Eleven-wavelength-switchable thulium-doped fiber laser with a sandwich four-mode fiber Mach–Zehnder interferometer

Ying Guo; Ting Feng; Li Yin; Fengping Yan; Haoyu Tan; Qi Qin; Wentao Jin; Hui Qi; Shaochun Fu; Haoxian Zeng

Results in Physics (Apr 2024)

Eleven-wavelength-switchable thulium-doped fiber laser with a sandwich four-mode fiber Mach–Zehnder interferometer

Ying Guo,
Ting Feng,
Li Yin,
Fengping Yan,
Haoyu Tan,
Qi Qin,
Wentao Jin,
Hui Qi,
Shaochun Fu,
Haoxian Zeng

Affiliations

Ying Guo: Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, and College of Physics and Optoelectronic Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China; Corresponding authors.
Ting Feng: College of Information Science and Engineering, Northeastern University, Shenyang 110819, China; Corresponding authors.
Li Yin: Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, and College of Physics and Optoelectronic Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China; Corresponding authors.
Fengping Yan: School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China
Haoyu Tan: School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China
Qi Qin: School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China
Wentao Jin: Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, and College of Physics and Optoelectronic Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China
Hui Qi: Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, and College of Physics and Optoelectronic Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China
Shaochun Fu: Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, and College of Physics and Optoelectronic Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China
Haoxian Zeng: Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, and College of Physics and Optoelectronic Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China

Journal volume & issue: Vol. 59
p. 107598

Abstract

Read online

An eleven-wavelength-switchable thulium-doped fiber laser was proposed and demonstrated, incorporating an improved geta-shaped cavity providing bidirectional amplification, and a sandwich four-mode fiber Mach–Zehnder interferometer filter with curvature sensitivity. The filter was fabricated by splicing a segment of four-mode fiber (FMF) between two segments of a no-core fiber (NCF), with two segments of a single mode fiber (SMF) fused outside the two NCFs, and the structural order was SMF-NCF-FMF-NCF-SMF (SNFNS). The mode interference of the SNFNS filter was investigated theoretically in detail. The curvature characteristic was measured experimentally, and the maximum curvature sensitivity of the filter was 5.83 dB/m−1 in the ranges of 1.51 ∼ 2.26 m−1. By adjusting the curvature of the filter and polarization controllers, switchable eleven single-wavelength output can be obtained. The stability of the single-wavelength output was monitored with the fluctuations of the center wavelength and output power being less than 0.05 nm and 0.90 dB, respectively. Additionally, a slope efficiency of 9.797 % was achieved using a bidirectional amplifier configuration. The proposed laser may be suitable for mode-division multiplexing systems and optical sensor applications.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

About the journal