Dr. Snelling et al., NOISE IN SINGLE-SHOT BROAD-BAND COHERENT ANTI-STOKES-RAMAN SPECTROSCOPY THAT EMPLOYS A MODELESS DYE-LASER, Applied optics, 33(36), 1994, pp. 8295-8301
The noise in single-shot coherent anti-Stokes Raman (CARS) spectroscop
y that employs a broadband modeless dye laser (MDL) is examined and th
e results are compared with those of a conventional dye laser. The noi
se of the dye-laser, the nonresonant CARS, and the resonant N-2 CARS s
ignals are determined. The use of a MDL is shown to result in substant
ially reduced CARS noise when the CARS signal is generated with a sing
le-mode pump laser, but only a marginal reduction of noise is observed
with a multimode pump source The noise measurements are compared with
theoretical predictions that are based on models that assume modes of
random amplitudes and phases in the multimode laser sources. The comb
ination of a MDL and a single-mode pump laser is shown to increase the
precision of single-shot N-2 CARS temperature measurements.