Digitally enhanced optical fiber frequency reference
Date
2014-04-01
Authors
McRae, Terry G
Ngo, Silvie
Shaddock, Daniel A
Hsu, Magnus T L
Gray, Malcolm B
Journal Title
Journal ISSN
Volume Title
Publisher
Optical Society of America
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, allowing us to measure the mechanical stability for frequencies as low as 100 μHz. The performance of the digitally enhanced heterodyne interferometer platform used here is not practically limited by the dynamic range or bandwidth issues that can occur in feedback stabilization systems. This allows longer measurement times, better frequency discrimination, a reduction in spatially uncorrelated noise sources and an increase in interferometer sensitivity. An optical fiber frequency reference with the stability reported here, over a signal band of 20 mHz-1 Hz, has potential for use in demanding environments, such as space-based interferometry missions and optical flywheel applications.
Description
Keywords
Laser stabilization, Metrology, Interferometry, Space instrumentation
Citation
Collections
Source
Optics letters
Type
Journal article
Book Title
Entity type
Access Statement
Open Access