Ultrabroadband Dispersive Radiation by Spatiotemporal Oscillation of Multimode Waves
We show that intense pulses in multimode fiber oscillate in space and time, and that this creates resonant radiation across the electromagnetic spectrum. This work provides a route to tunable sources of ultrashort pulses from IR to ultraviolet and beyond. Dreaming, this work could lead to a fiber-format alternative to the free-electron laser.
The resonant dispersive radiation is diffracted off a grating onto a piece of white paper.