研究目的
To review recent demonstrations and studies for 400 Gb/s and beyond client and line side optical interconnect.
研究成果
The study demonstrates the feasibility of 400 Gb/s and beyond optical interconnects using CFP8-LR8 modules and single-carrier DP-QAM signals in unamplified links. It highlights the potential for high data rates and extended transmission distances with current technologies.
研究不足
The study focuses on specific technologies and modules (CFP8-LR8, DP-QAM) and may not cover all aspects of 400 Gb/s and beyond optical interconnects. The experimental conditions are controlled and may not fully represent all real-world scenarios.
1：Experimental Design and Method Selection:
The study reviews demonstrations on 400GE-LR8 CFP8 client pluggable module interoperation and investigates single carrier DP-QAM signal for data center interconnect application in unamplified link.
2：Sample Selection and Data Sources:
Uses CFP8-LR8 modules and single-mode optical fiber (SMF) for transmission.
3：List of Experimental Equipment and Materials:
Viavi optical network tester (ONT), CFP8-LR8 modules, variable optical attenuator (VOA), Juniper physical interface card (PIC), 92-GS/s digital-to-analog converter (DAC), DP-IQ modulator, 16-dBm <100-kHz lasers, analog-to-digital converter (ADC).
4：Experimental Procedures and Operational Workflow:
Measures the performance of 400GE CFP8-LR8 module with SMF transmission, adjusts fiber length and measures BER. Investigates single-carrier QAM signal transmission in unamplified fiber link.
5：Data Analysis Methods:
Adjusts VOA to set transmitter optical output power, measures BER, and interpolates link distance data points at SD-FEC threshold.
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optical network tester
ONT
Viavi
Generate CDAUI-16 signal and perform electrical-to-optical conversion.
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CFP8-LR8 module
CFP8-LR8
Perform electrical-to-optical and optical-to-electrical conversion.
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variable optical attenuator
VOA
Adjust the optical signal power.
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physical interface card
PIC
Juniper
Host the CFP8-LR8 module.
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digital-to-analog converter
DAC
Generate electrical signals for DP-IQ modulator.
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DP-IQ modulator
DP-IQ
Modulate the optical signal.
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laser
Provide input to the DP-IQ modulator and serve as local oscillator for the coherent receiver.
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analog-to-digital converter
ADC
Sample analog signals into discrete digital samples.
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