High-resolution pulsed dye laser calibration in the 500–350 nm region using iodine atlas reference lines

Abstract

Articles you may be interested inPolychromators in the ultraviolet/infrared (350-750 nm) spectral range for high-resolution, high sensitivity plasma spectroscopy (abstract) Rev. Sci.A simple, inexpensive method for precisely calibrating high-resolution, pulsed dye lasers in the 500-350 nm wavelength region has been devised. The residual portion of the laser beam exiting from an experiment is Raman shifted to longer wavelengths in a high-pressure hydrogen cell. The Stokes shifted output is used to excite laser induced fluorescence (LIF) signals in 12 vapor, which, in tum, are used to accurately calibrate the wavelength of the Raman shifted beam. The constant Raman shift, which can be precisely calculated, is then added to give the original laser wavelength. The method is readily adapted to computerized data acquisition and gives results of comparable accuracy to those of 12 LIF calibrations in the conventional 850-500 nrn region.

Spectroscopic characterization of the first singlet (Ã B11) excited state of Li167O7Li

“…The laser radiation, after being stimulated-Raman shifted 4155.225 cm Ϫ1 to the red in a high-pressure H 2 cell, 6 was calibrated ͑consistently and accurately͒ using either the optogalvanic effect for Ne transitions 7 ͑corrected to vacuum͒ in a low-pressure hollow-cathode lamp, 7 or fluorescence from I 2(g) transitions 8 in an evacuated cell filled with I 2(s) at room temperature. Fig.…”

Jet spectroscopy, structure, anomalous fluorescence, and molecular quantum beats of silylidene (H2C=Si), the simplest unsaturated silylene

“…The high-resolution spectra were calibrated to an accuracy of Ϯ0.005 cm Ϫ1 using the I 2 LIF-Raman shifting technique described elsewhere. 20 In all cases, the LIF spectra and the calibration signals were digitized and recorded simultaneously on a data acquisition system of our own design. 21 Fluorescence decay curves were measured under collision-free conditions with the excitation laser 38 mm downstream of the electric discharge flow channel.…”

Electric Field Induced Dissociation of Molecules in Rydberg-like Highly Vibrationally Excited Ion-Pair States

“…* '~bservation of laer induced fluorescence from 11 c m often pmvîde a suitable calibration for dye lasers. However, this is over a timited range of the spectnim [138], and the &ne density is so hi& that individual transitions are not casily rcsolvcd with pulsed dye h . Fluence directeci into larnp was x 10 pJ/pulse, focused from a collimated beam width of 1 mm using a 25 cm focal length lens.…”