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Electro-optical tunable time delay and advance in a silicon feedback-microring resonator
Shaoqi Feng1, Xianshu Luo, Shengwang Du
1Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China.
Optics Letters
|April 12, 2011
Summary
We demonstrate tunable time delay and advance using a silicon microring resonator. This electro-optical method achieves a wide dynamic time tuning range with minimal voltage changes, enabling precise signal manipulation.
Area of Science:
- Photonics
- Optical Communications
- Semiconductor Devices
Background:
- Accurate control of signal timing is crucial in optical communication systems.
- Existing methods for time delay tuning often face limitations in dynamic range or power consumption.
Purpose of the Study:
- To demonstrate electro-optical tunable time delay and advance.
- To achieve a large dynamic time tuning range using a silicon-based device.
Main Methods:
- Integration of a silicon feedback-microring resonator with p-i-n diodes.
- Utilizing carrier-injection-based free-carrier dispersion for controlling feedback and phase shifts.
- Applying a DC bias voltage for dynamic tuning.
Main Results:
- Achieved a large dynamic time tuning range from -88 ps to 110 ps.
- Demonstrated tuning with DC bias voltage changes in the millivolt range.
- Showcased tunable time delay and advance across a 0.76 nm wavelength range.
Conclusions:
- The silicon feedback-microring resonator offers an effective method for electro-optical time delay tuning.
- The device provides a wide tuning range and high precision, suitable for advanced optical systems.
- This technology has potential applications in optical signal processing and telecommunications.
