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5 December 2024 Injection-seeded H-β Fraunhofer line narrow-linewidth nanosecond pulsed optical parametric oscillator
Yue Song, Zhenzhen Yu, Shiguang Li, Mingjian Wang, Xiaopeng Zhu, Jiqiao Liu, Xia Hou, Weibiao Chen
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Proceedings Volume 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024); 134182Q (2024) https://doi.org/10.1117/12.3048578
Event: 15th International Conference on Information Optics and Photonics (CIOP2024), 2024, Xi’an, China
Abstract
Spaceborne lidar for ocean vertical profile detection requires a narrow linewidth pulsed laser source with a wavelength of 486.134 nm, which coincides with the H-β Fraunhofer absorption line. An injection-seeded optical parametric oscillator (OPO) is developed to meet this requirement. The 355 nm ultraviolet (UV) laser obtained from a 1064.4 nm Nd:YAG nonplanar ring oscillator (NPRO) after multi-stage cascade amplification and frequency tripling is used as the pump source for the OPO. The OPO is a single-resonant three-mirror ring cavity structure with a critical phase-matched β-barium borate (BBO) as the nonlinear crystal. A 486.134 nm continuous-wave (CW) single-frequency laser obtained by frequency doubling of a 972.268 nm laser diode (LD) with a linewidth of less than 100 kHz is injected into the OPO as a seed source. With an incident 355 nm pump energy of 58.4 mJ, a signal pulse energy of 23.8 mJ and pulse width of 5.05 ns is obtained, with the pump to signal conversion efficiency of 40.7%. The central wavelength of the signal pulse is 486.134 nm, and the corresponding spectral linewidth is 0.017 nm, with the measured wavelength stability over 30 minutes of less than 11 MHz.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Yue Song, Zhenzhen Yu, Shiguang Li, Mingjian Wang, Xiaopeng Zhu, Jiqiao Liu, Xia Hou, and Weibiao Chen "Injection-seeded H-β Fraunhofer line narrow-linewidth nanosecond pulsed optical parametric oscillator", Proc. SPIE 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024), 134182Q (5 December 2024); https://doi.org/10.1117/12.3048578
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KEYWORDS
Optical parametric oscillators
Crystals
Pulsed laser operation
Laser frequency
Laser crystals
Energy efficiency
Nd:YAG lasers
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