OPTICAL FREQUENCY COMB SETUP AND USE OF AN EXTERNAL CAVITY FOR DISPERSION COMPENSATION AND FREQUENCY TUNING
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United States of America Patent
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Jan 7, 2021
app pub date -
Dec 5, 2018
filing date -
Dec 7, 2017
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Abstract
An optical frequency comb setup including a semiconductor cascade laser drivable by a laser driver, emitting a laser beam through an end facet of the semiconductor cascade laser with a frequency comb with at least two given individual emission frequencies, repetition frequency, carrier envelope offset frequency shows improved comb stability and/or comb formation and/or comb bandwidth. This is achieved by an external cavity added outside of the cavity of the semiconductor cascade laser, having a reflective element with a mirror surface reflecting the at least two individual emission frequencies being arranged in a relative distance to the end facet allowing to adapt repetition frequency and/or carrier envelope offset frequency and/or the dispersion seen by the light in the optical frequency comb setup.
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