High single-pulse energy passively <i>Q</i>-switched laser based on Yb,Gd:SrF<sub>2</sub> crystal

Mengfei Zhao; Cong Wang; Qianqian Hao; Zhengting Zou; Jie Liu; Xiuwei Fan; Liangbi Su

doi:10.3788/COL202018.101401

Chinese Optics Letters, Volume. 18, Issue 10, 101401(2020)

High single-pulse energy passively Q-switched laser based on Yb,Gd:SrF₂ crystal

Mengfei Zhao¹, Cong Wang¹, Qianqian Hao¹, Zhengting Zou^2,3, Jie Liu^1、*, Xiuwei Fan^1、**, and Liangbi Su^2,3

¹Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China

²CAS Key Laboratory of Transparent and Opto-functional Inorganic Materials, Synthetic Single Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China

³State Ley Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China

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Figures & Tables(9)

Fig. 1. Absorption cross section and emission cross section of the $Yb, Gd : {SrF}_{2}$ crystal.

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Fig. 2. Schematic setup of the LD pumped $Yb, Gd : {SrF}_{2}$ laser.

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Fig. 3. CW output power and Q-switched average output power versus absorbed pump power.

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Fig. 4. Pulse width and pulse repetition rate versus absorbed pump power.

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Fig. 5. Q-switched pulse sequences measured at different time scales with OC transmittance of (a) $T = 2 %$ and (b) $T = 5 %$ .

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Fig. 6. Single-pulse energy and peak power versus absorbed pump power.

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Fig. 7. (a) Spectra of CW and Q-switched lasers ( $T = 2 %$ ); (b) the beam quality of the Q-switched laser ( $T = 2 %$ ); (c) the spatial beam profile of the Q-switched laser ( $T = 2 %$ ).

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Table 1. Results of the Q-switched $Yb, Gd : {SrF}_{2}$ Laser ( $Absorbed Pump Power = 4.602 W$ )
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Table 1. Results of the Q-switched $Yb, Gd : {SrF}_{2}$ Laser ( $Absorbed Pump Power = 4.602 W$ )
Transmission of OC $T = 2 %$ $T = 5 %$
Maximum average output power 460 mW 495 mW
Repetition rate 1.717 kHz 1.238 kHz
Shortest pulse width 210 ns 233 ns
Single-pulse energy 270 µJ 400 µJ
Peak power 1.273 kW 1.714 kW

Table 2. Q-switched Laser Performance Comparisons of $Yb, Gd : {SrF}_{2}$ and Other ${Yb}^{3 +}$ -doping Crystals

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Table 2. Q-switched Laser Performance Comparisons of $Yb, Gd : {SrF}_{2}$ and Other ${Yb}^{3 +}$ -doping Crystals

Crystal	SA	Single-Pulse Energy (μJ)	Pulse Width	Reference
Yb:YAG	${Cr}^{4 +} : YAG$	3.2	350 ns	[29]
Yb:YAG	SESAM	1.1	530 ps	[30]
Yb:YCOB	GaAs	40	153 ns	[31]
Yb:CNGS	${Cr}^{4 +} : YAG$	13.3	11.1 ns	[32]
Yb:CNGS	$V^{3 +} : YAG$	62.2	4.4 ns	[32]
$Yb, Gd : {SrF}_{2}$	${Cr}^{4 +} : YAG$	400	233 ns	This work

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Mengfei Zhao, Cong Wang, Qianqian Hao, Zhengting Zou, Jie Liu, Xiuwei Fan, Liangbi Su, "High single-pulse energy passively Q-switched laser based on Yb,Gd:SrF₂ crystal," Chin. Opt. Lett. 18, 101401 (2020)

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Paper Information

Category: Lasers and Laser Optics

Received: Apr. 14, 2020

Accepted: Jun. 1, 2020

Published Online: Aug. 12, 2020

The Author Email: Jie Liu (jieliu@sdnu.edu.cn), Xiuwei Fan (xwfan@sdnu.edu.cn)

DOI:10.3788/COL202018.101401

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Results of the Q-switched Yb,Gd:SrF2 Laser (Absorbed Pump Power=4.602 W)

Table 1. Results of the Q-switched Yb,Gd:SrF2 Laser (Absorbed Pump Power=4.602 W)

Table 2. Q-switched Laser Performance Comparisons of Yb,Gd:SrF2 and Other Yb3+-doping Crystals

Table 2. Q-switched Laser Performance Comparisons of Yb,Gd:SrF2 and Other Yb3+-doping Crystals

Table 1. Results of the Q-switched $Yb, Gd : {SrF}_{2}$ Laser ( $Absorbed Pump Power = 4.602 W$ )

Table 1. Results of the Q-switched $Yb, Gd : {SrF}_{2}$ Laser ( $Absorbed Pump Power = 4.602 W$ )

Table 2. Q-switched Laser Performance Comparisons of $Yb, Gd : {SrF}_{2}$ and Other ${Yb}^{3 +}$ -doping Crystals

Table 2. Q-switched Laser Performance Comparisons of $Yb, Gd : {SrF}_{2}$ and Other ${Yb}^{3 +}$ -doping Crystals