Design of digital Pound-Drever-Hall frequency stabilizing system for two-cavity dual-frequency Nd:YAG laser

Junhong Xing; Mingxing Jiao; Yi Zheng; Lingling Zheng

doi:10.1117/12.2015216

31 January 2013 Design of digital Pound-Drever-Hall frequency stabilizing system for two-cavity dual-frequency Nd:YAG laser

Junhong Xing, Mingxing Jiao, Yi Zheng, Lingling Zheng

Author Affiliations +

Proceedings Volume 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation; 875941 (2013) https://doi.org/10.1117/12.2015216
Event: International Symposium on Precision Engineering Measurement and Instrumentation 2012, 2012, Chengdu, China

Abstract

Two-cavity dual-frequency Nd:YAG laser with large frequency difference can be used as an ideal light source for synthetic-wave absolute-distance interferometric system. The operation principle of the two-cavity dual-frequency Nd:YAG laser with large frequency difference has been introduced, and the frequency locking principle of the Pound-Drever-Hall (PDH) method has been analyzed. A FPGA-based digital PDH frequency stabilizing system for the two-cavity dual-frequency Nd:YAG laser has been designed, in which the same frequency reference of a high finesse Fabry-Perot cavity is used and two separate heterodyne interference sub-systems are employed so that two electrical error signals can be obtained. Having been processed through FPGA, the output signals are applied to drive the PZT frequency actuators attached on the two-cavity dual-frequency Nd:YAG laser, as a result both operating frequencies of the two-cavity dual-frequency Nd:YAG laser can be simultaneously frequency-locked to two resonant frequencies of the Fabry-Perot cavity. A frequency stability of better than 10^-10 will be obtained by use of the digital PDH frequency locking system, which can meet the needs of synthetic-wave absolute-distance interferometry.

Citation Download Citation

Junhong Xing, Mingxing Jiao, Yi Zheng, and Lingling Zheng "Design of digital Pound-Drever-Hall frequency stabilizing system for two-cavity dual-frequency Nd:YAG laser", Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 875941 (31 January 2013); https://doi.org/10.1117/12.2015216

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