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Proceedings Paper

An all optical fiber frequency reference using digital interferometry
Author(s): Malcolm B. Gray; Terry G. McRae; Silvie Ngo; Daniel A. Shaddock; Magnus T. L. Hsu
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Paper Abstract

We use digitally enhanced heterodyne interferometry to measure the stability of optical fiber laser frequency references. Suppression of laser frequency noise by over four orders of magnitude is achieved using post processing time delay interferometry. This approach avoids dynamic range and bandwidth issues that can occur in feedback stabilization systems. Thus long fiber lengths may be used resulting in better frequency discrimination, a reduction in spatially uncorrelated noise sources and an increase in interferometer sensitivity. We achieve an optical stability of 30 Hz/√Hz for quasi-static frequencies as low as 20 mHz.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915726 (2 June 2014); doi: 10.1117/12.2059435
Show Author Affiliations
Malcolm B. Gray, National Measurement Institute of Australia (Australia)
Terry G. McRae, National Measurement Institute of Australia (Australia)
Silvie Ngo, The Australian National Univ. (Australia)
Daniel A. Shaddock, The Australian National Univ. (Australia)
Magnus T. L. Hsu, National Measurement Institute of Australia (Australia)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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