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US 9,391,420 B2Granted
Monolithically integrated absolute frequency comb laser system
AssigneeSandia Corporation
InventorMichael C. Wanke
Life of this patent
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Abstract
Rather than down-convert optical frequencies, a QCL laser system directly generates a THz frequency comb in a compact monolithically integrated chip that can be locked to an absolute frequency without the need of a frequency-comb synthesizer. The monolithic, absolute frequency comb can provide a THz frequency reference and tool for high-resolution broad band spectroscopy.
Claims6
A monolithically integrated absolute frequency comb source, comprising:
- a Fabry-Perot laser emitting light at many equally spaced modes;
- an integrated mixing element that generates sum, difference, and harmonic frequencies of the laser modes;
- and
- a microwave frequency counter that uses the signals generated by the mixer to lock the absolute frequency of the comb of laser lines.
1 more element
Dependencies are inferred from the claim text.