HIGH PRECISION MID-IR SPECTROSCOPY OF $^{14}$N$_{2}$$^{16}$O NEAR 4.5 $\mu$m
Date
2011
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Publisher
Ohio State University
Abstract
The sub-Doppler saturation spectrum of the $^{14}$N$_{2}$$^{16}$O near 4.5 $\mu$m is studied using a mW-level DFG (Difference Frequency Generation) source. The DFG radiation is generated by a Ti:sapphire laser and a Nd:YAG laser amplified by a 10-W fiber amplifier in a 45-mm long PPLN (Periodically-Poled Lithium Niobate) crystal. The Nd:YAG laser is frequency-doubled and frequency stabilized on one $^{127}$I$_{2}$ hyperfine transition. The Ti:sapphire laser is locked onto the center of N$_{2}$O transition and its frequency is measured by an OFC (Optical Frequency Comb). In this talk, we will report our measurements of the fundamental band of N$_{2}$O near 4.5 $\mu$m. \\
Description
Author Institution: Department of Physics, National Tsing Hua University, Hsinchu, Taiwan 30013, R.O.C