Abstract

We report a silicate-clad heavily Tm³⁺-doped germanate core multimaterial fiber that is successfully drawn by using a rod-in-tube method. This new fiber has a high gain per unit length of 6.11 dB/cm at 1.95 µm, which is, to the best of the authors’ knowledge, the highest gain per unit length reported so far for Tm³⁺-doped glass fibers. By virtue of this high-gain glass fiber, an all-fiber-integrated passively mode-locked fiber laser with a fundamental repetition rate up to 4.3 GHz is demonstrated. Remarkably, the generated pulse operating at 1968 nm exhibits a signal-to-noise ratio of >76 dB in the radio-frequency domain. These results suggest that the silicate-clad heavily Tm³⁺-doped germanate core multimaterial fiber can act as a key building block for high repetition rate mode-locked fiber lasers at 2 µm.

© 2022 Optica Publishing Group

Silicate-clad heavily Yb³⁺ doped phosphate core multimaterial fiber with a high gain per unit length for mode-locked fiber laser applications

Guowu Tang, Yingtao Zhang, Dongliang Yang, Wei Lin, Wenhua Huang, Tu Le, Fan Wu, Na Yan, Qi Qian, Xiaoming Wei, and Zhongmin Yang
Opt. Lett. 46(9) 2027-2030 (2021)

Broadband high-gain Tm³⁺/Ho³⁺ co-doped germanate glass multimaterial fiber for fiber lasers above 2 µm

Guowu Tang, Zhaoheng Liang, Wenhua Huang, Dongliang Yang, Le Tu, Wei Lin, Xiangyang Song, Dongdan Chen, Qi Qian, Xiaoming Wei, and Zhongmin Yang
Opt. Express 30(18) 32693-32703 (2022)

Controllable structural tailoring for enhanced ∼2 µm emission in heavily Tm³⁺-doped germanate glasses

Le Tu, Guowu Tang, Qi Qian, and Zhongmin Yang
Opt. Lett. 46(2) 310-313 (2021)

Tm:YAG ceramic derived multimaterial fiber with high gain per unit length for 2 µm laser applications

Guoquan Qian, Wenlong Wang, Guowu Tang, Xianchao Guan, Wei Lin, Qi Qian, Dongdan Chen, Changsheng Yang, Jiantao Liu, Guiyao Zhou, Shanhui Xu, and Zhongmin Yang
Opt. Lett. 45(5) 1047-1050 (2020)

Low-noise mode-locking in a GHz repetition rate Tm³⁺-doped fiber laser

Zhaoheng Liang, Wei Lin, Wenlong Wang, Xu Hu, Minjie Pan, Yiheng Fan, Chiyi Wei, Luyi Wang, Guowu Tang, Xiaoming Wei, and Zhongmin Yang
Opt. Lett. 49(2) 403-406 (2024)