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Multiring large-mode-area delivery fiber for high power
Applied Optics
|November 13, 2013
Summary
This study introduces a novel multiring delivery fiber with a large effective area (400 μm2) for high-power applications. The new fiber design significantly reduces macrobending loss, enabling efficient single-mode operation for advanced laser systems.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- High-power fiber lasers require specialized delivery fibers.
- Conventional step-index fibers have limitations in effective area and bending loss.
Purpose of the Study:
- To design and investigate a novel multiring delivery fiber for high-power applications.
- To enhance effective area and minimize macrobending loss.
Main Methods:
- Utilized the FiberCAD method for fiber design and simulation.
- Calculated effective area and macrobending loss at 1.08 μm.
- Analyzed single-mode operation based on mode-dependent loss.
Main Results:
- Achieved an effective area of 400 μm2, exceeding conventional fibers (~280 μm2).
- Estimated macrobending loss of 1×10(-3) dB/m, one-third of conventional fibers.
- Demonstrated high contrast in macrobending loss for single-mode operation.
Conclusions:
- The novel multiring delivery fiber is a promising candidate for high-power transmission.
- Modified chemical vapor deposition (MCVD) process is suitable for fabricating this fiber design.
