Experimental and Modeled Output Characteristics of a Compact, Passively Q-Switched Tm:YLF Laser

被引：0
|
作者：
Chinn, Stephen R. [1 ]
Goldberg, Lew [2 ]
King, Vernon [2 ]
Leach, Jeffrey H. [2 ]
Hays, Alan D. [2 ]
Cole, Brian [2 ]
机构：
[1] Fibertek Inc, Herndon, VA 20107 USA
[2] US Army, Combat Capabil Dev Command, Res & Technol Integrat Directorate, Ft Belvoir, VA 22060 USA
来源：
IEEE JOURNAL OF QUANTUM ELECTRONICS | 2023年 / 59卷 / 03期
关键词：
Solid state lasers; 2 mu m laser; thulium; Tm:YLF; Q-switching; passive Q-switch; saturable absorber; Cr:ZnS; VBG; BPM; FD-BPM; PUMPED YTTERBIUM LASERS; TMYAP LASER; YAP;
D O I：
10.1109/JQE.2023.3260190
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We measure the output characteristics of a compact, laser diode end-pumped Tm:YLF laser, operated in continuous wave (CW) mode, or passively Q-switched (PQS) using various Cr2+:ZnS saturable absorbers. A numerical Finite-Difference Beam Propagation Method (FD-BPM) is developed and used to model the laser CW and pulsed performance. Good agreement between the experiment and simulated output is demonstrated. The 39 mm-long laser resonator utilizes a 20.2 mm-long Tm:YLF crystal, a 1908 nm volume Bragg grating (VBG) reflector to restrict the emission wavelength, and an intra-cavity negative lens to reduce the energy fluence in the saturable absorber. A laser utilizing a Cr2+:ZnS saturable absorber with 91.9% unsaturated transmission generates 9.8 mJ PQS pulses with 8.7 ns full-width-half-maximum (FWHM) pulse duration. Maximum average output powers of 6.1 W and 6.5 W are generated in PQS and CW operation, respectively.
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页数：8
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