TITLE

A continuous-wave optical parametric oscillator around 5-μm wavelength for high-resolution spectroscopy

AUTHOR(S)
Krieg, J.; Klemann, A.; Gottbehüt, I.; Thorwirth, S.; Giesen, T. F.; Schlemmer, S.
PUB. DATE
June 2011
SOURCE
Review of Scientific Instruments;Jun2011, Vol. 82 Issue 6, p063105
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present a continuous-wave optical parametric oscillator (OPO) capable of high resolution spectroscopy at wavelengths between 4.8 μm and 5.4 μm. It is based on periodically poled lithium niobate (PPLN) and is singly resonant for the signal radiation around 1.35 μm. Because of the strong absorption of PPLN at wavelengths longer than 4.5 μm, the OPO threshold rises to the scale of several watts, while it produces idler powers of more than 1 mW and offers continuous tuning over 15 GHz. A supersonic jet spectrometer is used in combination with the OPO to perform measurements of the transient linear molecule Si2C3 at 1968.2 cm-1. Fifty rovibrational transition frequencies of the ν3 antisymmetric stretching mode have been determined with an accuracy on the order of 10-4 cm-1, and molecular parameters for the ground and the v3 = 1 state have been determined most precisely.
ACCESSION #
62010855

 

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