Optical frequency comb construction and use of an external cavity for dispersion compensation and frequency adjustment

摘要

An optical frequency comb structure (1) is disclosed, comprising a semiconductor cascade laser (11) which can be operated by a laser driver (10) which emits a laser beam through an end facet (110) of the semiconductor cascade laser (11) with a frequency comb (12) with at least two given individual emission frequencies (f), a repetition frequency (f), a carrier-envelope curve offset frequency (f), which shows an improved comb stability and / or comb formation and / or comb bandwidth. This is achieved by an external cavity (5), which is added outside the cavity of the semiconductor cascade laser (11), comprising a reflective element (50) with a mirror surface (500) which reflects the given at least two individual emission frequencies (f) and which is spaced a relative distance (d) from the end facet (110), thereby enabling the repetition frequency (f) and / or the carrier-envelope offset frequency (f) and / or the dispersion to be adjusted as viewed from the light in the optical frequency comb structure (1).