Author:
Haig Henry,Bender Nicholas,Eisenberg Yishai,Wise Frank W.
Abstract
We show that regenerative amplification enables a femtosecond fiber amplifier with an unprecedented combination of features: single-mode operation (M2≤ 1.3) despite multimode (100 μm) fiber, high-gain (> 55 dB), and high pulse energy (> 50 μJ).