Coherence Properties Of A 2.6-7.5 Μm Frequency Comb Produced As A Subharmonic Of A Tm-Fiber Laser

Abstract

We study the temporal coherence of an ultrabroadband frequency comb produced in a degenerate GaAs optical parametric oscillator (OPO) pumped by a stabilized Tm-fiber comb, by observing multiheterodyne beats in the RF domain. We infer that in such a regime the OPO automatically produces a stable frequency comb that is phase and frequency locked to the pump. By varying intracavity dispersion, we achieve a comb spanning 2.6-7.5 μm at a -20 dB level. Low pump threshold (down to 7 mW), high average power (up to 73 mW), broad spectral coverage, flat spectrum, and high coherence make this comb a source suitable for various applications, foremost dual-comb molecular spectroscopy.

Publication Date

4-1-2016

Publication Title

Optics Letters

Volume

41

Issue

7

Number of Pages

1388-1391

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.41.001388

Socpus ID

84964507724 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84964507724

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