Broad-band continuous-wave parametric wavelength conversion in silicon nanowaveguides

Area of Science:

• Photonics and Optical Engineering
• Materials Science
• Telecommunications

Background:

• Four-wave mixing (FWM) is a key nonlinear optical process for wavelength conversion.
• Silicon nanowaveguides offer a promising platform for integrated photonic devices due to their high nonlinearities and CMOS compatibility.
• Broad-band frequency conversion is crucial for increasing data transmission capacity in optical networks.

Purpose of the Study:

• To demonstrate highly broad-band frequency conversion using four-wave mixing in engineered silicon nanowaveguides.
• To achieve efficient wavelength conversion across multiple telecommunication bands.
• To explore the role of higher-order dispersion in enhancing conversion bandwidth and efficiency.

Main Methods:

• Fabrication of silicon nanowaveguides with precisely engineered dimensions.
• Characterization of nonlinear optical properties and frequency conversion efficiency.
• Utilizing fourth-order dispersion to achieve broad spectral translation.

Main Results:

• Achieved conversion bandwidths exceeding 150 nm.
• Demonstrated peak conversion efficiencies of -9.6 dB.
• Successfully performed wavelength conversion across four telecommunication bands (S-band to U-band) with an efficiency of -12 dB.

Conclusions:

• Engineered silicon nanowaveguides enable highly efficient and broad-band frequency conversion via FWM.
• The demonstrated technology has significant potential for next-generation optical communication systems.
• Control over waveguide dispersion is critical for optimizing nonlinear optical processes in silicon photonics.