کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1540570 | 996663 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Widely phase-matched tunable difference-frequency generation in periodically poled LiNbO3 crystal Widely phase-matched tunable difference-frequency generation in periodically poled LiNbO3 crystal](/preview/png/1540570.png)
We report on the development of a laser source in the mid-infrared spectral region based on difference-frequency generation (DFG) in a periodically poled LiNbO3 (PPLN) crystal. Continuously tunable coherent radiation from 2.75 to 4.78 μm was produced by optical parametric interaction between a diode-pumped monolithic continuous-wave (CW) Nd:YAG laser operating at 1.064 μm and a CW Ti:Sapphire laser tunable from 767 to 871 nm. Temperature-dependent quasi-phase-matched DFG wavelength acceptance bandwidth was studied and characterized. An empiric formula is given to estimate the phase-matched wavelength acceptance bandwidth as a function of the crystal temperature at Λ = 22.5 μm. A large frequency scan of 128 cm−1 (about 78 cm−1 above 1 μW) near 4.2 μm was achieved. The whole absorption spectrum of the P and R branches of the ν3 band of atmospheric carbon dioxide has been recorded with a single phase-matched frequency scan.
Journal: Optics Communications - Volume 281, Issue 6, 15 March 2008, Pages 1686–1692