Dual-wavelength thulium/holmium-doped fiber laser generation in 2 µm region with high side-mode suppression ratio

• Main Authors: Lau, Kuen Yao, Zainol Abidin, Nadiah Husseini, Cholan, Noran Azizan, Abas, Ahmad Fauzi, Alresheedi, Mohammed Thamer, Mahdi, Mohd Adzir
• Format: Article
• Language: English
• Published: IOP Publishing 2019
• Online Access: http://psasir.upm.edu.my/id/eprint/79455/1/Dual-wavelength%20thulium.pdf; http://psasir.upm.edu.my/id/eprint/79455/; https://iopscience.iop.org/article/10.1088/2040-8986/ab05af

We demonstrate a dual-wavelength laser with emission in the 2 μm wavelength region using a thulium/holmium co-doped fiber and a non-adiabatic tapered fiber as a comb filter. The configuration employed a backward pumping scheme and dual-wavelength laser was generated at 2023.53 and 2032.82 nm. The side-mode suppression ratio (SMSR) is more than 44 dB with overall good stability performance. The proposed configuration presents a simple yet practical scheme of generating 2 μm dual-wavelength laser with good SMSR. This investigation may offer a more efficient yet eye safe dual-wavelength related applications for end users.