We demonstrate a simple and robust technique for removal of the carrier wave from a phase-modulated laser beam, using a noninterferometric method that is insensitive to the modulation frequency and instead exploits the polarization dependence of electro-optic modulation. An actively stabilized system using feedback via a liquid crystal cell yields long-term carrier suppression in excess of 28 dB at the expense of a 6.5 dB reduction in sideband power.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: August 26, 2011
Revised Manuscript: December 16, 2011
Manuscript Accepted: December 16, 2011
Published: March 16, 2012
Nathan Cooper, James Bateman, Alexander Dunning, and Tim Freegarde, "Actively stabilized wavelength-insensitive carrier elimination from an electro-optically modulated laser beam," J. Opt. Soc. Am. B 29, 646-649 (2012)