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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
Tellurite microstructure fibers with small hexagonal core for supercontinuum generation.
Meisong Liao1, Chitrarekha Chaudhari, Guanshi Qin
1Research Center for Advanced Photon Technology, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan.
Optics Express
|July 8, 2009
Summary
Researchers developed novel tellurite glass microstructure fibers with hexagonal cores. Adjusting the holey region diameter ratio significantly impacts dispersion, nonlinearity, and supercontinuum generation, enabling new optical applications.
Area of Science:
- Materials Science
- Optical Engineering
- Photonics
Background:
- Microstructure fibers offer unique optical properties.
- Tellurite glasses are promising for nonlinear optics.
- Controlling fiber geometry is key to tailoring optical performance.
Purpose of the Study:
- To fabricate hexagonal core tellurite glass microstructure fibers.
- To investigate the influence of the holey region diameter ratio (DRHC) on fiber properties.
- To demonstrate applications in nonlinear optical phenomena.
Main Methods:
- Accurate control of the temperature field during fiber drawing.
- Adjusting the diameter ratio of the holey region to the core (DRHC) by applying positive pressure.
- Characterization of chromatic dispersion, cutoff wavelength, and nonlinear coefficient.
- Experimental generation of third harmonic generation and supercontinuum spectra.
Main Results:
- Successfully fabricated hexagonal core tellurite glass fibers with a 1 µm core size.
- DRHC was tunable from 1 to 20, significantly shifting zero dispersion wavelengths.
- Increased DRHC led to higher nonlinear coefficients (up to 5.7 W⁻¹/m) and longer cutoff wavelengths.
- Demonstrated efficient visible third harmonic generation and octave-spanning supercontinuum generation.
Conclusions:
- The study presents the first fabrication of hexagonal core soft glass fibers with sub-micron cores.
- The DRHC is a critical parameter for engineering dispersion, nonlinearity, and supercontinuum generation.
- These fibers show great potential for advanced nonlinear optical applications.
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