Highly coherent tunable mid-infrared frequency comb pumped by supercontinuum at 1 µm

We report a tunable mid-infrared frequency comb working at 184 MHz, which is based on difference frequency generation in a periodically poled Mg-doped stoichiometric lithium tantalate (PPMgSLT) crystal pumped by high-power supercontinuum pulses. Supercontinuum pulses from two fibers with different d...

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Bibliographic Details
Published in:Applied physics express 2016-12, Vol.10 (1), p.12503
Main Authors: Jin, Lei, Yamanaka, Masahito, Sonnenschein, Volker, Tomita, Hideki, Iguchi, Tetsuo, Sato, Atsushi, Oh-hara, Toshinari, Nishizawa, Norihiko
Format: Article
Language:English
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Summary:We report a tunable mid-infrared frequency comb working at 184 MHz, which is based on difference frequency generation in a periodically poled Mg-doped stoichiometric lithium tantalate (PPMgSLT) crystal pumped by high-power supercontinuum pulses. Supercontinuum pulses from two fibers with different dispersion properties were examined. With a photonic crystal fiber (PCF) having normal dispersion properties, a tunable wavelength range of 2.9-4.7 µm was achieved. With another PCF having zero dispersion at 1040 nm, a maximum power of 1.34 mW was observed at 3.9 µm. The high coherence of the pulses generated with this scheme was verified experimentally, and a fringe visibility of 0.90 was observed.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.10.012503