Temperature characteristics analysis of a Tm3+-doped heterogeneous helical cladding fiber amplifier

• Published in: Applied physics. B, Lasers and optics Vol. 128; no. 12
• Main Authors: Shen, Xiao, Zhou, Jianhong, Yang, Guangli, Jiang, Jian, Wei, Wei
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2022; Springer Nature B.V
• Subjects: Air cooling; Amplifiers; Applied physics; Cladding; Doped fibers; Engineering; Lasers; Liquid cooling; Optical Devices; Optics; Photonics; Physical Chemistry; Physics; Physics and Astronomy; Quantum Optics; Temperature distribution; Temperature effects
• ISSN: 0946-2171; 1432-0649
• DOI: 10.1007/s00340-022-07936-2

Tm 3+ -doped fiber amplifiers have been widely and deeply studied because of its important application values. A novel type of Tm 3+ -doped large mode area heterogeneous helical cladding fiber was proposed by our group recently. To expand the application potential of the fiber, in this paper, based on rate equations of the fiber amplifier and the theory of thermal effect, the distribution characteristics of pump light and signal light are simulated, according to three different schemes of forward pumped, backward pumped and dual-end pumped for the first time. Furtherly, the three-dimensional temperature distribution characteristics of the fiber are studied under three different cooling conditions: air cooling, water cooling and natural cooling. When the fiber temperature is limited in 200 °C, the signal light power can reach 19.6 W (99.5 W) under air (water) cooling condition. The temperature characteristics research results provide theoretical support for the practical application of the novel fiber.