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Microwave photonic phase shifter based on birefringence effects in a semiconductor optical amplifier
Han Chen1, Mingming Sun, Yi Ding
1National Research Center for Optical Sensing/Communications Integrated Networking, Southeast University, Sipailou 2, Nanjing 210096, China.
Optics Letters
|August 31, 2013
Summary
This study presents a novel microwave photonic phase shifter using a semiconductor optical amplifier (SOA) for continuous tuning. The device achieves a phase-shift tuning range beyond 2π radians by controlling SOA launch power.
Area of Science:
- Photonics
- Microwave Engineering
- Semiconductor Devices
Background:
- Microwave photonic (MWP) devices are crucial for high-frequency signal processing.
- Tunable phase shifters are essential components in advanced MWP systems.
- Semiconductor optical amplifiers (SOAs) offer unique nonlinear optical properties.
Purpose of the Study:
- To present a continuously tunable MWP phase shifter.
- To explain the theoretical principles based on birefringence in an SOA.
- To demonstrate a prototype with a wide tuning range.
Main Methods:
- Theoretical analysis of birefringence effects in an SOA.
- Design of an MWP phase shifter utilizing an SOA.
- Experimental demonstration of a prototype device.
Main Results:
- A continuously tunable MWP phase shifter is proposed and designed.
- The device achieves a phase-shift tuning range exceeding 2π radians.
- A prototype operating at 10 GHz with a 2π rad tuning range was successfully demonstrated.
Conclusions:
- The proposed SOA-based MWP phase shifter offers efficient and wide-range continuous tuning.
- Controlling SOA launch power is key to achieving the broad phase-shift tuning.
- The experimental validation confirms the device's potential for practical applications.
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