Homodyne digital interferometry for a sensitive fiber frequency reference
Date
2014-07-28
Authors
Ngo, Silvie
McRae, Terry G.
Gray, Malcolm B.
Shaddock, Daniel A.
Journal Title
Journal ISSN
Volume Title
Publisher
Optical Society of America
Abstract
Digitally enhanced homodyne interferometry enables robust
interferometric sensitivity to be achieved in an optically simple configuration
by shifting optical complexity into the digital signal processing regime.
We use digitally enhanced homodyne interferometry in a simple, all-fiber
Michelson interferometer to achieve a frequency reference stability of better
than 20 Hz/
√
Hz from 10 mHz to 1 Hz, satisfying, for the first time in an
all fiber system, the stability requirements for the Gravity Recovery and
Climate Experiment Follow On mission. In addition, we have demonstrated
stability that satisfies the future mission objectives at frequencies down to
1 mHz. This frequency domain stability translates into a fractional Allan
deviation of 3.3×10−17 for an integration time of 55 seconds.
Description
Keywords
instrumentation, measurement, metrology, phase modulation, interferometry
Citation
Collections
Source
Optics Express
Type
Journal article
Book Title
Entity type
Access Statement
Open Access