High-coherence mid-infrared frequency comb | Zendy

Iacopo Galli | Zendy; Francesco Cappelli | Zendy; P. Cancio | Zendy; G. Giusfredi | Zendy; D. Mazzotti | Zendy; Saverio Bartalini | Zendy; Paolo De Natale | Zendy

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High-coherence mid-infrared frequency comb

Author(s) -

Iacopo Galli,

Francesco Cappelli,

P. Cancio,

G. Giusfredi,

D. Mazzotti,

Saverio Bartalini,

Paolo De Natale

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.028877

Subject(s) - laser linewidth , frequency comb , optics , comb generator , coherence (philosophical gambling strategy) , materials science , laser , sapphire , infrared , spectral density , optoelectronics , physics , telecommunications , computer science , quantum mechanics

We report on the generation of a frequency comb around 4330 nm with an unprecedented coherence of the single teeth. Generating the comb within a Ti:sapphire laser cavity by a difference-frequency process and using a phase-lock scheme based on direct digital synthesis, we achieve a tooth linewidth of 2.0 kHz in a 1-s timescale (750 Hz in 20 ms). The generated per-tooth power of 1 μW ranks this comb among the best ever realized in the mid-infrared in terms of power spectral density.

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