Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect Mirror
Due to their unique properties, vortex lasers have high application value in frontier fields such as optical micromanipulation, super-resolution imaging, quantum entanglement, and optical communication. In this study, we demonstrated a 946/1030 nm Laguerre-Gaussian (LG<sub>01</sub>) mode...
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MDPI AG
2023-05-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/5/554 |
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| author | Yashuai Yang Yongliang Li Xinyi Zhu Chi Wang Chao Yang |
| author_facet | Yashuai Yang Yongliang Li Xinyi Zhu Chi Wang Chao Yang |
| author_sort | Yashuai Yang |
| collection | DOAJ |
| description | Due to their unique properties, vortex lasers have high application value in frontier fields such as optical micromanipulation, super-resolution imaging, quantum entanglement, and optical communication. In this study, we demonstrated a 946/1030 nm Laguerre-Gaussian (LG<sub>01</sub>) mode dual-wavelength vortex laser by using an intracavity cascade pumped structure and a spot-defect output mirror. Using a coaxial linear cavity structure, the 808 nm laser diode (LD) was used to end-pump the Nd:YAG crystal to generate a 946 nm laser and then use it to directly pump the Yb:YAG crystal in the cavity to generate a 1030 nm laser, and finally a 946/1030 nm dual-wavelength laser came out. By making a spot defect in the center of the output mirror to suppress the oscillation of the fundamental Gaussian mode laser and carefully adjusting the position of the laser crystals, the LG<sub>01</sub> mode dual-wavelength vortex laser was output in single handedness. When the pump power was 40 W, the total output was 664 mW (356 and 308 mW at 946 and 1030 nm LG<sub>01</sub> mode vortex lasers), and the total optical-optical conversion efficiency was 1.7%; the output power fluctuations of 946 and 1030 nm LG<sub>01</sub> mode vortex lasers within 1 h were 3.43% and 3.13%, respectively; the beam quality factors M<sup>2</sup> of 946 and 1030 nm LG<sub>01</sub> mode vortex lasers were 2.35 and 2.40, respectively. It was proved that the generated dual-wavelength vortex laser had the wavefront phase <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>exp</mi><mfenced><mrow><mi mathvariant="normal">i</mi><mi mathvariant="sans-serif">ϕ</mi></mrow></mfenced></mrow></semantics></math></inline-formula> by the self-interference method. |
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| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-11T03:23:46Z |
| publishDate | 2023-05-01 |
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| series | Photonics |
| spelling | doaj.art-c59a38c85b8d418cabf88ba5d5e354bb2023-11-18T02:54:24ZengMDPI AGPhotonics2304-67322023-05-0110555410.3390/photonics10050554Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect MirrorYashuai Yang0Yongliang Li1Xinyi Zhu2Chi Wang3Chao Yang4School of Opto-Electronics Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Opto-Electronics Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Opto-Electronics Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Opto-Electronics Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Opto-Electronics Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaDue to their unique properties, vortex lasers have high application value in frontier fields such as optical micromanipulation, super-resolution imaging, quantum entanglement, and optical communication. In this study, we demonstrated a 946/1030 nm Laguerre-Gaussian (LG<sub>01</sub>) mode dual-wavelength vortex laser by using an intracavity cascade pumped structure and a spot-defect output mirror. Using a coaxial linear cavity structure, the 808 nm laser diode (LD) was used to end-pump the Nd:YAG crystal to generate a 946 nm laser and then use it to directly pump the Yb:YAG crystal in the cavity to generate a 1030 nm laser, and finally a 946/1030 nm dual-wavelength laser came out. By making a spot defect in the center of the output mirror to suppress the oscillation of the fundamental Gaussian mode laser and carefully adjusting the position of the laser crystals, the LG<sub>01</sub> mode dual-wavelength vortex laser was output in single handedness. When the pump power was 40 W, the total output was 664 mW (356 and 308 mW at 946 and 1030 nm LG<sub>01</sub> mode vortex lasers), and the total optical-optical conversion efficiency was 1.7%; the output power fluctuations of 946 and 1030 nm LG<sub>01</sub> mode vortex lasers within 1 h were 3.43% and 3.13%, respectively; the beam quality factors M<sup>2</sup> of 946 and 1030 nm LG<sub>01</sub> mode vortex lasers were 2.35 and 2.40, respectively. It was proved that the generated dual-wavelength vortex laser had the wavefront phase <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>exp</mi><mfenced><mrow><mi mathvariant="normal">i</mi><mi mathvariant="sans-serif">ϕ</mi></mrow></mfenced></mrow></semantics></math></inline-formula> by the self-interference method.https://www.mdpi.com/2304-6732/10/5/554dual-wavelengthLG<sub>01</sub> modespot-defect mirrorintra-cavity pumped |
| spellingShingle | Yashuai Yang Yongliang Li Xinyi Zhu Chi Wang Chao Yang Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect Mirror Photonics dual-wavelength LG<sub>01</sub> mode spot-defect mirror intra-cavity pumped |
| title | Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect Mirror |
| title_full | Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect Mirror |
| title_fullStr | Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect Mirror |
| title_full_unstemmed | Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect Mirror |
| title_short | Intra-Cavity Cascaded Pumped 946/1030 nm Dual-Wavelength Vortex Laser Using a Spot-Defect Mirror |
| title_sort | intra cavity cascaded pumped 946 1030 nm dual wavelength vortex laser using a spot defect mirror |
| topic | dual-wavelength LG<sub>01</sub> mode spot-defect mirror intra-cavity pumped |
| url | https://www.mdpi.com/2304-6732/10/5/554 |
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