-fiber tunable Tm/Ho-co-doped laser at 2 μm

Guanghui Xue, Bin Zhang, Ke Yin, Weiqiang Yang, and Jing Hou
Opt. Express 22(21) 25976-25983 (2014)

Tm³⁺/Ho³⁺ codoped tellurite fiber laser

Yuen Tsang, Billy Richards, David Binks, Joris Lousteau, and Animesh Jha
Opt. Lett. 33(11) 1282-1284 (2008)