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Integrated programmable photonic filter on the silicon-on-insulator platform.
Optics Express
|January 22, 2015
Summary
We developed a compact silicon-on-insulator (SOI) programmable photonic filter using a four-tap finite impulse response structure. This filter offers tunable wavelength, bandwidth, and passband shape via thermal heaters, enabling integration with electronics.
Area of Science:
- Photonics
- Integrated Optics
- Semiconductor Devices
Background:
- Finite Impulse Response (FIR) filters are crucial in signal processing.
- On-chip photonic filters offer miniaturization and integration potential.
- Silicon-on-insulator (SOI) technology provides a robust platform for integrated photonics.
Purpose of the Study:
- To propose and demonstrate a novel on-chip programmable photonic filter.
- To achieve tunability in central wavelength, bandwidth, and passband shape.
- To leverage SOI technology for compact and integrable photonic devices.
Main Methods:
- Implementation of a four-tap FIR structure on SOI.
- Utilizing thermal heaters for amplitude and phase modulation of each tap.
- Characterization of filter programmability and tunability.
Main Results:
- Demonstration of a programmable four-tap FIR photonic filter on SOI.
- Achieved tunability in central wavelength over at least 42% of the free spectral range (FSR).
- Demonstrated bandwidth tuning over at least 50% of the FSR, with variable passband shaping.
Conclusions:
- The proposed SOI-based programmable photonic filter offers high tunability and compactness.
- The design is suitable for integration with electronic circuits.
- This technology advances the development of reconfigurable optical systems.
