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Dispersive-wave-based octave-spanning supercontinuum generation in InGaP membrane waveguides on a silicon substrate
Optics Letters
|August 11, 2015
Summary
We generated an octave-spanning supercontinuum using Indium Gallium Phosphide (InGaP) waveguides. This broadband light source is highly coherent, paving the way for new photonic applications.
Area of Science:
- Photonics
- Materials Science
- Optics
Background:
- Supercontinuum generation is crucial for various photonic applications.
- High-index-contrast waveguides offer unique dispersion properties.
- Low nonlinear loss materials are essential for efficient supercontinuum generation.
Purpose of the Study:
- To demonstrate octave-spanning supercontinuum generation in InGaP membrane waveguides.
- To investigate the mechanisms enabling broadband generation in these waveguides.
- To assess the coherence properties of the generated supercontinuum.
Main Methods:
- Fabrication of InGaP membrane waveguides on a silicon substrate.
- Pumping the waveguides with a 1550-nm femtosecond laser source.
- Characterization of the output supercontinuum spectra and coherence properties.
Main Results:
- Generation of an octave-spanning supercontinuum.
- Observation of dispersive wave generation on both sides of the pump.
- Confirmation of low nonlinear losses in the InGaP material.
- Measurement of high coherence in the output spectra near the pump wavelength.
Conclusions:
- InGaP membrane waveguides support octave-spanning supercontinuum generation.
- Dispersive wave generation and low nonlinear losses are key mechanisms.
- The generated supercontinuum exhibits high coherence, suitable for advanced applications.
