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Manuscript ID : JOPN-2304-1288 (R4) Visit : 98 Page: 68 - 80

10.30495/jopn.2023.31798.1288

20.1001.1.24237361.2023.8.2.5.3

Article Type: Original Research

Influence of Pump Pulse Duration on the Output Performance of a LED-Pumped Nd:YAG Laser

Subject Areas : Journal of Optoelectronical Nanostructures

Amir Noferesti 1 , Masoud Kavosh Tehrani 2 , Abbas Maleki 3

1 - Faculty of applied science, Malek Ashtar University of Technology, Iran.
2 - Faculty of applied science, Malek Ashtar University of Technology, Iran.
3 - Faculty of applied science, Malek Ashtar University of Technology, Iran.

Received: 2023-04-23 Accepted : 2023-06-05 Published : 2023-05-01

Keywords: Light Emitting Diode, Nd:YAG Rod, Pump Pulse Duration, PQS(Passive Q-Switch QCW(Quasi-Continues Wave),

Abstract :

Abstract:
In this paper, we performed an experimental study of a LED-pumped Nd:YAG laser that works in QCW and Q-switch modes. We examined how the pump pulse duration affects the laser output. The laser rod was a Nd:YAG crystal with a diameter of 7 mm and a length of 95 mm, side-pumped by 30 LED arrays, each with 18 single dies at 810 nm. The maximum output energy at 1064 nm was 10.5 mJ in the QCW mode, with a pump energy of 81 mJ (230 µs pulses at 1 Hz). The optical conversion efficiency and the slope efficiency were 12.5% and 18%, respectively. In the PQS mode, the output energy was 250 µJ, with a pulse width of 190 ns (FWHM), corresponding to a peak power of 1.31 kW. The beam divergence was 0.3 mrad with TEM00 mode. This LED-pumped Q-switched Nd:YAG laser can be used for laser range finder applications.

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