All-fiber femtosecond Cherenkov radiation source |
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Authors: | Liu Xiaomin Lægsgaard Jesper Møller Uffe Tu Haohua Boppart Stephen A Turchinovich Dmitry |
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Affiliation: | DTU Fotonik, Technical University of Denmark, Lyngby DK-2800 Kgs., Denmark. |
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Abstract: | An all-fiber femtosecond source of spectrally isolated Cherenkov radiation is reported, to the best of our knowledge, for the first time. Using a monolithic, self-starting femtosecond Yb-doped fiber laser as the pump source and the combination of photonic crystal fibers as the wave-conversion medium, we demonstrate milliwatt-level, stable, and tunable Cherenkov radiation at visible wavelengths 580-630 nm, with pulse duration of sub-160-fs, and the 3 dB spectral bandwidth not exceeding 36 nm. Such an all-fiber Cherenkov radiation source is promising for practical applications in biophotonics such as bioimaging and microscopy. |
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