Asynchronous Upconversion Sampling of Frequency Modulated Combs

Abstract: In recent years, optical frequency combs with a frequency modulated output have attracted considerable attention. While first observed decades ago in externally modulated lasers, a whole class of semiconductor lasers has since been identified to spontaneously enter such a regime of self frequency modulation. The temporal properties of these sources are commonly measured indirectly via phase‐resolved frequency domain measurements. In this work, they demonstrate an asynchronous optical sampling technique which operates directly in time domain.. On the basis of a mid‐infrared quantum cascade laser frequency comb, both its instantaneous intensity and optical frequency are measured. The results confirm a quasi‐constant intensity output alongside a close to linear frequency chirp, in accordance with phase‐resolved spectral measurements. Contrary to previous works, stable phase‐locking is achieved in a regime of positive intracavity dispersion resulting in an inversion of the observed frequency modulation.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Asynchronous Upconversion Sampling of Frequency Modulated Combs ; day:12 ; month:02 ; year:2023 ; extent:5 ; Laser & photonics reviews ; (12.02.2023) (gesamt 5)

Contributors, Places and Time

• Creator: Täschler, Philipp ; Forrer, Andres ; Bertrand, Mathieu ; Kapsalidis, Filippos ; Beck, Mattias ; Faist, Jérôme

Further information

• DOI: 10.1002/lpor.202200590
• URN: urn:nbn:de:101:1-2023021314151881243897
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:56 AM CEST