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Updated: May 1, 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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Midinfrared frequency combs from coherent supercontinuum in chalcogenide and optical parametric oscillation
Optics Letters
|April 2, 2014
Summary
We demonstrate coherent supercontinuum generation in a novel hybrid waveguide. This allows for a wide-wavelength frequency comb, crucial for advanced spectroscopy and optical communications.
Area of Science:
- Nonlinear optics
- Materials science
- Waveguide optics
Background:
- Supercontinuum generation is vital for optical frequency combs.
- Chalcogenide-silica hybrid waveguides offer unique nonlinear properties.
- Maintaining coherence in supercontinuum is essential for applications.
Purpose of the Study:
- To investigate the coherence of supercontinuum generated in a nanospike chalcogenide-silica hybrid waveguide.
- To establish coherent locking between the supercontinuum and a pump laser.
- To generate a broadband, coherent optical frequency comb.
Main Methods:
- Pumping a nanospike chalcogenide-silica hybrid waveguide at 2 μm.
- Interfering the generated supercontinuum with a doubly resonant optical parametric oscillator (OPO).
- Coherent locking of the OPO to a pump laser frequency comb.
Main Results:
- The supercontinuum generated in the hybrid waveguide is shown to be coherent with the pump.
- A composite frequency comb spanning 1 to 6 μm was successfully generated.
- Coherent locking enabled precise frequency control of the comb.
Conclusions:
- Nanospike chalcogenide-silica hybrid waveguides are suitable for coherent supercontinuum generation.
- The demonstrated technique provides a pathway to broadband, coherent frequency combs.
- This work has implications for frequency metrology, spectroscopy, and optical communications.
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