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Self-phase modulation in highly confined submicron Ta2O5 channel waveguides
Optics Express
|September 24, 2016
Summary
Tantalum pentoxide (Ta2O5) waveguides show significant optical spectra broadening due to self-phase modulation. This demonstrates Ta2O5
Area of Science:
- Photonics and optical materials science.
- Nonlinear optics and integrated photonics.
Background:
- Nonlinear optical phenomena are crucial for advanced photonic devices.
- Tantalum pentoxide (Ta2O5) is explored for its potential in optical applications.
Purpose of the Study:
- To investigate optical spectra broadening via self-phase modulation in Ta2O5 channel waveguides.
- To determine the nonlinear optical properties of Ta2O5 films.
Main Methods:
- Fabrication of Ta2O5 channel waveguides using RF sputtering.
- Measurement of optical spectra broadening using 800 nm pulses.
- Application of the method of moments for theoretical analysis.
Main Results:
- Observed optical spectra broadening of 42.5 nm (TE) and 31.7 nm (TM) at 800 nm wavelength.
- Extracted nonlinear Kerr coefficients: 2.14 × 10^-14 cm²/W (TE) and 1.92 × 10^-14 cm²/W (TM).
Conclusions:
- Ta2O5 exhibits significant nonlinear optical properties.
- Ta2O5 is a promising material for developing nonlinear waveguide devices in integrated photonics.
