Thermal modeling of an external cavity diamond Raman laser. (December 2022)

• Record Type: Journal Article
• Authors: Ding, Jie; Li, Yulan; Chen, Hui; Cai, Yunpeng; Bai, Zhenxu; Qi, Yaoyao; Yan, Bingzheng; Wang, Yulei; Lu, Zhiwei
• Is Part Of: Optics & laser technology. Volume 156(2022)
• Publication Date: 2022-12
• Subjects: Diamond Raman laser -- Temperature -- Thermal stress -- Thermal deformation; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2022.108578
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: The theoretical model of diamond temperature field is established according to the initial boundary conditions, Gaussian pump distribution and heat transfer mode. Based on the theoretical model, the temperature gradient, temperature distribution, stress distribution and thermal deformation distribution of diamond are simulated and calculated. Through the design and construction of the diamond Raman laser, the output of 1240 nm with132 W is realized. The temperature difference between the diamond and the environment is 7 K, which is in accordance with the theoretical simulation result of 7.15 K. Abstract: Thermal effects are some of the most significant factors limiting power scalability and beam quality of laser systems. In this work we examine both theoretically and experimentally, the degree by which thermal loading impacts the performance of an external cavity diamond Raman laser (DRL). Specifically, we formulate a model to study the temperature, thermal stress and thermal deformation that occurs within a diamond Raman medium in response to increasing levels of laser pumping. Experimentally, we demonstrate a DRL generating Stokes emission at 1240 nm with output power of up to 132 W and output beam quality of M 2 = 1.1.