Design and research of LD pulse pumped Er3+/Yb3+：Lu2Si2O7 crystal 100 kHz laser

Jianing PENG; Xue HAN; Xiaolu NIE; Xiang GAO; Zhanda ZHU; Hong LEI; Qiang LI

doi:10.3788/IRLA20240168

Journals >Infrared and Laser Engineering >Volume 53 >Issue 8 >Page 20240168 > Article

Infrared and Laser Engineering
Vol. 53, Issue 8, 20240168 (2024)

Design and research of LD pulse pumped Er³⁺/Yb³⁺：Lu₂Si₂O₇crystal 100 kHz laser

Jianing PENG¹, Xue HAN¹, Xiaolu NIE¹, Xiang GAO¹..., Zhanda ZHU^1,2, Hong LEI^1,2 and Qiang LI^1,2|Show fewer author(s)

Author Affiliations

¹Institute of Laser Engineering, College of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, China

²Beijing Engineering Research Center of Laser Technology, Beijing 100124, China

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DOI: 10.3788/IRLA20240168 Cite this Article

Jianing PENG, Xue HAN, Xiaolu NIE, Xiang GAO, Zhanda ZHU, Hong LEI, Qiang LI. Design and research of LD pulse pumped Er³⁺/Yb³⁺：Lu₂Si₂O₇crystal 100 kHz laser[J]. Infrared and Laser Engineering, 2024, 53(8): 20240168 Copy Citation Text

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Fig. 1. The device diagram of passive Q-switched laser. (a) Collimating focusing lens combination; (b) Single focusing lens

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Fig. 2. Free oscillating output power at different transmittance of output mirrors

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Fig. 3. Free oscillating output power at different transmittance of output mirrors

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Fig. 4. 100 kHz output pulse waveform. (a) Duty cycle 30%; (b) Duty cycle 70%

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Fig. 5. Pulse performance for 100 kHz. (a) Pump waveform and output laser pulse train; (b) Pulse width figure; (c) Output laser spectra; (d) Far field facula and beam quality measurement diagram

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$ F\mathrm{_{focus}} $/mm	$ {\omega }_{p} $/μm	$ {f}_{p} $/kHz	$ {T}_{Q} $	$ {T}_{OC} $	$ {\tau }_{P} $/μs	$ {E}_{p} $/μJ	$ f_0 $/kHz	$ E_0 $/μJ
40	130	100	99%	10%	3	27	100	0.7
3	240							0.5
4	300							0.6
5	350						＜100

Table 1. Optimization of pump beam diameter for 100 kHz

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Power/W	Duty cycle	Repeated frequency instability	Energy instability
9	30%	0.0345	0.1551
7.72	35%	0.0372	0.1926
6.75	40%	0.0391	0.2261
6	45%	0.0431	0.2746
5.4	50%	0.0446	0.3172
4.9	55%	0.0461	0.3631
4.5	60%	0.0513	0.3978
4.15	65%	0.0520	0.4339
3.85	70%	0.0566	0.4842

Table 2. Repeated frequency and energy instability measured under different duty cycles

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$ {f}_{p} $/kHz	$ {T}_{Q} $	$ {\omega }_{p} $/μm	$ {T}_{OC} $	$ {\tau }_{P} $/μs	$ {E}_{p} $/μJ	$ f_0 $/kHz	$ E_0 $/μJ	$ \tau_0 $/ns
100	95.8%	130	10%	3	27	＜100
	99%					100	0.7	240
	99.7%					100	0.5	270

Table 3. Optimization of initial transmittance of Co²⁺：MgAl₂O₄ for 100 kHz

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