title: All-fiber femtosecond Cherenkov radiation source.
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.
authors: DTU Fotonik, Technical University of Denmark, Lyngby DK-2800 Kgs., Denmark.
authors: Xiaomin
authors: X
authors: Liu
authors: Jesper
authors: J
authors: Lægsgaard
authors: Uffe
authors: U
authors: Møller
authors: Haohua
authors: H
authors: Tu
authors: Stephen A
authors: SA
authors: Boppart
authors: Dmitry
authors: D
authors: Turchinovich
mesh_terms: D060733:Electromagnetic Radiation; D055100:Optical Fibers; D013057:Spectrum Analysis; D013997:Time Factors