Residual phase noise suppression for Pound-Drever-Hall cavity stabilization with an electro-optic modulator

Author
Abstract
We propose a simple method to suppress residual frequency/phase noise in PoundDrever-Hall (PDH) cavity stabilization setups. This method makes use of the electro-optic modulator that is commonly used in PDH setups, and hence, only requires the addition of a simple electronic feedback circuit. Here, we apply this method to stabilize a commercially available continuous wave (cw) laser to a high-finesse cavity, and we demonstrate additional phase noise suppression of ~30 dB and more from DC to 100 kHz, compared to the use of a fast-piezo actuator alone. This method can be applied to almost all PDH systems to achieve feedback bandwidths in the multi-MHz range. Furthermore, this method does not require additional actuators, such as acousto-optic modulators, and it does not introduce parasitic amplitude modulation to the first order. The limitations and drawbacks of this approach are also discussed.
Year of Publication
2018
Journal
OSA Continuum
Volume
1
Number of Pages
116-123
Date Published
2018-09
URL
https://www.osapublishing.org/DirectPDFAccess/2038A4BA-B56B-08A1-36F38AE0D83617E7_398177/osac-1-1-116.pdf?da=1\&id=398177\&seq=0\&mobile=no
DOI
10.1364/OSAC.1.000116
JILA PI
Journal Article