By Topic

Experimental demonstration of in-loop intracavity intensity-noise suppression

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
B. S. Sheard ; Dept. of Phys., Australian Nat. Univ., Canberra, ACT, Australia ; M. B. Gray ; B. J. J. Slagmolen ; J. H. Chow
more authors

Experimental results for intracavity-laser intensity-noise suppression, or "squashing," manifested as reduced fluctuations on the transmitted field photodetector voltage are presented. It is experimentally demonstrated that a rigid optical cavity within the feedback loop is compatible with squashing. The observed closed loop detector noise floor is approximately 16 nVrms/√Hz in the acoustic frequency range (∼100 Hz), well below the quantum limit due to shot noise of 148 nVrms/√Hz. This corresponds to 19 dB of observed noise suppression below the quantum limit and is consistent with the measured disturbance suppression function of the feedback loop. We also present measurements demonstrating the orthogonality of the squashing and frequency-locking control loops.

Published in:

IEEE Journal of Quantum Electronics  (Volume:41 ,  Issue: 3 )