Journal
QUANTUM ELECTRONICS
Volume 51, Issue 2, Pages 149-152Publisher
TURPION LTD
DOI: 10.1070/QEL17434
Keywords
Q-switching; Nd:LGGG disordered crystal; tunable laser
Funding
- Shandong Provincial Natural Science Foundation of China [ZR2020MF102, ZR2017MA040]
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The laser characteristics of continuous-wave and passively Q-switched Nd: LGGG lasers were studied based on the F-4(3/2) -> I-4(13/2) transition, including lasing spectra, thermal optical coefficient, and frequency tuning. The maximum output power, pulse duration, and pulse energy varied between the cw and Q-switching regimes, demonstrating the versatility of Nd: LGGG lasers in different operating conditions.
Laser characteristics of continuous-wave (cw) and passively Q-switched Nd: LGGG lasers based on the F-4(3/2) -> I-4(13/2) transition of an neodymium ion are investigated. The lasing spectra of the cw and the Q-switching regimes are studied in detail. The thermal optical coefficient for the Nd:LGGG crystal at a wavelength of 1.33 mu m is estimated to be 15.3 x 10(-6) K-1. By inserting a quartz plate at the Brewster angle, the frequency of the Nd: LGGG laser is tuned. In the cw regime, the maximum output power at an incident pump power of 7.09 W is 802 mW and a slope efficiency is 13.2%. In the Q-switching regime, a minimum pulse duration of 9.75 ns is obtained with an output power of 176 mW and a repetition rate of 8 kHz. The maximum pulse energy and the highest peak power are 25.4 mu J and 2.4 kW, respectively.
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