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

摘要：

　　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.

关键词： two-cavity dual-frequency Nd∶YAG laser Pound-Drever-Hall method Fabry-Perot cavity FPGA absolute-distance interferometry

作者: XING Junhong JIAO Mingxing ZHENG Yi ZHENG Lingling

作者单位: Department of Precision Instruments, School of Mechanical and Instrumental Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, People’s Republic of China

会议类型: 国际会议

会议名称: 2012第八届精密工程测量和仪器仪表国际研讨会(ISPEMI2012)

会议地点: 成都

会议语种:英文

页码: 1-7

在线出版日期: 2012-08-08（万方平台首次上网日期，不代表论文的发表时间）