We report what is believed to be the first demonstration of an optical parametric oscillator directly pumped by the 1.55-μm output of an erbium-doped fiber laser. The oscillator, based on periodically poled lithium niobate, produced 8-μJ idler output near 3.8 μm at a 500-Hz repetition rate when it was pumped with 100-μJ 60-ns pulses at 1.55 μm . Temperature tuning of the 50-mm-long PPLN crystal gave signal and idler ranges of 2.55 to 2.7 μm and 3.65 to 3.96 μm , respectively, limited by mirror reflectivity. A signal-tuning range of 40 nm was observed for 13.5 nm of pump tuning with a fixed grating period and temperature. The optical parameter oscillator could be operated at low temperature with no sign of photorefractive damage.
© 1999 Optical Society of America
P. E. Britton, H. L. Offerhaus, D. J. Richardson, P. G. R. Smith, G. W. Ross, and D. C. Hanna, "Parametric oscillator directly pumped by a 1.55-μm erbium-fiber laser," Opt. Lett. 24, 975-977 (1999)