Cooper Nathan, Woods Jonathan, Bateman James, Dunning Alexander, Freegarde Tim
School of Physics and Astronomy, University of Southampton, Highfield, Southampton, UK.
Appl Opt. 2013 Aug 10;52(23):5713-7. doi: 10.1364/AO.52.005713.
We have demonstrated stabilization of a fiber-optic Mach-Zehnder interferometer, with a centimeter-scale path difference, to the transmission minimum for the carrier wave of a frequency-modulated laser beam. A time-averaged extinction of 32 dB, limited by the bandwidth of the feedback, was maintained over several hours. The interferometer was used to remove the carrier wave from a 780 nm laser beam that had been phase modulated at 2.7 GHz.
