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Updated: May 21, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Wide-bandwidth phase lock between a CW laser and a frequency comb based on a feed-forward configuration
1Dipartimento di Fisica—Politecnico di Milano, Polo di Lecco, Via Ghislanzoni 24, 23900 Lecco, Italy. d.gatti@polimi.it
Abstract:
Wide-bandwidth phase lock between the tooth of a frequency comb and a CW extended-cavity diode laser at 1.55 μm is achieved by the use of an acousto-optical frequency shifter in a feed-forward configuration. The coherence properties of the comb are efficiently transferred to the CW laser, whose linewidth is narrowed down to the ∼10 KHz comb level. A maximum control bandwidth of ∼0.6 MHz has been experimentally achieved, limited by the transit time of the acoustic wave inside the frequency shifter.
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