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Updated: Aug 20, 2026
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
High-repetition-rate coherent femtosecond pulse amplification with an external passive optical cavity
1JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Boulder, Colorado 80309-0440, USA. rjjones@jilau1.colorado.edu
Abstract:
We demonstrate a general technique for enhancement of femtosecond pulses from a pulse train through their coherent buildup inside a high-finesse cavity. Periodic extraction of the intracavity pulse by means of a fast switch provides a net energy gain of 42 to >70 times for 38-58-fs pulse durations. Starting with an actively stabilized but otherwise standard mode-locked laser system, we demonstrate pulses of >200-nJ energy.
