Widely tunable 2 &#181;m optical vortex from a Tm:YAP laser

Jingjing Zhou; Changsheng Zheng; Bin Chen; Ning Zhang; Qinggang Gao; Hangqi Yuan; Daiwen Jia; Zhanxin Wang; Shande Liu; Yuping Zhang; Huiyun Zhang; Yongguang Zhao

doi:10.3788/COL202321.021405

Journals >Chinese Optics Letters >Volume 21 >Issue 2 >Page 021405 > Article

Chinese Optics Letters
Vol. 21, Issue 2, 021405 (2023)

Widely tunable 2 µm optical vortex from a Tm:YAP laser

Jingjing Zhou¹, Changsheng Zheng¹, Bin Chen^2、3, Ning Zhang^2、3, Qinggang Gao^2、3, Hangqi Yuan¹, Daiwen Jia¹, Zhanxin Wang^1、*, Shande Liu², Yuping Zhang², Huiyun Zhang², and Yongguang Zhao^1、3、**

Author Affiliations

¹Jiangsu Key Laboratory of Advanced Laser Materials and Devices, Jiangsu Normal University, Xuzhou 221116, China

²College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China

³Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging Industry, Jiangsu Normal University, Xuzhou 221116, China

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DOI: 10.3788/COL202321.021405 Cite this Article Set citation alerts

Jingjing Zhou, Changsheng Zheng, Bin Chen, Ning Zhang, Qinggang Gao, Hangqi Yuan, Daiwen Jia, Zhanxin Wang, Shande Liu, Yuping Zhang, Huiyun Zhang, Yongguang Zhao. Widely tunable 2 µm optical vortex from a Tm:YAP laser[J]. Chinese Optics Letters, 2023, 21(2): 021405 Copy Citation Text

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(a) Calculated effective pumping areas versus cavity length for different LG modes with an annular pump. (b) Schematic of the 2 µm wavelength-tunable Tm:YAP vortex laser. LD, laser diode; L, lens; IM, input mirror; BF, birefringent filter; OC, output coupler.

Fig. 1. (a) Calculated effective pumping areas versus cavity length for different LG modes with an annular pump. (b) Schematic of the 2 µm wavelength-tunable Tm:YAP vortex laser. LD, laser diode; L, lens; IM, input mirror; BF, birefringent filter; OC, output coupler.

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(a) Laser slope efficiency, (b) wavelength tuning performance, and (c) the polarization measurement of the annular light pumped Tm:YAP laser with E∥b and E∥c polarization. Inset in (a): beam pattern and the corresponding optical spectrum of the Tm:YAP laser without BF.

Fig. 2. (a) Laser slope efficiency, (b) wavelength tuning performance, and (c) the polarization measurement of the annular light pumped Tm:YAP laser with E∥b and E∥c polarization. Inset in (a): beam pattern and the corresponding optical spectrum of the Tm:YAP laser without BF.

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Fig. 3. Simulated beam radius of laser in the YAP crystal as a function of absorbed pump power by considering the thermal lens effect. Inset: beam profiles of the output laser at different pump powers.

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Fig. 4. (a) Laser output performance of the LG_0,+1 modes with and without the BF. (b) Beam profiles and the corresponding interference fringe patterns of LG_0,+1 and LG_0,-1 modes. Insets in (a): optical spectra and polarization measurement of LG_0,+1 and LG_0,-1 modes without the BF in the cavity.

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Fig. 5. (a) Measured tuning spectra for LG_0,+1 and LG_0,-1 modes at the fixed absorbed pump power of 4.27 W. (b) and (c) The measured spectral lines at several typical wavelengths for the LG_0,+1 and LG_0,-1 modes.

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