Scientific Results

Mid-infrared fibre-based optical comb

Year: 2006

Authors: Maddaloni P., Malara P., Gagliardi G., De Natale P.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata and European Laboratory for NonLinear Spectroscopy (LENS), Comprensorio “A. Olivetti”, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy

Abstract: An optical frequency synthesizer (OFS), based on difference-frequency generation (DFG), is demonstrated at 3 µm. By mixing a near-infrared (IR) OFS and a tunable continuous-wave (CW) laser in a periodically poled lithium-niobate (PPLN) crystal, a new comb is created from 2.9 to 3.5 µm (in 180 nm wide spans) with a 100 MHz mode spacing. By phase-locking, the pump laser to the near-IR OFS, the mid-IR comb is directly linked to the Cs primary standard via a global positioning system (GPS) time receiver. Then, the compactness of our fibre-based set-up opens real perspectives for the realization of transportable mid-IR frequency standards.

Journal/Review: NEW JOURNAL OF PHYSICS

Volume: 8      Pages from: 262-1  to: 262-8

KeyWords: Continuous wave lasers; Frequency standards; Global positioning system; Infrared radiation; Lithium niobate; Signal receivers; Single crystals, Difference-frequency generation (DFG); Optical frequency synthesizer (OFS); Poled lithium-niobate (PPLN) crystal, Optical fibers
DOI: 10.1088/1367-2630/8/11/262

Citations: 58
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