Stabilized fiber-optic Mach-Zehnder interferometer for carrier-frequency rejection
arXiv:1309.2880 · doi:10.1364/AO.52.005713
Abstract
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.
\c{opyright} 2013 Optical Society of America. 5 pages, 5 figures