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Updated: Jan 30, 2026

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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
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Transverse mode-switchable fiber laser based on a photonic lantern.
Optics Express
|January 16, 2019
Summary
We developed a fiber laser that can switch between six different light modes. This technology enables independent lasing and control of various transverse modes for advanced optical applications.
Area of Science:
- Optics and Photonics
- Fiber Lasers
- Mode Control
Background:
- Fiber lasers are crucial for various applications.
- Controlling transverse modes in fiber lasers is challenging.
- Few-mode fiber amplifiers offer potential for mode diversity.
Purpose of the Study:
- To demonstrate an intra-cavity transverse mode-switchable fiber laser.
- To achieve independent lasing of the six lowest-order LP modes.
- To enable switching between these modes using a photonic lantern.
Main Methods:
- Utilizing a mode-selective photonic lantern.
- Employing a few-mode Er-doped fiber amplifier.
- Switching modes by altering the input port of the photonic lantern.
Main Results:
- Successfully achieved independent lasing of six LP modes.
- Demonstrated mode switching by changing the photonic lantern input.
- Measured slope efficiency, mode profiles, and spectra for each mode.
- Showcased donut-shaped modes (LP11, LP21) via superposition.
Conclusions:
- The proposed fiber laser design enables effective transverse mode switching.
- This technology provides independent control over multiple spatial modes.
- The demonstrated capabilities are promising for advanced optical systems.
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