Author/Authors :
Crabtree، نويسنده , , Kyle N. and Hodges، نويسنده , , James N. and Siller، نويسنده , , Brian M. and Perry، نويسنده , , Adam J. and Kelly، نويسنده , , Joseph E. and Jenkins II، نويسنده , , Paul A. and McCall، نويسنده , , Benjamin J.، نويسنده ,
Abstract :
The technique of velocity modulation spectroscopy has recently been combined with cavity enhancement and frequency modulation methods into a technique called noise-immune cavity-enhanced optical heterodyne velocity modulation spectroscopy (NICE-OHVMS). We have implemented NICE-OHVMS with a cw-optical parametric oscillator (OPO) tunable from 3.2 to 3.9 μm, and used it to record spectra of the R(1,0) and R(1,1)u transitions of the ν 2 fundamental band of H 3 + . The high optical power and cavity enhancement enable saturation of rovibrational transitions, which allows for line center frequencies to be measured with a precision of 70 kHz.
