Terahertz modulation spectrometer

Details Terahertz modulation spectrometer Terahertz modulation spectrometer

2007-08-21

2007-08-21

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By light interference

Spectroscopy

C356S484000

Reexamination Certificate

active

10764036

ABSTRACT:
A method and apparatus for detecting spectral properties of a sample are disclosed. Electromagnetic radiation in the Terahertz range emitted from a first laser source is modulated and combined with electromagnetic radiation emitted from a second laser source. The frequency spectrum of the combined signal comprises sidebands which can be tuned to resonate with the frequency spectrum of the sample. Tuning of the sidebands is obtained by tuning the first laser source, the second laser source, or the modulation frequency.

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Ali, M.E., et al., “Optical Mixing with Difference Frequencies to 552 GHz in Ultrafast High Electron Mobility Transistors,”IEEE Photonics Technology Letters, vol. 12, No. 7, Jul. 2000, pp. 879-881.

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