Title :
Optical parametric generation covering the sodium D1, D2 lines from a 532-nm pumped periodically poled lithium niobate (PPLN) crystal with ionic-nonlinearity enhanced parametric gain
Author :
Huang, Yen-Chieh ; Chiang, An-Chung ; Lin, Yen-Yin ; Fang, Yen-Wen
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
12/1/2002 12:00:00 AM
Abstract :
We report optical parametric generation from a 532-nm-pumped periodically poled lithium niobate with a wavelength spectrum covering the sodium D1, D2 wavelengths 589.6 and 589.0 nm. Despite the 8 cm-1 attenuation at the 5.45 μm idler wavelength, the PPLN generates a 9 μJ/pulse energy near the 589-nm sodium wavelength when pumped by a 130 μJ/pulse frequency-doubled Nd:YAG Q-switched laser. The observed effective nonlinear coefficient is about 40% higher than its value at the visible and near infrared wavelengths. We believe that this is the first observation of ionic susceptibility enhanced parametric gain in the mid-infrared absorption region of lithium niobate.
Keywords :
dielectric polarisation; infrared spectra; lithium compounds; optical frequency conversion; optical materials; optical parametric devices; optical pumping; 5.45 micron; 532 nm; 589.0 nm; 589.6 nm; LiNbO3; YAG:Nd; YAl5O12:Nd; effective nonlinear coefficient; frequency-doubled Nd:YAG Q-switched laser; ionic susceptibility enhanced parametric gain; ionic-nonlinearity enhanced parametric gain; mid-infrared absorption region; near infrared wavelengths; optical parametric generation; periodically poled lithium niobate; pulse energy; sodium D1 line; sodium D2 line; sodium wavelength; visible wavelengths; wavelength spectrum; Adaptive optics; Electromagnetic wave absorption; Frequency conversion; Laser excitation; Lithium niobate; Nonlinear optics; Optical attenuators; Optical harmonic generation; Optical pumping; Pump lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2002.805113
