Rapid-scanning computer-controlled tunable diode laser spectrometer
- 15 August 1980
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 19 (16) , 2762-2766
- https://doi.org/10.1364/ao.19.002762
Abstract
A novel method for scanning and acquiring data from a tunable diode laser spectrometer is described. The beam from the diode is chopped with a tuning fork chopper, and the laser current is advanced during each dark cycle using a digital-to-analog converter. Spectra measured in this fashion show at least an order of magnitude improvement in signal-to-noise ratio over spectra measured in the conventional fashion using a lock-in amplifier, and signal drift is reduced. These improvements allow accurate line profiles to be measured and subtle changes in the diode emission modes to be monitored.Keywords
This publication has 5 references indexed in Scilit:
- Second Derivative Tunable Diode Laser Spectrometry for Line Profile Determination. II. Experimental ResultsApplied Spectroscopy, 1980
- Noise Reduction in Tunable Diode Laser Spectrometry of Hot GasesApplied Spectroscopy, 1979
- Tunable diode laser spectroscopy in the infrared: some practical considerations of techniques and calibration with ν_2 lines of HCNApplied Optics, 1979
- Tunable diode laser spectroscopy of CO2 in the 10- to 15-μm spectral region—Lineshape and Q-branch head absorption profileJournal of Molecular Spectroscopy, 1979
- Digital modulator and synchronous demodulator system: an alternative to the analog phase detectorReview of Scientific Instruments, 1978