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Pulsed terahertz frequency domain spectrometer with single mode-locked laser and dispersive phase modulator

  • US 20080179528A1
  • Filed: 04/26/2007
  • Published: 07/31/2008
  • Est. Priority Date: 01/31/2007
  • Status: Active Grant
First Claim
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1. An apparatus for analyzing, identifying or imaging a target, comprising:

  • a source of pulse signals in the range of frequencies from 100 GHz to over 2 THz including a first photoconductive switch activated by a pulsed optical beam from a laser resulting in a frequency spectrum f, 2f, 3f, . . . etc. where f is the order of 100 MHz;

    a radiator for causing said signals to be substantially simultaneously focused on or through said target; and

    a detector for acquiring spectral information reflected from said target and coupled to a second pulsed optical beam derived from said laser for generating an electrical signal representative of some characteristic of the target.

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