Supercontinuum Generation in Nonperiodic Photonic Crystal Fibers and its Application in Frequency Metrology

Abstract

We generated supercontinuum by utilizing photonic crystal fibers with randomly distributed air holes in the cladding and successfully applied it to optical frequency metrology. Ultra-broad spectra covering a range from the UV to the near infrared were obtained by launching 80 fs Ti: sapphire laser pulses into nonperiodic photonic crystal fibers. In the meanwhile, the experimental results revealed that the distribution of the output spectrum depended on the polarization state of the seeding pulses. Besides, taking advantage of this supercontinuum, we also acquired the clear beat signals by using a new scheme in optical frequency metrology.