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Updated: May 2, 2026
09:39
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
12.4K
Cascaded geometric parametric process in a tapered air-silica graded-like multimode microstructure fiber
Optics Letters
|September 13, 2024
Summary
Researchers explored spectral broadening in a microstructure fiber taper. This study reveals a competition between Raman and Kerr effects, generating unique spectral sidebands and a broad supercontinuum.
Area of Science:
- Optics and Photonics
- Nonlinear Fiber Optics
Background:
- Multimode fibers support complex light propagation.
- Microstructure fiber tapers offer unique optical properties.
Purpose of the Study:
- To investigate spatial beam profile and spectral broadening in a specific fiber taper.
- To analyze the interplay of nonlinear effects in multimode frequency conversion.
Main Methods:
- Experimental study using a 1064 nm pulsed laser.
- Utilizing an air-silica microstructure fiber taper with increasing diameter.
- Analyzing output beam profile and spectral characteristics.
Main Results:
- Observed competition between Raman beam cleanup and Kerr beam self-cleaning.
- Generated spectral sidebands with significant frequency detuning from the pump.
- Achieved a supercontinuum spanning 500 nm to 2.5 µm.
Conclusions:
- Multimode frequency conversion in this fiber enables generation of hard-to-obtain spectral features.
- The fiber taper facilitates broadband supercontinuum generation.
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