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Thermal lens determination of LD end-pumped solid-state laser with stable resonator by slit scanning method |
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| Authors: | Jiaan Zheng Shengzhi Zhao Lei Chen |
| Affiliation: | 1. Department of oncology, The Second Hospital of Shandong University, Jinan, 250033, China;2. Shandong provincial key laboratory of wireless communication technologies, School of Information Science and Engineering, Shandong University, Jinan, 250100, China;3. Medical Center, Columbia University, New York, USA;4. School of Computer Science & Software Engineering, Shenzhen University, Shenzhen, 518000, China;5. Department of Hematology, The Second Hospital of Shandong University, Jinan, 250033, China;1. Institute of Applied Physics and Computational Mathematics, Beijing 100094, China;2. Institute of Applied Electronics, CAEP, Mianyang, Sichuan 621900, China;3. Key Laboratory of Science and Technology on High Energy Laser, CAEP, Mianyang 621900, China |
| Abstract: | A simple method to determine the thermal focal length of LD end-pumped solid-state laser with stable resonator is presented. The M2 factor describing the quality of the beam can be obtained by scanning a slit through the multi-mode Gaussian beam field. The waist width of the beam and the corresponding TEM00 under the same parameters of laser are then deduced through the law of multi-mode Gaussian beam propagation. Based on the standard matrix theory of stable resonator, the thermal focal length of the gain medium can be easily achieved. To show the application of this approach, the thermal focal length of an LD pumped Nd:YVO4 laser is measured and the experimental results are in agreement with the theoretical prediction. |
| Keywords: | End-pumped laser Slit scanning method M2 factor Thermal lens |
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