DTU Fotonik, Technical University of Denmark, Lyngby DK-2800 Kgs., Denmark.
Opt Lett. 2012 Jul 1;37(13):2769-71. doi: 10.1364/OL.37.002769.
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.
据我们所知，这是首次报道全光纤飞秒光谱隔离切伦科夫辐射源。我们使用单片自启动飞秒掺镱光纤激光器作为泵浦源，结合光子晶体光纤作为波导转换介质，在可见波长 580-630nm 范围内演示了毫瓦级、稳定可调谐、脉宽小于 160fs 的切伦科夫辐射，3dB 光谱带宽不超过 36nm。这种全光纤切伦科夫辐射源有望在生物光子学等实际应用中得到应用，如生物成像和显微镜。
