Abstract

Delivery of high peak-power femtosecond pulses with fibers is constrained by nonlinear distortions accumulated during pulse propagation. We address this problem with a novel, to our knowledge, fiber schematic, where the pulse propagates in a small Aeff (18μm2) but highly dispersive (record value of 900psnmkm) medium, enabled by transmission in the LP02 mode of a few-mode fiber. The novel fiber yields a low dispersion-to-nonlinear-length ratio (due to its large dispersion) despite its small Aeff, hence enabling mitigation of nonlinearities. This enables fiber delivery of distortion-free <150fs, 1nJ, and 840nm pulses—an order-of-magnitude improvement over single-mode fibers of similar Aeff.

© 2005 Optical Society of America

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