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:doi:10.3788/COL202018.101401

Chinese Optics Letters, 2020, 18 (10): 101401, Published Online: Aug. 12, 2020

High single-pulse energy passively Q-switched laser based on Yb,Gd:SrF₂ crystal Download： 686次

Mengfei Zhao ¹Cong Wang ¹Qianqian Hao ¹Zhengting Zou ^2,3Jie Liu ^1,*Xiuwei Fan ^1,**Liangbi Su ^2,3

Author Affiliations

¹ Shandong 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

² CAS 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

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

Figures & Tables

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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Table1. 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

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Table2. 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[J]. Chinese Optics Letters, 2020, 18(10): 101401.

High single-pulse energy passively Q-switched laser based on Yb,Gd:SrF₂ crystal Download： 686次

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

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

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

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

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

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

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 ( $T = 2 %$ ).

Table1. Results of the Q-switched $Yb, Gd : {SrF}_{2}$ Laser ( $Absorbed Pump Power = 4.602 W$ )

Table2. Q-switched Laser Performance Comparisons of $Yb, Gd : {SrF}_{2}$ and Other ${Yb}^{3 +}$ -doping Crystals

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High single-pulse energy passively Q-switched laser based on Yb,Gd:SrF2 crystal Download： 686次

Fig. 1. Absorption cross section and emission cross section of the Yb,Gd:SrF2 crystal.

Fig. 2. Schematic setup of the LD pumped Yb,Gd:SrF2 laser.

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

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

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

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

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%).

Table1. Results of the Q-switched Yb,Gd:SrF2 Laser (Absorbed Pump Power=4.602 W)

Table2. Q-switched Laser Performance Comparisons of Yb,Gd:SrF2 and Other Yb3+-doping Crystals

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High single-pulse energy passively Q-switched laser based on Yb,Gd:SrF₂ crystal Download： 686次

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

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

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

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 ( $T = 2 %$ ).

Table1. Results of the Q-switched $Yb, Gd : {SrF}_{2}$ Laser ( $Absorbed Pump Power = 4.602 W$ )

Table2. Q-switched Laser Performance Comparisons of $Yb, Gd : {SrF}_{2}$ and Other ${Yb}^{3 +}$ -doping Crystals