Implementation and characterization of a thermal infrared laser heterodyne radiometer based on a wavelength modulated local oscillator laser Articles uri icon

publication date

  • May 2019

start page

  • 15575

end page

  • 15584

issue

  • 11

volume

  • 27

International Standard Serial Number (ISSN)

  • 1094-4087

abstract

  • This article presents the first implementation and the experimental characterization of a thermal infrared wavelength modulation laser heterodyne radiometer (WM-LHR) based on an external cavity quantum cascade laser. This novel WM-LHR system has demonstrated calibration-free operation, a superior signal to noise ratio and, more importantly, has opened the door for cost-efficient wide spectral range laser heterodyne radiometry in the near future.

keywords

  • infrared radiation; quantum cascade lasers; radiometers; signal to noise ratio; calibration free; cost-efficient; experimental characterization; external cavity; laser heterodyne; local oscillators; thermal infrared; wide spectral range; heterodyning