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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
Multiwatt octave-spanning supercontinuum generation in multicore photonic-crystal fiber
Xiao-hui Fang1, Ming-lie Hu, Li-li Huang
1Ultrafast Laser Laboratory, College of Precision Instruments and Opto-electronics Engineering, Tianjin University, 300072 Tianjin, China.
Optics Letters
|June 29, 2012
Summary
Researchers generated a high-power supercontinuum using a femtosecond fiber laser and multicore photonic crystal fiber (PCF). Long PCFs enabled robust, high-quality supercontinuum output across a wide wavelength range.
Area of Science:
- Nonlinear optics
- Photonics
- Laser physics
Background:
- Supercontinuum generation is crucial for various applications, including spectroscopy and optical communications.
- Traditional methods often face limitations in power, spectral range, or beam quality.
Purpose of the Study:
- To achieve high-power, octave-spanning supercontinuum generation.
- To investigate the use of long multicore photonic crystal fibers (PCFs) for enhanced supercontinuum properties.
Main Methods:
- Utilized a high-power femtosecond fiber laser amplifier.
- Employed long (up to 20 m) multicore nonlinear photonic crystal fibers (PCFs).
- Analyzed the suppression of higher-order modes through evanescent field coupling.
Main Results:
- Generated a supercontinuum spanning over an octave (500-1700 nm).
- Achieved a robust 5.4 W coherent supercontinuum output.
- Demonstrated supercontinuum generation in an isolated fundamental supermode with high spatial and spectral quality.
Conclusions:
- Long multicore PCFs are effective for generating high-quality, high-power supercontinua.
- Evanescent field coupling in multicore PCFs suppresses unwanted modes, enhancing output characteristics.
- This technique offers a promising route for advanced photonic applications requiring broadband coherent light sources.
