Barr, B.W. , Huttner, S.H., Taylor, J.R., Sorazu, B., Plissi, M.V. and Strain, K. (2007) Optical modulation techniques for length sensing and control of optical cavities. Applied Optics, 46(31), pp. 7739-7745. (doi: 10.1364/AO.46.007739) (PMID:17973018)
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Abstract
We present a discussion of the use of amplitude modulation techniques with regard to the length sensing and control of optical cavities for laser interferometric gravitational-wave detectors. Traditional radio-frequency amplitude modulation techniques automatically include phase modulation as a product of the modulation process, which can contaminate the signal after demodulation. In particular, with many length-sensing and control schemes the detected signals are demodulated in quadrature, which, in the case of a traditional amplitude modulation scheme, will result in offsets due to the additional phase modulation. We demonstrate this effect using a simple optical cavity configuration and show that minor adjustments to the modulator system can be used to compensate for the extra modulation components and provide additional flexibility.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Barr, Dr Bryan and Sorazu Lucio, Dr Borja and Plissi, Dr Michael and Huttner, Dr Sabina and Strain, Professor Kenneth |
| Authors: | Barr, B.W., Huttner, S.H., Taylor, J.R., Sorazu, B., Plissi, M.V., and Strain, K. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
| Journal Name: | Applied Optics |
| Publisher: | Optical Society of America |
| ISSN: | 0003-6935 |
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