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Distribution and Dispersion

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Related Experiment Video

Updated: Feb 3, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Normal-dispersion fiber optical parametric chirped-pulse amplification.

Walter Fu, Frank W Wise

|November 2, 2018

Summary

We developed a fiber optical parametric chirped-pulse amplifier for generating ultrashort laser pulses. This scalable method produces microjoule-level, femtosecond pulses at new wavelengths.

Area of Science:

Nonlinear Optics
Fiber Optics
Laser Physics

Background:

Fiber optical parametric amplifiers (FOPAs) are crucial for generating tunable laser pulses.
Chirped-pulse amplification (CPA) is a technique for amplifying ultrashort laser pulses without damaging the gain medium.
Conventional FOPAs often operate in the anomalous dispersion regime, limiting scalability.

Purpose of the Study:

To demonstrate a fiber optical parametric chirped-pulse amplifier (FOP-CPA) operating in the normally dispersive regime.
To establish a scalable route for generating microjoule-level, femtosecond pulses at new wavelengths.
To investigate the performance of FOP-CPA in terms of pulse energy and duration.

Main Methods:

Utilized a fiber optical parametric amplifier.

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Last Updated: Feb 3, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Employed chirped-pulse amplification (CPA) in the normally dispersive regime.

Pumped the amplifier with chirped pulses at 1.03 μm and seeded with a continuous-wave beam at 0.85 μm.

Main Results:

Successfully generated idler pulses at 1.3 μm.
Achieved pulse durations as short as 210 femtoseconds (fs).
Obtained pulse energies as high as 180 nanojoules (nJ).

Conclusions:

The normally dispersive FOP-CPA is a scalable approach for generating high-energy, ultrashort pulses.
This technique offers a versatile platform for accessing new wavelengths with femtosecond pulse durations.
The demonstrated system paves the way for advancements in various applications requiring tailored laser pulses.