Monolithically Integrated Absolute Frequency Comb Laser System

摘要

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.

主权项

1. 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.