Lee Jennifer H, van Howe James, Xu Chris, Ramachandran Siddharth, Ghalmi Samir, Yan Man F
School of Applied and Engineering Physics, Cornell University, New York 14853, USA.
Opt Lett. 2007 May 1;32(9):1053-5. doi: 10.1364/ol.32.001053.
We demonstrate a method of generating short pulses at 1350 nm by exciting Cerenkov radiation in a higher-order-mode fiber with a 1064 nm femtosecond fiber laser. We measure a 106 fs, 0.66 nJ output pulse. Cerenkov 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 1350 nm can be extended to other wavelengths and to higher pulse energies.
