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Terahertz frequency domain spectrometer with discrete coarse and fine tuning

  • US 8,829,440 B2
  • Filed: 03/14/2013
  • Issued: 09/09/2014
  • Est. Priority Date: 05/19/2008
  • Status: Active Grant
First Claim
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1. A method for spectroscopy comprising:

  • sweeping a CW radiative beam over at least one frequency band in a range of frequencies greater than 100 GHz;

    receiving the CW radiative beam with a frequency control element and finely adjusting the frequency of the CW radiative beam using the frequency control element in frequency increments less than 100 MHz for generating electrical signals representative of some characteristic of a target in the at least one frequency band;

    directing the finely adjusted radiative beam to a target; and

    acquiring spectral information from the target.

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