Related Experiment Video
Updated: Dec 9, 2025
09:39
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
Published on: May 27, 2013
12.7K
Mid-infrared supercontinuum generation in silicon-germanium all-normal dispersion waveguides
Optics Letters
|September 15, 2020
Summary
We achieved octave-spanning supercontinuum generation in a silicon germanium waveguide using short infrared pulses. This coherent light source shows potential for ultrafast pulse compression down to 22 femtoseconds.
Area of Science:
- Photonics
- Materials Science
- Optoelectronics
Background:
- Supercontinuum generation is crucial for various spectroscopic and photonic applications.
- Silicon photonics offers a scalable platform for integrated optical devices.
- Engineering waveguide dispersion is key to controlling nonlinear optical processes.
Purpose of the Study:
- To demonstrate octave-spanning coherent supercontinuum generation.
- To utilize silicon germanium-on-silicon waveguides for broadband light generation.
- To explore the potential for ultrafast pulse compression.
Main Methods:
- Utilizing ~200 fs pulses at a 4 µm wavelength.
- Engineering a silicon germanium-on-silicon waveguide for low all-normal dispersion in TM polarization.
- Validating supercontinuum coherence through simulations.
Main Results:
- Achieved coherent supercontinuum generation spanning over an octave.
- Demonstrated high coherence across the entire generated spectrum.
- Simulations confirmed the coherence properties of the supercontinuum.
Conclusions:
- The generated supercontinuum is highly coherent.
- The silicon germanium waveguide platform is suitable for broadband light generation.
- The results suggest potential for pulse compression down to 22 fs.
