| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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An LED-Side-Pumped Intracavity Frequency-Doubled Nd,Ce:YAG Laser Producing a 2 W Q-Switched Red Beam |
| Jianping Shen1*, Shaocong Xu1*, Peng LU1, Rongrong Jiang1, Wei Wang2, Siwei Zhang2, Fengyang Xing2, Yang Chen1, and Liang Chen1 |
1College of Electronic and Optical Engineering & College of Flexible Electronics, Nanjing University of Posts and Telecommunications, Nanjing 210046, China
2Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266000, China
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Jianping Shen, Shaocong Xu, Peng LU et al 2024 Chin. Phys. Lett. 41 034201 |
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Abstract We report a high-average-power acousto-optic (AO) Q-switched intracavity frequency-doubled red laser based on a high-efficiency light-emitting-diode (LED) pumped two-rod Nd,Ce:YAG laser module. Under quasi-continuous wave operation conditions, a maximum output power of 1319.08 nm wavelength was achieved at 11.26 W at a repetition rate of 100 Hz, corresponding to a maximum optical efficiency of 13.9% and a slope efficiency of 17.9%. In the active Q-switched regime, the pulse energy of the laser was as high as 800 µJ at a repetition rate of 10 kHz with a pulse width of 1.5 µs. Under non-critical phase-matched KTP crystal conditions, an average power of 2.03 W of 658.66 nm through intracavity frequency-doubling was obtained at a repetition frequency of 10 kHz with a duration of 1.3 µs, and the $M^{2}$ factor was measured to be about 5.8. To the best of our knowledge, this is the highest average power of an LED-pumped AO Q-switched 1319 nm laser and intracavity frequency-doubled red laser reported to date.
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Received: 29 December 2023
Published: 25 March 2024
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