Abstract

Er³⁺-doped glass and fiber are very attractive for near-infrared (NIR) lasers and photonic applications. In this work, the full width at half maximum (FWHM) of NIR fluorescence emission of the Er³⁺-doped germanate glass can be broadened from 72 to 99 nm when Al₂O₃ was added. In addition, the spectroscopic properties, including absorption and emission spectra, Judd–Ofelt intensity parameters, absorption and emission cross sections, gain coefficient, and fluorescence lifetime, of the Al₂O₃-modified germanate glass were systematically investigated. What is more, silicate-clad heavily Er³⁺-doped germanate core multimaterial fibers were successfully drawn by a rod-in-tube method. Notably, broadband NIR amplified spontaneous emission (ASE) with an FWHM of 120 nm was achieved in this new fiber. To the best of our knowledge, this is the largest FWHM reported for Er³⁺-doped germanate glass fibers. These results suggest that the as-drawn Er³⁺-doped germanate glass fiber with superior performances is a promising candidate for broadband optical amplification.

© 2023 Optica Publishing Group

Broadband 1.0 µm emission in Nd³⁺/Yb³⁺ co-doped phosphate glasses and fibers for photonic applications

Guowu Tang, Xiangyang Song, Dongliang Yang, Minbo Wu, Fangteng Zhang, Weiren Zhao, Qi Qian, and Zhongmin Yang
Opt. Lett. 48(22) 5879-5882 (2023)

Broadband 2.7 μm amplified spontaneous emission of Er³⁺ doped tellurite fibers for mid-infrared laser applications

W. C. Wang, J. Yuan, L. X. Li, D. D. Chen, Q. Qian, and Q. Y. Zhang
Opt. Mater. Express 5(12) 2964-2977 (2015)

4.3 GHz fundamental repetition rate passively mode-locked fiber laser using a silicate-clad heavily Tm³⁺-doped germanate core multimaterial fiber

Guowu Tang, Zhaoheng Liang, Wenhua Huang, Dongliang Yang, Wei Lin, Le Tu, Dongdan Chen, Qi Qian, Xiaoming Wei, and Zhongmin Yang
Opt. Lett. 47(3) 682-685 (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)

Ultra-broadband emission in Er³⁺/Tm³⁺/Ho³⁺ triply-doped germanate glass and double-clad optical fiber

M. Kochanowicz, J. Zmojda, P. Miluski, A. Baranowska, K. Sadowska, M. Kuwik, J. Pisarska, W. A. Pisarski, and D. Dorosz
Opt. Mater. Express 12(6) 2332-2342 (2022)