A new scheme for coherently connecting optical frequencies in a 3:1 ratio has been demonstrated. To phase lock a Nd:YAG laser at 1064 nm with a CO overtone laser at 3192 nm, we generated their difference frequency in RbTiOAsO4 (RTA) and beat it against the second harmonic of 3192 nm that was generated in AgGaSe2.
© 1996 Optical Society of America
Original Manuscript: March 7, 1996
Published: September 1, 1996
Olivier Pfister, Manfred Mürtz, Joseph S. Wells, James T. Murray, and Leo Hollberg, "Division by 3 of optical frequencies by use of difference-frequency generation in noncritically phase-matched RbTiOAsO4," Opt. Lett. 21, 1387-1389 (1996)