Optimum design and experimental study of tunable dual-frequency Nd:YAG laser with large frequency difference

Junhong Xing; MIngxing Jiao; Yun Liu; Lei Chen

doi:10.1117/12.885440

31 December 2010 Optimum design and experimental study of tunable dual-frequency Nd:YAG laser with large frequency difference

Junhong Xing, MIngxing Jiao, Yun Liu, Lei Chen

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Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 754450 (2010) https://doi.org/10.1117/12.885440
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

Abstract

In order to obtain the output of tunable dual-frequency laser with large frequency difference, a scheme has been designed for diode-pumped two-cavity dual-frequency Nd:YAG laser, which is based on the principle of laser longitudinal mode selection by use of intra-cavity birefringent filter. The feasibility of simultaneously oscillated dual-frequency Nd:YAG laser output has been experimentally verified when a novel birefringent filter consisting of a polarizing beam-splitter and a half wave-plate (i.e. PBS-λ/2) as a laser longitudinal mode selector. The advantages and disadvantages of the dual-frequency Nd:YAG laser have been analyzed and an optimum design scheme of dual-frequency Nd:YAG laser at 1064nm has been proposed and experimentally investigated. In the optimum scheme, both output couplers of the straight and right angle standing-wave cavities have been chosen to be made from calcite crystal plates, and such birefringent output couplers together with the intra-cavity common piece of PBS element constitute two independent birefringent filters acting as laser axial mode selectors. The p-and s-component of 1064nm laser light can therefore be forced to oscillate simultaneously in single longitudinal mode in the straight and right angle cavities, respectively, and the frequency difference of dual-frequency laser can be tuned by changing each cavity-length. The experimentally obtained results indicate that the tuning range of frequency difference of dual-frequency laser at 1064nm has been expanded from the previous range of 27~113.4GHz to the present range of 11.9~148.4GHz when an optimum scheme is used.

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Junhong Xing, MIngxing Jiao, Yun Liu, and Lei Chen "Optimum design and experimental study of tunable dual-frequency Nd:YAG laser with large frequency difference", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754450 (31 December 2010); https://doi.org/10.1117/12.885440

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KEYWORDS

Nd:YAG lasers

Optical filters

Crystals

Tunable lasers

Output couplers

Laser crystals

Semiconductor lasers

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