Fully stabilized mid-infrared frequency comb for high-precision molecular spectroscopy

Markku Vainio, Juho Karhu

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

A fully stabilized mid-infrared optical frequency comb spanning from 2.9 to 3.4 µm is described in this article. The comb is based on half-harmonic generation in a femtosecond optical parametric oscillator, which transfers the high phase coherence of a fully stabilized near-infrared Er-doped fiber laser comb to the mid-infrared region. The method is simple, as no phase-locked loops or reference lasers are needed. Precise locking of optical frequencies of the mid-infrared comb to the pump comb is experimentally verified at sub-20 mHz level, which corresponds to a fractional statistical uncertainty of 2 * 10-16 at the center frequency of the mid-infrared comb. The fully stabilized mid-infrared comb is an ideal tool for high-precision molecular spectroscopy, as well as for optical frequency metrology in the mid-infrared region, which is difficult to access with other stabilized frequency comb techniques.
Original languageEnglish
Pages (from-to)4190-4200
Number of pages11
JournalOptics Express
Volume25
Issue number4
DOIs
Publication statusPublished - 20 Feb 2017
MoE publication typeA1 Journal article-refereed

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molecular spectroscopy
phase coherence
parametric amplifiers
metrology
locking
fiber lasers
harmonic generations
pumps
lasers

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Vainio, Markku ; Karhu, Juho. / Fully stabilized mid-infrared frequency comb for high-precision molecular spectroscopy. In: Optics Express. 2017 ; Vol. 25, No. 4. pp. 4190-4200.
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Fully stabilized mid-infrared frequency comb for high-precision molecular spectroscopy. / Vainio, Markku; Karhu, Juho.

In: Optics Express, Vol. 25, No. 4, 20.02.2017, p. 4190-4200.

Research output: Contribution to journalArticleScientificpeer-review

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