We report what is to our knowledge the first observation of quasi-phase-matched parametric fluorescence in the 1.2–2.3-μm region, at ambient temperature, in lithium tantalate waveguides, using a pump wavelength between 805 and 845 nm. The signal fluorescent power depends strongly on the proton concentration in the waveguide, and signals of up to 7 pW have been observed for guided pump powers of 70 mW, which is 1 order of magnitude lower than the efficiency measured with lithium niobate guides.
© 1995 Optical Society of America
Original Manuscript: April 17, 1995
Published: July 1, 1995
P. Baldi, D. Delacourt, M. Papuchon, S. Nouh, K. El Hadi, M. de Micheli, and D. B. Ostrowsky, "Quasi-phase-matched parametric fluorescence in room-temperature lithium tantalate waveguides," Opt. Lett. 20, 1471-1473 (1995)