High power and excellent beam quality rod Yb: YAG regenerative amplifier

This paper demonstrates a laser diode double-ended pumped Yb: YAG rod regenerative amplifier (RA) with an average power of 37 W, which substantially exceeds the performance of previously reported bulk Yb: YAG medium RAs. Compared to other bulk Yb: YAG medium RAs, we have introduced several enhanceme...

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Bibliographic Details
Published inApplied physics. B, Lasers and optics Vol. 130; no. 6
Main Authors Luo, Guangxin, Song, Jiajun, Peng, Yujie, Liu, Yinfei, Shen, Liya, Sun, Jianyu, Leng, Yuxin
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2024
Springer Nature B.V
Subjects
Amplifiers
Engineering
Heat sinks
Lasers
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Pulse repetition rate
Quantum Optics
Semiconductor lasers
Temperature effects
Thermal management
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Summary:This paper demonstrates a laser diode double-ended pumped Yb: YAG rod regenerative amplifier (RA) with an average power of 37 W, which substantially exceeds the performance of previously reported bulk Yb: YAG medium RAs. Compared to other bulk Yb: YAG medium RAs, we have introduced several enhancements in thermal management, such as employing a double-ended pump to reduce the temperature gradient inside the crystal, and the cooling efficiency is significantly enhanced by designed heat sink. As a result, the thermal effect is effectively suppressed. The system attains high average output power and power stability (RMS = 0.56%) at a pulse repetition rate of 400 kHz. In addition, the output beam maintains excellent quality even under varying high pump powers, demonstrating an M 2 consistently below 1.1.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-024-08223-y