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  • Title: 250-MHz synchronously pumped optical parametric oscillator at 2.25-2.6 μm and 4.1-4.9 μm.
    Author: Coluccelli N, Fonnum H, Haakestad M, Gambetta A, Gatti D, Marangoni M, Laporta P, Galzerano G.
    Journal: Opt Express; 2012 Sep 24; 20(20):22042-7. PubMed ID: 23037354.
    Abstract:
    A compact and versatile femtosecond mid-IR source is presented, based on an optical parametric oscillator (OPO) synchronously pumped by a commercial 250-MHz Er:fiber laser. The mid-IR spectrum can be tuned in the range 2.25-2.6 μm (signal) and 4.1-4.9 μm (idler), with average power from 20 to 60 mW. At 2.5 μm a minimum pulse duration of 110 fs and a power of 40 mW have been obtained. Active stabilization of the OPO cavity length has been achieved in the whole tuning range.
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