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Updated: Feb 3, 2026

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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
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All-fiberized, multi-watt 2-5-μm supercontinuum laser source based on fluoroindate fiber with record conversion
Optics Letters
|November 2, 2018
Summary
Researchers developed a novel all-fiberized supercontinuum laser source using fluoroindate (InF3) fiber. This system achieves record output power and conversion efficiency in the mid-infrared region.
Area of Science:
- * Photonics and Laser Technology
- * Materials Science (Fiber Optics)
Background:
- * Supercontinuum (SC) generation is crucial for various spectroscopic applications.
- * Mid-infrared (MIR) SC sources are highly sought after but challenging to develop.
- * Fluoroindate (InF3) fibers offer potential for MIR SC generation due to their unique properties.
Purpose of the Study:
- * To demonstrate a strictly all-fiberized, multi-watt supercontinuum laser source operating in the 2-5 μm range.
- * To achieve high conversion efficiency for MIR SC generation.
- * To establish new records for output power and efficiency in InF3-fiber-based SC sources.
Main Methods:
- * Utilized a broadband thulium-doped fiber amplifier (2-2.7 μm) to pump a single-mode InF3 fiber.
- * Achieved a low-loss (0.07 dB) fusion-spliced joint between silica and InF3 fibers for an all-fiber structure.
- * Optimized pump power coupling and fiber parameters for efficient SC generation.
Main Results:
- * Generated a 1.35-W SC with 1.5-5.2 μm spectral coverage and 59.5% conversion efficiency.
- * Achieved a 4.06-W SC with 1.9-5.1 μm spectral coverage and 63.3% conversion efficiency.
- * Demonstrated excellent power stability with a normalized root mean square superior to 0.4%.
Conclusions:
- * This work presents the highest output power and conversion efficiency for InF3-fiber-based MIR-SC laser sources to date.
- * The study reports the first strictly all-fiberized SC generation in InF3 fibers.
- * The developed source offers a stable and efficient solution for MIR applications.
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