Mr. Yudong Wang Profile

Yudong Wang

at Xi'an Univ of Technology

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Publications (2)

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Proceedings Article | 8 July 2022 Paper

Two-cavity dual-frequency Nd:YAG laser using Fabry-Perot etalon as single-longitudinal-mode selector

Fei Jiang, Mingxing Jiao, Yudong Wang, Junhong Xing, Yun Liu

Proceedings Volume 12280, 1228002 (2022) https://doi.org/10.1117/12.2616353

KEYWORDS: Fabry–Perot interferometers, Nd:YAG lasers, Reflectivity, Laser crystals, Laser applications, Laser resonators

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In order to obtain the dual-frequency laser output with tunable frequency-difference, a design scheme of dual-frequency Nd:YAG laser with two standing-wave cavities sharing the common gain medium has been proposed, which is based on the principle of longitudinal mode selection of the Fabry-Perot etalon. Both linear and right-angle cavities including a piece of Fabry-Perot etalon, the p- and s-polarized components of the 1064nm laser will be forced to oscillate simultaneously in single longitudinal mode in the linear and right-angle cavities, respectively. As a result the orthogonally and linearly polarized dual-frequency laser at 1064nm can be output; the frequency-difference can be tuned by adjusting the tilt angles of the intra-cavity Fabry-Perot etalons, the maximum frequency-difference is predicted theoretically to approach the oscillating bandwidth of the Nd:YAG laser. The principles of single longitudinal mode selection and frequency tuning of the Fabry-Perot etalon have been analyzed, and two fused quartz-made Fabry-Perot etalons have been designed and fabricated. An experimental system of diode-pumped two-cavity dual-frequency Nd:YAG laser at 1064nm has been established, the characteristics of single longitudinal mode oscillation and frequency tuning have been investigated experimentally. The orthogonally and linearly polarized dual-frequency laser output at 1064nm has been obtained, the frequency-difference of which being 21GHz and 76GHz, respectively. Such a two-cavity dual-frequency all-solid-state laser will be widely used in the synthetic-wave absolute-distance interferometry and other fields.

SPIE Journal Paper | 19 April 2022

Two-cavity dual-frequency Nd:YAG laser based on the principle of longitudinal mode selection by Fabry–Perot etalon

Fei Jiang, Mingxing Jiao, Yudong Wang, Junhong Xing, Yun Liu

OE, Vol. 61, Issue 04, 046110, (April 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.4.046110

KEYWORDS: Fabry–Perot interferometers, Nd:YAG lasers, Polarization, Crystals, Reflectivity, Ferroelectric materials, Optical engineering, Laser damage threshold, Tunable lasers, Prisms

Read Abstract +

To obtain the dual-frequency laser output with large and tunable frequency difference, a design scheme of dual-frequency Nd:YAG laser with two standing-wave cavities sharing the common gain medium has been proposed, which is based on the principles of polarization splitting and single longitudinal mode selection of intracavity Fabry–Perot etalon. With each of the cavities containing a piece of Fabry–Perot etalon, the p- and s-polarized components of the laser at 1064 nm will be forced to oscillate simultaneously in single longitudinal mode in the linear and right-angle cavities, respectively. As a result, the orthogonally and linearly polarized dual-frequency laser at 1064 nm can be obtained. The principle of single longitudinal mode selection by use of the Fabry–Perot etalon has been analyzed, and the Fabry–Perot etalons have been designed. An experimental system of the two-cavity dual-frequency Nd:YAG laser at 1064 nm has been established, and the characteristics of single longitudinal mode oscillation of the two cavities have been investigated experimentally. The orthogonally and linearly polarized dual-frequency laser output at 1064 nm has been obtained; the main characteristics of the oscillating threshold and output power, the polarization state as well as the laser beam quality have been tested experimentally. The frequency difference of the dual-frequency laser has been tuned in turn to 16, 24, 37, and 76 GHz, by slightly adjusting the tilt angles of the intracavity Fabry–Perot etalons. Such a two-cavity dual-frequency Nd:YAG laser will be widely used in the synthetic-wave absolute-distance interferometry and other fields.

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