title: High-coherence mid-infrared frequency comb.
abstract: 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.
authors: I
authors: I
authors: Galli
authors: F
authors: F
authors: Cappelli
authors: P
authors: P
authors: Cancio
authors: G
authors: G
authors: Giusfredi
authors: D
authors: D
authors: Mazzotti
authors: S
authors: S
authors: Bartalini
authors: P
authors: P
authors: De Natale