5 papers
An Analog Signal Processing EIC-PIC Solution for Coherent Data Center Interconnects
Shivangi Chugh, Rakesh Ashok, Punit Jain +3
Data center interconnects (DCIs) will have to support throughputs of 400 Gbps or more per wavelength in the near future. To achieve such high data rates, coherent modulation and de…
An Endless Optical Phase Delay for Phase Synchronization in High-Capacity DCIs
Rakesh Ashok, Sana Naaz, Shalabh Gupta
In this work, we propose and demonstrate a module to linearly add an arbitrary amount of continuous (reset-free) phase delay to an optical signal. The proposed endless optical phas…
Demonstration of an LO-less, DSP-free QPSK Receiver for Data Center Interconnects
Rashmi Kamran, Nandakumar Nambath, Sarath Manikandan +4
We present the first demonstration of a local oscillator (LO)-less digital signal processing (DSP)-free coherent receiver for high-capacity short distance optical links. Experiment…
All-Analog Adaptive Equalizer for Coherent Data Center Interconnects
Nandakumar Nambath, Rakesh Ashok, Sarath Manikandan +5
In a high-speed coherent optical transmission system, typically the signals obtained at the receiver front-end are digitized using very high-speed ADCs and then processed in the di…
A Polarization Multiplexed Carrier based Coherent Link with Adaptive Polarization Control
Rashmi Kamran, Sana Naaz, Sarath Manikandan +3
Transmitting polarization multiplexed carrier makes the receiver of a coherent system local oscillator-less and frequency offset-free. A polarization multiplexed carrier based self…