The signal-to-noise ratio for heterodyne laser radar with a coherent target-return beam and a squeezed local-oscillator beam is lower than that obtained using a coherent local oscillator, regardless of the method employed to combine the beams at the detector.
© 2007 Optical Society of America
Original Manuscript: December 1, 2006
Revised Manuscript: February 27, 2007
Manuscript Accepted: March 12, 2007
Published: April 24, 2007
Mark A. Rubin and Sumanth Kaushik, "Squeezing the local oscillator does not improve signal-to-noise ratio in heterodyne laser radar," Opt. Lett. 32, 1369-1371 (2007)