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Single channel 112Gbit/sec PAM4 at 56Gbaud with digital signal processing for data centers applications
Optics Express
|April 4, 2015
Summary
This study demonstrates 112 Gbit/sec single-channel data transmission using Pulse Amplitude Modulation with 4 levels (PAM4) and digital signal processing (DSP). This enables high-speed, cost-effective data center interconnects up to 8 Tbit/sec.
Area of Science:
- Optical communications engineering
- Digital signal processing applications
- High-speed data transmission
Background:
- Increasing demand for higher data rates in data centers.
- Limitations of current optoelectronics for advanced modulation formats.
- Need for cost-effective solutions for data center interconnects.
Purpose of the Study:
- To demonstrate high-speed single-channel data transmission using PAM4 and DSP.
- To enable the use of mature 25G optoelectronics for advanced applications.
- To achieve high aggregate bandwidth for data center intra- and inter-connections.
Main Methods:
- Experimental demonstration of 112 Gbit/sec single-channel transmission.
- Utilizing Pulse Amplitude Modulation with 4 levels (PAM4) at 56 Gbaud.
- Employing digital signal processing (DSP) over 15 GHz effective analog bandwidth.
Main Results:
- Successful experimental demonstration of 112 Gbit/sec PAM4 transmission.
- Enabling the use of 25G optoelectronics for 2-10 km datacenter intra-connections.
- Achieving 8 Tbit/sec aggregate bandwidth for 80 km interconnections.
Conclusions:
- DSP-based PAM4 transmission is a viable solution for high-speed data center networks.
- Mature 25G optoelectronics can be leveraged for next-generation data center interconnects.
- The demonstrated technology supports both short-reach and long-reach data center connectivity.
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