15 February 2018 Carrier-envelope offset frequency stabilization of an ultrafast semiconductor laser
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We present the self-referenced stabilization of the carrier-envelope offset (CEO) frequency of a semiconductor disk laser. The laser is a SESAM-modelocked VECSEL emitting at a wavelength of 1034 nm with a repetition frequency of 1.8 GHz. The 270-fs pulses are amplified to 3 W and compressed to 120 fs for the generation of a coherent octavespanning supercontinuum spectrum. A quasi-common-path f-to-2f interferometer enables the detection of the CEO beat with a signal-to-noise ratio of ~30 dB sufficient for its frequency stabilization. The CEO frequency is phase-locked to an external reference with a feedback signal applied to the pump current.
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Nayara Jornod, Kutan Gürel, Valentin J. Wittwer, Pierre Brochard, Sargis Hakobyan, Stéphane Schilt, Dominik Waldburger, Ursula Keller, Thomas Südmeyer, "Carrier-envelope offset frequency stabilization of an ultrafast semiconductor laser", Proc. SPIE 10515, Vertical External Cavity Surface Emitting Lasers (VECSELs) VIII, 105150K (15 February 2018); doi: 10.1117/12.2288974; https://doi.org/10.1117/12.2288974

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