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Published on: February 6, 2014
Planar-lightwave-circuit-based duplexer for gigabit-capable passive optical network/gigabit Ethernet passive optical
Jong-Kyun Hong1, Sang-Sun Lee, Sang-Yeob Na
1Communications Research Laboratory, Division of Electronics and Computer Engineering, Hanyang University, 17 Hangdang-Dong, Sungdong-Ku, Seoul 133-791, Korea. holyhjk@hanyang.ac.kr
Applied Optics
|April 14, 2009
Summary
We developed a compact duplexer using multimode interference for passive optical networks. This efficient device demonstrates excellent performance for gigabit Ethernet applications, with low return power.
Area of Science:
- Photonics and Optical Engineering
- Telecommunications Technology
Background:
- Passive optical networks (PONs) are crucial for high-speed internet access.
- Efficient duplexers are essential components in PON systems for signal separation.
Purpose of the Study:
- To propose and experimentally validate a compact and efficient duplexer.
- To leverage multimode interference (MMI) and extraneous self-imaging for optical signal management.
Main Methods:
- Designed a duplexer utilizing the multimode interference (MMI) effect.
- Fabricated silica-based MMI couplers for experimental testing.
- Evaluated performance using light sources at 1310 nm and 1490 nm wavelengths.
Main Results:
- The duplexer exhibited relative output powers of -0.3 dBm (1490 nm) and -0.7 dBm (1310 nm).
- Achieved a return power of less than -40 dBm, indicating high signal isolation.
Conclusions:
- The proposed MMI-based duplexer is a viable solution for gigabit-capable passive optical networks.
- The device offers a compact and efficient design with excellent optical performance characteristics.
