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Cost-effective 400-Gbps micro-intradyne coherent receiver using optical butt-coupling and FPCB wirings
Optics Express
|November 25, 2018
Summary
This study introduces a cost-effective, high-bandwidth coherent receiver using hybrid integration for advanced optical communication. The novel design enables 64-Gbaud data transmission over 1050 km, crucial for future high-speed networks.
Area of Science:
- Optoelectronics
- Integrated Photonics
- Optical Communications
Background:
- Coherent receivers are essential for high-speed optical communication systems.
- Existing designs face limitations in bandwidth and cost-effectiveness.
- Hybrid integration offers a pathway to overcome these challenges.
Purpose of the Study:
- To develop a cost-effective and bandwidth-enhanced micro-intradyne coherent receiver.
- To demonstrate the feasibility of hybrid integration for advanced optical components.
- To achieve high-performance signal transmission for long-haul networks.
Main Methods:
- Hybrid integration of Indium Phosphide (InP) waveguide-photodetector (WG-PD) arrays with silica planar lightwave circuits (PLCs).
- Chip-to-chip bonding and optical butt-coupling for component interconnection.
- Optimization of bondwire inductance to enhance the 3-dB bandwidth of the transimpedance amplifier (TIA).
- Flexible printed circuit boards for electrical RF and DC wirings.
Main Results:
- Achieved a 3-dB bandwidth of approximately 36 GHz, exceeding the typical 29 GHz of commercial TIAs.
- Successfully demonstrated 64-Gbaud dual-polarization 16-Quadrature Amplitude Modulation (DP-16QAM) signal transmission over 1050 km of standard single-mode fiber.
- Maintained a bit error rate below 2 × 10-3 at an optical signal-to-noise ratio of 23.8 dB, meeting forward error correction thresholds.
Conclusions:
- The hybrid integration approach provides a cost-effective solution for high-bandwidth coherent receivers.
- The optimized receiver design significantly enhances performance for long-haul optical communication.
- This technology is promising for next-generation high-speed fiber optic networks.
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