OPTICAL FREQUENCY-DIVISION BY 3 OF 532 NM IN PERIODICALLY POLED LITHIUM-NIOBATE WITH A DOUBLE GRATING

Optical frequency division by 3 of 532 nm is demonstrated by back-to-b ack difference-frequency generation in a periodically poled lithium ni obate crystal with a double grating. The first grating generates 1596- nm light from 532- and 798-nm inputs, and the second grating mixes the 798-nm input and the 1596-nm output from the first grating to produce a second 1596-nm output. The beat signal between the two 1596-nm outp uts is detected and frequency stabilized to yield the 3:1 frequency ra tio. (C) 1998 Optical Society of America.