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View article: An All-Silicon 4x56 Gbit/s NRZ, 1 pJ/bit Optical Receiver with Ge-on-Si PDs and 28nm CMOS TIA Array
An All-Silicon 4x56 Gbit/s NRZ, 1 pJ/bit Optical Receiver with Ge-on-Si PDs and 28nm CMOS TIA Array Open
We demonstrate a low-power (1 pJ/bit), C-band 4x56 Gbit/s NRZ optical receiver constructed from a 28nm CMOS transimpedance amplifier and a Silicon PIC containing a Ge photodetector array. The receiver showcases low-complexity, and low-late…
View article: 60 Gbaud NRZ Transmission with 0.94 PJ/b Direct-Drive Optical Transmitter Using SM 1060 NM VCSEL Over 5 KM SMF
60 Gbaud NRZ Transmission with 0.94 PJ/b Direct-Drive Optical Transmitter Using SM 1060 NM VCSEL Over 5 KM SMF Open
We present a direct-drive optical transmitter demonstrating 60 GBd NRZ transmission with single-mode (SM) 1060 nm VCSEL over 5 km single-mode fiber (SMF), achieving a bit-error-rate (BER) < 1 e-12 after forward-error-correction (FEC) with …
View article: A Co-Designed DC-Coupled 30-Gbps Burst-Mode Receiver and CDR with 3.2-ns Locking Time for Fast Optical Switching
A Co-Designed DC-Coupled 30-Gbps Burst-Mode Receiver and CDR with 3.2-ns Locking Time for Fast Optical Switching Open
The O-band receiver locks in 3.2 ns (strong) and 4.6 ns (weak) with 3-dB inter-burst power variation and 25 ns guard intervals at −6.75/−9.75 dBm. In 4440 bursts, 97.8% show locking time under 5 ns, and 99.4% have BER <2 E-3 over 170 ns pa…
View article: Wideband D-Band Antenna Array Co-Designed With Wirebonded Power Amplifier on a PCB Carrier
Wideband D-Band Antenna Array Co-Designed With Wirebonded Power Amplifier on a PCB Carrier Open
The co-design, fabrication, and characterization of an active D-band antenna array with large bandwidth for use in next-generation, high-speed wireless systems are presented. A silicon–germanium BiCMOS D-band power amplifier (PA) is compac…
View article: Single-chip silicon photonic engine for analog optical and microwave signals processing
Single-chip silicon photonic engine for analog optical and microwave signals processing Open
We present a photonic engine that processes both optical and microwave signals, and can convert signals between the two domains. Our photonic chip, fabricated in IMEC's iSiPP50G silicon photonics process, is capable of both generation and …
View article: dCoNNear: An Artifact-Free Neural Network Architecture for Closed-loop Audio Signal Processing
dCoNNear: An Artifact-Free Neural Network Architecture for Closed-loop Audio Signal Processing Open
Recent advances in deep neural networks (DNNs) have significantly improved various audio processing applications, including speech enhancement, synthesis, and hearing-aid algorithms. DNN-based closed-loop systems have gained popularity in …
View article: Single-Chip Silicon Photonic Engine for Analog Optical and Microwave Signals Processing
Single-Chip Silicon Photonic Engine for Analog Optical and Microwave Signals Processing Open
We present a photonic engine that processes both optical and microwave signals, and can convert signals between the two domains. Our photonic chip, fabricated in IMEC's iSiPP50G silicon photonics process, is capable of both generation and …
View article: A Bi-Directional Distributed Multi-User MIMO Testbed Using Digital Sigma-Delta-Over-Fiber
A Bi-Directional Distributed Multi-User MIMO Testbed Using Digital Sigma-Delta-Over-Fiber Open
Sigma-Delta modulated signals over fiber is proposed for fronthauling of distributed signals. Analog Radioover- Fiber (ARoF) provides perfect synchronization, but linearity is directly impacted by the required circuit elements. Digital Rad…
View article: Experimental Demonstration of a 25 GHz Optoelectronic Oscillator Using an Integrated Resonant Photoreceiver Consisting of a GeSi Photodiode and Co-Designed III-V Low-Noise Amplifier
Experimental Demonstration of a 25 GHz Optoelectronic Oscillator Using an Integrated Resonant Photoreceiver Consisting of a GeSi Photodiode and Co-Designed III-V Low-Noise Amplifier Open
We present an experimental demonstration of a 25 GHz optoelectronic oscillator made using an integrated resonant photoreceiver front-end. The front-end consists of an assembly with a photodiode and a co-designed low-noise amplifier that ha…
View article: A Multi-GHz Inverter-Based ASDM With Distortion Cancellation
A Multi-GHz Inverter-Based ASDM With Distortion Cancellation Open
This brief proposes and demonstrates an asynchronous sigma-delta modulator (ASDM) which is based entirely on pseudo-digital inverters. To achieve multi-GHz operation, the proposed ASDM employs a delay-based approach, with a quantizer consi…
