Frequency noise measurements using coherent self-heterodyne detection

Simon Thorndahl Thomsen*, Mónica Far Brusatori, Niklas Hedegaard Arent, Rakesh Ranjan Kumar, Nicolas Volet

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisLetterpeer review

Abstract

We demonstrate a refined way to extract the frequency noise (FN) spectrum of lasers by tailoring the delay in a conventional delayed self-heterodyne setup to sub-coherence lengths. The method achieves direct proportionality between electrical spectrum analyzer traces and the FN spectrum, which provide the intrinsic linewidth of the lasers. This proposed method is validated by comparing the FN spectrum with that obtained from a commercial frequency noise analyzer. The method provides a cost-effective alternative for FN measurements, which also requires minimal post-processing as compared to the state-of-the-art.

OriginalsprogEngelsk
TidsskriftOptics Letters
Vol/bind48
Nummer24
Sider (fra-til)6372-6375
Antal sider4
ISSN0146-9592
DOI
StatusUdgivet - dec. 2023

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