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Updated: Dec 7, 2025

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

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Multi-wavelength random fiber laser with switchable wavelength interval.

Ping Huang, Xuewen Shu, Zuxing Zhang

|September 29, 2020

Summary

This summary is machine-generated.

This study introduces a flexible random fiber laser capable of switching wavelength intervals using two novel methods. These techniques enhance multi-wavelength light source functionality for broader applications.

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Area of Science:

Photonics and Laser Technology
Optical Engineering

Background:

Random fiber lasers offer unique light source properties.
Existing multi-wavelength sources often lack flexibility in interval tuning.

Purpose of the Study:

To propose and demonstrate a random fiber laser with switchable wavelength intervals.
To enhance the flexibility and functionality of multi-wavelength light sources.

Main Methods:

Cavity structure modification using 980 nm laser diodes (LDs) and erbium-doped fibers (EDFs) to switch between single and double Brillouin frequency shifts (BFS).
Gain manipulation via controlling the power of three 980 nm LDs in EDF amplifiers for optical wavelength interval switching.

Main Results:

Achieved switching of wavelength intervals from a single BFS (0.088 nm) to a double BFS (0.176 nm) using structural changes.
Demonstrated optical switching of wavelength intervals by manipulating amplifier gain.

Conclusions:

The developed switchable random fiber laser offers increased flexibility and functionality.
Simple alternative switching mechanisms cater to diverse application requirements.