Er3+/Yb3+: Lu2Si2O7 crystal microchip laser pumped by LD at kHz

Xue Han; You Lv; Jianing Peng; Jiaxiang Guo; Yongling Hui; Zhanda Zhu; Hong Lei; Qiang Li

doi:10.3788/IRLA20220811

Journals >Infrared and Laser Engineering >Volume 52 >Issue 7 >Page 20220811 > Article

Infrared and Laser Engineering
Vol. 52, Issue 7, 20220811 (2023)

Er³⁺/Yb³⁺: Lu₂Si₂O₇ crystal microchip laser pumped by LD at kHz

Xue Han¹, You Lv¹, Jianing Peng¹, Jiaxiang Guo¹, Yongling Hui^{1、2、3、4}, Zhanda Zhu^{1、2、3、4}, Hong Lei^{1、2、3、4}, and Qiang Li^{1、2、3、4、*}

Author Affiliations

¹Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China

²Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Beijing 100124, China

³Beijing Engineering Research Center of Laser Technology, Beijing 100124, China

⁴Beijing Higher Institution Engineering Research Center of Advanced Laser Manufacturing, Beijing 100124, China

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DOI: 10.3788/IRLA20220811 Cite this Article

Xue Han, You Lv, Jianing Peng, Jiaxiang Guo, Yongling Hui, Zhanda Zhu, Hong Lei, Qiang Li. Er³⁺/Yb³⁺: Lu₂Si₂O₇ crystal microchip laser pumped by LD at kHz[J]. Infrared and Laser Engineering, 2023, 52(7): 20220811 Copy Citation Text

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Fig. 1. Experimental device

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Free oscillation optimization results.（a） Free oscillating output power at different transmittance of output mirrors; （b） Comparison of output power under different pump spots; （c） Output power at different transmittance of output mirrors; （d） Fitting plot of slope efficiency

Fig. 2. Free oscillation optimization results.（a） Free oscillating output power at different transmittance of output mirrors; （b） Comparison of output power under different pump spots; （c） Output power at different transmittance of output mirrors; （d） Fitting plot of slope efficiency

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Fig. 3. Output laser spectra

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Fig. 4. Pulse performance for 1 kHz. （a） Pulse width figure; （b） Pump waveform and output laser pulse train;（c） Output laser pulse train; （d） Far field facula and beam quality measurement diagram

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Fig. 5. Pulse performance for 10 kHz. （a） Pulse width figure; （b） Pump waveform and output laser pulse train; （c） Output laser pulse train; （d） Far field facula and beam quality measurement diagram

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F_focus/ mm	ω_p/ μm	f_p/ kHz	T_Q	T_OC	τ_p/ μs	E_p/ mJ	f_o/ kHz	E_o/ μJ
3	240	1	95.8%	15%	700	3.5	1	20
4	300							24
5	350							20

Table 1. Optimization of pump beam diameter for 1 kHz

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f_p/kHz	T_Q	ω_p/μm	T_OC	τ_p/μs	E_p/mJ	f_o/kHz	E_o/μJ
1	94.5%	300	15%	700	3.5	1	27
1	95.8%	300	15%	700	3.5	1	24

Table 2. Optimization of initial transmittance of Co²⁺:MgAl₂O₄ for 1 kHz

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f_p/kHz	T_OC	T_Q	ω_p/μm	τ_p/μs	E_p/mJ	E_o/μJ	τ_o/ns
1	15%	94.5%	300	700	3.5	27	7.8
	20%					35	7
	30%					30	7.3

Table 3. Optimization of transmittance of output coupling mirror for 1 kHz

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F_focus/ mm	ω_p/ μm	f_p/ kHz	T_Q	T_OC	τ_p/ μs	E_p/ mJ	f_o/ kHz	E_o/ μJ
3	240	10	98.6%	15%	70	0.35	10	7
4	300						10	5
5	350						<10	-

Table 4. Optimization of pump beam diameter for 10 kHz

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f_p/kHz	T_Q	ω_p/μm	T_OC	τ_p/μs	E_p/mJ	f_o/kHz	E_o/μJ
10	98.6%	240	15%	70	0.35	10	7
10	99%	240	15%	70	0.35	>10	-

Table 5. Optimization of initial transmittance of Co²⁺:MgAl₂O₄ for 10 kHz

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f_p/kHz	T_OC	T_Q	ω_p/μm	τ_p/μs	E_p/mJ	E_o/μJ	τ_o/ns
10	8%		240	70	0.35	8	10
	10%	98.6%				10	10
	15%					7	12

Table 6. Optimization of transmittance of output coupling mirror for 10 kHz

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