Rakhmanov, M. and Evans, M. and Yamamoto, H. (1999) An optical vernier technique for in situ measurement of the length of long Fabry-Pérot cavities. Measurement Science and Technology, 10 (3). pp. 190-194. ISSN 0957-0233 http://resolver.caltech.edu/CaltechAUTHORS:RAKRAKmst99
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Abstract
We propose a method for in situ measurement of the length of kilometre-sized Fabry-Pérot cavities in laser gravitational wave detectors. The method is based on the vernier, which occurs naturally when the laser beam incident on the cavity has a sideband. By changing the length of the cavity over several wavelengths we obtain a set of carrier resonances alternating with sideband resonances. From the measurement of the separation between the carrier and a sideband resonance we determine the length of the cavity. We apply the technique to the measurement of the length of a Fabry-Pérot cavity in the Caltech 40m interferometer and discuss the accuracy of the technique.
| Item Type: | Article |
|---|---|
| Additional Information: | Copyright © Institute of Physics and IOP Publishing Limited 1999. Received 19 May 1998, in final form 12 November 1998, accepted for publication 2 December 1998. Print publication: Issue 3 (March 1999). We are very grateful to G Hu for setting up the data acquisition for the experiment. We also thank S Whitcomb, A Lazzarini, J Camp and A Arodzero for discussions and their comments on the paper. This work is supported by the National Science Foundation of the USA under cooperative agreement PHY-9210038. |
| Subject Keywords: | length measurement, vernier, Fabry-Pérot cavity, cavity length, Pound-Drever signal, LIGO |
| Record Number: | CaltechAUTHORS:RAKmst99 |
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:RAKRAKmst99 |
| Alternative URL: | http://dx.doi.org/10.1088/0957-0233/10/3/013 |
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 10202 |
| Collection: | CaltechAUTHORS |
| Deposited By: | Archive Administrator |
| Deposited On: | 16 Apr 2008 |
| Last Modified: | 26 Dec 2012 09:57 |
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