Abstract

We demonstrate a method of generating short pulses at 1350nm by exciting Čerenkov radiation in a higher-order-mode fiber with a 1064nm femtosecond fiber laser. We measure a 106fs, 0.66nJ output pulse. Čerenkov radiation in fibers allows for energy transfer between a soliton and a dispersive wave, providing an effective and engineerable platform to shift the wavelength of a femtosecond source. With appropriate design of the higher-order-mode fiber, this method of generating short pulses at 1350nm can be extended to other wavelengths and to higher pulse energies.

© 2007 Optical Society of America

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