Specifications

Source title: Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title: Proc SPIE Int Soc Opt Eng
Volume: 8759
Monograph title: Eighth International Symposium on Precision Engineering Measurements and
Instrumentation
Issue date: 2013
Publication year: 2013
Article number: 875941
Language: English
ISSN: 0277786X
CODEN: PSISDG
ISBN-13: 9780819495501
Document type: Conference article (CA)
Conference name: 8th International Symposium on Precision Engineering Measurements and
Instrumentation
Conference date: August 8, 2012 - August 11, 2012
Conference location: Chengdu, China
Conference code: 96463
Sponsor: International Committee on Measurements and Instrumentation; National Natural
Science Foundation of China; Chinese Society for Measurement; China Instrument and Control
Society
Publisher: SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States
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. © 2013 SPIE.
Number of references: 10
Main heading: Neodymium lasers
Controlled terms: Cavity resonators - Fabry-Perot interferometers - Interferometry -
Light sources - Natural frequencies - Precision engineering
Uncontrolled terms: Fabry-Perot cavity - Frequency differences - Frequency stabilizing
- Heterodyne interference - Interferometric system - ND : YAG lasers - Operating
frequency - Pound-Drever-Hall
Classification code: 941.4 Optical Variables Measurements - 941.3 Optical Instruments -