Study on dual-frequency difference tuning characteristics of microchip cavity with two transverse mode output

GUI Kun; ZHANG Zilong; ZHAO Changming; ZHANG Haiyang; TIAN Shun

doi:10.7510/jgjs.issn.1001-3806.2020.01.004

LASER TECHNOLOGY > 2020 > 44(1): 20-25. > DOI: 10.7510/jgjs.issn.1001-3806.2020.01.004

GUI Kun, ZHANG Zilong, ZHAO Changming, ZHANG Haiyang, TIAN Shun. Study on dual-frequency difference tuning characteristics of microchip cavity with two transverse mode output[J]. LASER TECHNOLOGY, 2020, 44(1): 20-25. DOI: 10.7510/jgjs.issn.1001-3806.2020.01.004

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Study on dual-frequency difference tuning characteristics of microchip cavity with two transverse mode output

School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China

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Received Date: April 18, 2019
Revised Date: May 23, 2019
Published Date: January 24, 2020

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Abstract

Abstract

Two perpendicularly polarized transverse mode modes can be generated by a bipolarized laser resonator, namely fundamental transverse mode (TEM₀₀) and vortex beam with orbital angular momentum (LG₀₁). There is frequency difference in optical frequency. In order to study frequency difference tuning characteristics of two transverse modes, tuning technique combining temperature and voltage was adopted. Continuous tuning of beat signal in different frequency ranges was realized. The relationship between frequency difference of two modes vs. temperature and voltage was analyzed theoretically. Experiments showed that frequency difference can be tuned in wide range. Tuning accuracy of frequency difference was measured and analyzed. The results show that, there is good linear relationship between frequency difference vs. temperature and voltage. The tuning slopes of temperature and voltage are 3.14GHz/K and 1.76MHz/V, respectively. This study can better analyze the phenomenon of vortex beam generated directly by dual polarization resonator. It has application value in the fields of laser communication and lidar detection.
- lasers,
- solid microchip laser,
- dual-frequency laser,
- tunable frequency difference,
- vortex beam generated directly

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