Wide-band polarization controller for Si photonic integrated circuits

Area of Science:

• Integrated photonics
• Optical communications
• Materials science

Background:

• Managing light polarization is crucial for optical communication systems.
• Silicon photonics offers a scalable platform for integrated optical devices.
• Arbitrary polarization control is needed for advanced photonic functionalities.

Purpose of the Study:

• To demonstrate an integrated silicon photonics circuit for arbitrary polarization management.
• To enable adaptation of any polarization state to the fundamental TE mode in silicon waveguides.
• To achieve high-speed polarization control and scrambling.

Main Methods:

• Fabrication of a polarization management circuit on a silicon photonics platform.
• Integration of thermal tuning for high-speed modulation.
• Testing the circuit's performance in a wavelength-division multiplexing (WDM) link.

Main Results:

• Successful demonstration of a circuit managing arbitrary polarization states.
• Adaptation of any input polarization to the standard TE mode of silicon waveguides.
• Achieved kilohertz-speed thermal tuning for polarization scrambling.
• Successfully integrated four WDM channels into a standard silicon photonic integrated circuit.

Conclusions:

• The demonstrated silicon photonics circuit provides versatile control over light polarization.
• This technology facilitates the integration of complex optical functions onto a single chip.
• The high-speed scrambling capability opens possibilities for advanced optical signal processing and secure communication.