Sideband injection locking in microresonator frequency combs

Author:

Wildi Thibault1ORCID,Ulanov Alexander1ORCID,Englebert Nicolas2ORCID,Voumard Thibault1ORCID,Herr Tobias13ORCID

Affiliation:

1. Deutsches Elektronen-Synchrotron DESY 1 , Notkestr. 85, 22607 Hamburg, Germany

2. OPERA-Photonics, Université libre de Bruxelles (U.L.B.) 2 , 50 Avenue F. D. Roosevelt, CP 194/5, B-1050 Brussels, Belgium

3. Physics Department, Universität Hamburg UHH 3 , Luruper Chaussee 149, 22761 Hamburg, Germany

Abstract

Frequency combs from continuous-wave-driven Kerr-nonlinear microresonators have evolved into a key photonic technology with applications from optical communication to precision spectroscopy. Essential to many of these applications is the control of the comb’s defining parameters, i.e., carrier-envelope offset frequency and repetition rate. An elegant and all-optical approach to controlling both degrees of freedom is the suitable injection of a secondary continuous-wave laser into the resonator onto which one of the comb lines locks. Here, we experimentally study such sideband injection locking in microresonator soliton combs across a wide optical bandwidth and derive analytic scaling laws for the locking range and repetition rate control. As an application example, we demonstrate optical frequency division and repetition rate phase-noise reduction to three orders of magnitude below the noise of a free-running system. The presented results can guide the design of sideband injection-locked, parametrically generated frequency combs with opportunities for low-noise microwave generation, compact optical clocks with simplified locking schemes, and, more generally, all-optically stabilized frequency combs from Kerr-nonlinear resonators.

Funder

H2020 ERC

Helmholtz Young Investigators Group

Publisher

AIP Publishing

Subject

Computer Networks and Communications,Atomic and Molecular Physics, and Optics

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