Abstract

In this article, for the first time, an efficient multi-wavelength fiber laser based on a Tm:Er:Yb:Ho co-doped germanate glass, optically pumped at 980 nm wavelength and simultaneously emitting at 1550 nm, 1800 nm and 2050 nm wavelengths, is designed and optimized. An exhaustive model, taking into account the energy transfer phenomena between different rare earths, is developed. The device behavior is investigated by means of several parametric sweeps with respect to the input pump power, the fiber length, the dopant concentrations and the output mirrors reflectivities. Four optimal concentrations have been found by means of a home-made computer code based on particle swarm optimization (PSO) approach, allowing a global solution search. These concentrations allow levels of output powers very close to each other, equal to 20 mW $\pm$ 0.1 $\%$ at 1550 nm, 1800 nm and 2050 nm, respectively. These results predict the possibility of tailoring the dopant concentrations in order to construct broadband optical sources with similar emission powers at multiple wavelengths and broadband amplifiers.

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)

Spectroscopic analysis and laser simulations of Yb³⁺/Ho³⁺ co-doped lead-germanate glass

Mamoona Khalid, D. G. Lancaster, and Heike Ebendorff-Heidepriem
Opt. Mater. Express 10(11) 2819-2833 (2020)

Tm³⁺/Ho³⁺ co-doped germanate glass and double-clad optical fiber for broadband emission and lasing above 2 µm

M. Kochanowicz, J. Zmojda, P. Miluski, A. Baranowska, M. Leich, A. Schwuchow, M. Jäger, M. Kuwik, J. Pisarska, W. A. Pisarski, and D. Dorosz
Opt. Mater. Express 9(3) 1450-1458 (2019)

Broadband 1.5-2.1 µm emission in gallo-germanate dual-core optical fiber co-doped with Er³⁺ and Yb³⁺/Tm³⁺/Ho³⁺

Jakub Markiewicz, Marcin Kochanowicz, Tomasz Ragiń, Karolina Sadowska, Jacek Żmojda, Piotr Miluski, Jan Dorosz, Marta Kuwik, Wojciech A. Pisarski, Joanna Pisarska, Magdalena Leśniak, and Dominik Dorosz
Opt. Express 31(18) 28850-28858 (2023)

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)