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Related Experiment Video

Updated: Mar 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

Narrow-linewidth broadly tunable Yb-doped Q-switched fiber laser using multimode interference filter.

Usha Chakravarty, P K Mukhopadhyay, A Kuruvilla

|May 3, 2017

Summary

This summary is machine-generated.

This study demonstrates a tunable Ytterbium-doped fiber laser with a narrow linewidth. The laser utilizes a multimode interference filter (MMIF) to significantly reduce spectral bandwidth and achieve broad tunability.

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Last Updated: Mar 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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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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Published on: July 12, 2017

Area of Science:

Optics and Photonics
Laser Physics
Materials Science

Background:

Q-switched fiber lasers are crucial for various applications.
Achieving narrow linewidth and broad tunability simultaneously remains a challenge.
Yb-doped fiber lasers offer efficient operation in the near-infrared spectrum.

Purpose of the Study:

To develop a narrow-linewidth, broadly tunable Yb-doped Q-switched fiber laser.
To investigate the effectiveness of a multimode interference filter (MMIF) in controlling laser parameters.
To compare performance in both linear bulk and all-fiber ring cavity resonators.

Main Methods:

Utilized an acousto-optic modulator and an MMIF within a linear bulk cavity resonator.
Employed an all-fiber ring cavity resonator configuration.
Integrated a standard polarization controller (SPC) for spectral tuning.

Main Results:

Reduced spectral bandwidth by two orders of magnitude (from 11 nm to <0.1 nm in linear cavity, 17 nm to <0.1 nm in ring cavity).
Achieved spectral tunability of >16 nm (1057-1073 nm) in the linear cavity and >12 nm (1038-1050 nm) in the ring cavity.
Decreased pulse duration from ~305 ns to ~240 ns with MMIF insertion in the linear cavity.

Conclusions:

The MMIF is effective in significantly narrowing the spectral bandwidth of Q-switched fiber lasers.
The combination of MMIF and SPC enables broad spectral tunability.
The developed laser architecture offers improved performance for applications requiring narrow linewidth and tunable output.