Supercontinuum generation in silicon photonic wires

Area of Science:

• Photonics
• Nonlinear Optics
• Materials Science

Background:

• Silicon photonic wire waveguides are crucial for integrated optics.
• Ultrashort optical pulse propagation can induce nonlinear effects.
• Spectral broadening is a key phenomenon in nonlinear light-matter interactions.

Purpose of the Study:

• To investigate spectral broadening of ultrashort optical pulses in silicon photonic wire waveguides.
• To analyze the relationship between spectral features, waveguide dispersion, and input power.
• To explore the role of higher-order soliton radiative effects.

Main Methods:

• Propagation of 1.3-mum-wavelength ultrashort optical pulses through a 4.7-mm silicon-photonic-wire waveguide.
• Measurement of spectral broadening exceeding 350 nm (3/10-octave span).
• Analysis of wavelength dependence of spectral features and correlation with waveguide dispersion and input power.

Main Results:

• Observed spectral broadening of over 350 nm.
• Demonstrated wavelength dependence of spectral features.
• Input power and waveguide dispersion were identified as key factors influencing spectral characteristics.
• Experimental results showed partial consistency with higher-order soliton radiative effects.

Conclusions:

• Silicon photonic wire waveguides facilitate significant spectral broadening of ultrashort optical pulses.
• Higher-order soliton radiative effects contribute to the observed spectral dynamics.
• Understanding these nonlinear phenomena is vital for designing advanced photonic devices.