Mid-infrared fibre-based optical comb

Details Mid-infrared fibre-based optical comb Mid-infrared fibre-based optical comb

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006njph....8..262m&link_type=abstract

New Journal of Physics, Volume 8, Issue 11, pp. 262 (2006).

Physics

9

Scientific paper

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.

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