Near-infrared Laser Spectorometer using AlGaAs／InGaAsP Diode Lasers and its Applications.

Abstract

  A high resolution laser spectrometer using AlGaAs and InGaAsP diode lasers has been developed. Wideband frequency tuning has been obtained by sweeping the operating temperature from 210K to 370K. The laser frequency is stabilized by suppressing fluctuations of the temperature and the injection current to 1mK and 2μA, respectively.

  We have applied the spectrometer to observe several overtone and combination bands of NH₃ and C₂H₂. The obtained results showed its good performance in high resolution spectroscopy of molecules. The obtained sensitivity is about 10^-9cm^-1.