Continuous wave and active Q-switched operation of Watt-level LED-pumped two-rod Nd,Ce:YAG laser

doi:10.1088/1674-1056/ad34c9

Abstract A high-performance LED-side-pumped two-rod Nd,Ce:YAG laser with continuous-wave (CW) and acousto-optical (A-O) $Q$-switched operation is demonstrated in this work. A symmetrically shaped flat-flat cavity with two identical LED-side-pumped laser modules is employed for power scalability. In the CW regime, the maximum output average power of laser at 1064 nm is 4.41 W, corresponding to a maximum optical conversion efficiency of 5.3% and a slope efficiency is 12.4%. In the active $Q$-switched regime, the pulse energy of laser reaches as high as 0.89 mJ at a repetition rate of 800 Hz with a pulse width of 457.2 ns, the corresponding highest peak output power is 1.94 kW and the $M^{2}$ factor is measured to be about 8.8. To the best of the authors' knowledge, this is the first demonstration and the highest performance of a CW LED-side-pumped two-rod laser Nd,Ce:YAG with Watt-level output reported so far.

Keywords: Watt-level LED-pumped CW Nd,Ce:YAG actively $Q$-switched operation

Received: 29 January 2024
Revised: 10 March 2024
Accepted manuscript online: 18 March 2024

PACS:	42.55.-f	(Lasers)
	42.55.Ye	(Raman lasers)
	42.55.Xi	(Diode-pumped lasers)
	42.60.Gd	(Q-switching)

Fund: Project supported by the Fund from Nanjing University of Posts and Telecommunications, China (Grant Nos. JUH219002 and JUH219007) and by the Key Research and Development Program of Shandong Province, China (Grant No. 2021CXGC010202).

Corresponding Authors: Jian-Ping Shen
E-mail: jianpingshen@njupt.edu.cn

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Jian-Ping Shen(沈建平), Peng Lu(芦鹏), Shao-Cong Xu(徐少聪), Rong-Rong Jiang(江容容), Yang Chen(陈阳), Liang Chen(陈亮), and Feng-Yang Xing(邢凤阳) Continuous wave and active Q-switched operation of Watt-level LED-pumped two-rod Nd,Ce:YAG laser 2024 Chin. Phys. B 33 074207

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Continuous wave and active Q-switched operation of Watt-level LED-pumped two-rod Nd,Ce:YAG laser

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