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Bipolar tap photonic microwave notch filter using electroabsorption modulator-integrated distributed feedback laser
You Min Chang1, Junsu Lee, Ju Han Lee
1School of Electrical and Computer Engineering, Faculty of Engineering, University of Seoul, 13 Siripdae-gil, Dongdaemun-gu, Seoul 130-743, South Korea.
Applied Optics
|January 26, 2011
Summary
We developed a novel bipolar tap photonic microwave notch filter using integrated laser diodes. This semiconductor-based device achieves tunable notch filtering with high depth, enabling advanced microwave signal processing.
Area of Science:
- Photonics
- Electrical Engineering
- Materials Science
Background:
- Photonic microwave filters are crucial for modern wireless communication systems.
- Existing filters often face challenges in integration and tunability.
- Electroabsorption modulators (EAMs) offer potential for compact and efficient photonic devices.
Purpose of the Study:
- To propose and experimentally demonstrate a novel bipolar tap photonic microwave notch filter.
- To achieve a fully integrated, semiconductor-based notch filter solution.
- To enable tunable notch frequency with high notch depth.
Main Methods:
- Utilizing two electroabsorption modulator (EAM)-integrated distributed feedback laser diodes in parallel.
- Leveraging the negative and positive slopes of U-shaped electro-optic transfer functions of EAMs.
- Implementing notch frequency tuning by adjusting laser wavelength spacing via temperature control.
Main Results:
- Successful experimental verification of the bipolar tap photonic microwave notch filter principle.
- Demonstration of notch frequency tuning with a range of approximately 1.8 GHz.
- Achieved a high notch depth of approximately 40 dB.
Conclusions:
- The proposed bipolar tap scheme enables a fully integrated, semiconductor-based photonic microwave notch filter.
- The device offers effective and tunable notch filtering with significant depth.
- This technology holds promise for advanced microwave signal processing applications.
