Lasers, Fiber Optics, and Communications

T-shaped cavity dual-frequency Nd:YAG laser with electro-optical modulation

[+] Author Affiliations
Junhong Xing, Mingxing Jiao, Yun Liu

Xi’an University of Technology, Department of Precision Instruments, 5 South Jinhua Road, Xi’an, Shaanxi 710048, China

Opt. Eng. 55(5), 056115 (May 27, 2016). doi:10.1117/1.OE.55.5.056115
History: Received December 21, 2015; Accepted May 3, 2016
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Abstract.  A T-shaped cavity dual-frequency Nd:YAG laser with electro-optical modulation is proposed, which consists of both p- and s-cavities sharing the same gain medium of Nd:YAG. Each cavity was not only able to select longitudinal mode but also tune frequency using an electro-optic birefringent filter polarization beam splitter + lithium niobate. The frequency difference of dual frequency was tuned through the whole gain bandwidth of Nd:YAG, which is far above the usually accepted free spectral range value in the case of a single-axis laser. As a result, the simultaneous operation of orthogonally and linearly polarized dual-frequency laser was obtained, which coincides with the theoretical analysis based on Jones matrices. The obtained frequency difference ranges from 0 to 132 GHz. This offers a simple and widely tunable source with potential for portable frequency reference applications in terahertz-wave generation and absolute-distance interferometry measurement areas.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Junhong Xing ; Mingxing Jiao and Yun Liu
"T-shaped cavity dual-frequency Nd:YAG laser with electro-optical modulation", Opt. Eng. 55(5), 056115 (May 27, 2016). ; http://dx.doi.org/10.1117/1.OE.55.5.056115


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