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First multi-watt ribbon fiber oscillator in a high order mode
Derrek Drachenberg1, Mike Messerly, Paul Pax
1Lawrence Livermore National Lab, L-491, P.O. Box 808, Livermore, CA 94551, USA. drachenberg1@llnl.gov
Optics Express
|August 14, 2013
Summary
Researchers developed the first doped silica high-order mode ribbon fiber oscillator. This new optical fiber technology achieves over 40 W multimode power and 5 W in a single high-order mode.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Optical fibers are crucial for high-power laser systems.
- Ribbon geometry fibers offer potential for higher power delivery compared to circular fibers.
- Existing fiber oscillators face limitations in maximum achievable power.
Purpose of the Study:
- To demonstrate the first doped silica high-order mode ribbon fiber oscillator.
- To investigate the power scaling capabilities of ribbon fiber technology.
- To achieve high multimode and single high-order mode output power.
Main Methods:
- Fabrication of a doped silica ribbon fiber.
- Construction of a fiber oscillator utilizing the ribbon fiber.
- Characterization of output power and slope efficiency for multimode and high-order mode operation.
Main Results:
- Achieved over 40 W of multimode output power with 71% slope efficiency.
- Demonstrated over 5 W of power in a single high-order mode with 44% slope efficiency.
- Successfully operated the first doped silica high-order mode ribbon fiber oscillator.
Conclusions:
- Doped silica high-order mode ribbon fiber oscillators represent a significant advancement in high-power fiber lasers.
- Ribbon fiber geometry enables power levels exceeding those of conventional circular core fibers.
- This technology opens new avenues for high-power laser applications.
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