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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
Supercontinuum generation in dispersion engineered highly nonlinear (gamma = 10 /W/m) As2S3) chalcogenide planar
Michael R Lamont1, Barry Luther-Davies, Duk-Yong Choi
1Centre for Ultrahigh-bandwidth Devices for Optical Systems, School of Physics, University of Sydney, NSW 2006, Australia.
Optics Express
|September 17, 2008
Summary
We achieved broadband supercontinuum generation using a novel chalcogenide waveguide. This advancement in nonlinear optics enables wider spectral generation for various applications.
Area of Science:
- Nonlinear Optics
- Materials Science
Background:
- Supercontinuum generation is crucial for spectroscopy and optical communications.
- Chalcogenide materials offer high nonlinearity for enhanced optical effects.
Purpose of the Study:
- To demonstrate supercontinuum generation in a dispersion-engineered As(2)S(3) planar waveguide.
- To achieve a broad bandwidth supercontinuum using low peak power pulses.
Main Methods:
- Fabrication of a 60 mm long As(2)S(3) planar waveguide with a 2 µm x 870 nm cross-section.
- Dispersion engineering for anomalous dispersion at near-infrared wavelengths.
- Input of 610 fs pulses with 68 W peak power.
Main Results:
- Generation of supercontinuum with a 750 nm bandwidth (30 dB).
- Achieved a nonlinear parameter of 10 /W/m and dispersion of +29 ps/nm/km.
- Experimental results align well with theoretical predictions.
Conclusions:
- The As(2)S(3) planar waveguide is effective for broadband supercontinuum generation.
- Dispersion engineering is key to achieving wide spectral bandwidths.
- This work paves the way for compact supercontinuum sources.
