Analog domain carrier phase synchronization in coherent homodyne data center interconnects
Analog domain signal processing is an attractive approach for the reduction of power
consumption in high capacity short reach coherent links. An analog domain equalizer for …
consumption in high capacity short reach coherent links. An analog domain equalizer for …
Demonstration of a low-power, local-oscillator-less, and DSP-free coherent receiver for data center interconnects
Performance limitations of currently employed four-level pulse amplitude modulation links
and high power consumption of digital signal processing (DSP)-based coherent links for …
and high power consumption of digital signal processing (DSP)-based coherent links for …
All-analog adaptive equalizer for coherent data center interconnects
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 …
receiver front-end are digitized using very high-speed ADCs and then processed in the …
High-capacity coherent DCIs using pol-muxed carrier and LO-less receiver
Commonly used 4-level pulse amplitude modulation (PAM-4) scheme limits the amount of
data traffic that can be handled by the PAM-4 based data center interconnects (DCIs) …
data traffic that can be handled by the PAM-4 based data center interconnects (DCIs) …
Carrier phase recovery and compensation in analog signal processing based coherent receivers
Analog coherent receiver (ACR) is an attractive alternative to ADC+ DSP based coherent
receiver for reducing the complexity and power consumption in near-future high-capacity …
receiver for reducing the complexity and power consumption in near-future high-capacity …
Real-time demonstration of homodyne coherent bidirectional transmission for next-generation data center interconnects
We experimentally propose and demonstrate homodyne coherent detection in a short-
distance data center interconnect with bidirectional fiber transmission. The transmitter in the …
distance data center interconnect with bidirectional fiber transmission. The transmitter in the …
Beyond 1 Tb/s intra-data center interconnect technology: IM-DD OR coherent?
We discuss technology options and challenges for scaling intra-datacenter interconnects
beyond 1 Tb/s bandwidths, with focus on two possible approaches: pulse amplitude …
beyond 1 Tb/s bandwidths, with focus on two possible approaches: pulse amplitude …
An endless optical phase delay for harmonic-free phase/frequency shifting in coherent-lite DCIs and microwave photonics
An optical IQ modulator (IQM), when driven by quadrature-phase sinusoidal electrical
signals, adds a phase/frequency offset to the optical input. However, harmonics of the …
signals, adds a phase/frequency offset to the optical input. However, harmonics of the …
First demonstration of an O-band coherent link for intra-data center applications
We report the first demonstration of a full O-band coherent link for intra-data center
applications, including custom photonic and electronic integrated circuits for the transmitter …
applications, including custom photonic and electronic integrated circuits for the transmitter …
Analog coherent detection for energy efficient intra-data center links at 200 Gbps per wavelength
T Hirokawa, S Pinna, N Hosseinzadeh… - Journal of Lightwave …, 2020 - ieeexplore.ieee.org
As datacenters continue to scale in size, energy efficiency for short reach (<; 2 km) links is a
major factor for networks that may connect hundreds of thousands of servers. We …
major factor for networks that may connect hundreds of thousands of servers. We …