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

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

doi:10.3788/COL202018.101401

Journals >Chinese Optics Letters >Volume 18 >Issue 10 >Page 101401 > Article

Chinese Optics Letters
Vol. 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

Author Affiliations

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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DOI: 10.3788/COL202018.101401 Cite this Article Set citation alerts

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 Copy Citation Text

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

Fig. 1. Absorption cross section and emission cross section of the

Yb, Gd : {SrF}_{2}

crystal.

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

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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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 1. Results of the Q-switched

Yb, Gd : {SrF}_{2}

Laser (

Absorbed Pump Power = 4.602 W

)

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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