View article: Single-Chip Silicon Photonic Processor for AnalogOptical and Microwave Signals
Single-Chip Silicon Photonic Processor for AnalogOptical and Microwave Signals Open
We present a single photonic chip that processes both optical and microwave signals, and can convert signals between the two domains. Our chip, fabricated in IMEC’s iSiPP50G silicon photonics process, is capable of both generation and dete…
View article: A compact SiGe D-band power amplifier for scalable photonic-enabled phased antenna arrays
A compact SiGe D-band power amplifier for scalable photonic-enabled phased antenna arrays Open
To address the rising demand for high-speed wireless data links, communication systems operating at frequencies beyond $${100}\,\hbox {GHz}$$ are being targeted. A key enabling technology in the development of these wireless systems is…
View article: Single-Chip Silicon Photonic Processor for Analog Optical and Microwave Signals
Single-Chip Silicon Photonic Processor for Analog Optical and Microwave Signals Open
The explosion of data volume in communications, AI training, and cloud computing requires efficient data handling, which is typically stored as digital electrical information and transmitted as wireless radio frequency (RF) signals or ligh…
View article: High speed transceivers beyond 1.6Tb/s for data centre networks
High speed transceivers beyond 1.6Tb/s for data centre networks Open
The demand for compute capacity is currently doubling every 3.4months. This has accelerated the need for Terabit optical transceivers for data centre applications. Scaling options, and photonic and electronic technologies that can meet suc…
View article: First real-time demonstration of a flexible multi-λ DRoF/ARoF/SDoF transport for fiber/mmWave RAN
First real-time demonstration of a flexible multi-λ DRoF/ARoF/SDoF transport for fiber/mmWave RAN Open
A reconfigurable, technology-agnostic X-haul optical infrastructure with active wavelength routing for converged A-RoF/D-Band, D-RoF/E-Band and SDoF streams was demonstrated. The deployed SDN-enabled AWGR-based transport topology supported…
View article: High-Speed SiGe BiCMOS Circuits for Optical Communication
High-Speed SiGe BiCMOS Circuits for Optical Communication Open
This paper presents an overview of SiGe BiCMOS circuits for next-generation optical communication links targeting 100 GBd PAM4 modulation per wavelength to support 4-lane 800Gb and 8-lane 1.6Tb Ethernet. Signal generation at these rates is…
View article: Heterogeneous integration of a high-speed lithium niobate modulator on silicon nitride using micro-transfer printing
Heterogeneous integration of a high-speed lithium niobate modulator on silicon nitride using micro-transfer printing Open
Integrated photonic systems require fast modulators to keep up with demanding operation speeds and increasing data rates. The silicon nitride integrated photonic platform is of particular interest for applications such as datacom, light de…
View article: Wireless and Wearable Auditory EEG Acquisition Hardware Using Around-The-Ear cEEGrid Electrodes
Wireless and Wearable Auditory EEG Acquisition Hardware Using Around-The-Ear cEEGrid Electrodes Open
Aside from a clinical interest in electroencephalography (EEG) measurements of real-time data with a high temporal resolution, there is a demand for acquisition systems that are operable outside the laboratory environment. In this study, w…
View article: System-Level Simulation Suite for the Design of mmWave-Over-Fiber-Based Distributed Antenna Systems
System-Level Simulation Suite for the Design of mmWave-Over-Fiber-Based Distributed Antenna Systems Open
Although challenging propagation conditions reduce its reliability, the mmWave spectrum is considered a cornerstone of (beyond-)5G networks. Recently, distributed antenna systems (DASs) surrounding the mobile users with multiple remote ant…
View article: 60 GHz Analog Radio-Over-Fiber Single Sideband Transmitter Chipset With 55nm SiGe BiCMOS Driver RFIC and Silicon Photonics Modulator PIC
60 GHz Analog Radio-Over-Fiber Single Sideband Transmitter Chipset With 55nm SiGe BiCMOS Driver RFIC and Silicon Photonics Modulator PIC Open
An all-silicon analog radio-over-fiber transmitter chipset is presented for narrowband operation in the unlicensed 60 GHz V-band for use in low-cost and low-power distributed antenna systems. The chipset consists of a low-noise high-speed …
View article: Co-Design Strategies for AFSIW-Based Remote Antenna Units for RFoF
Co-Design Strategies for AFSIW-Based Remote Antenna Units for RFoF Open
This contribution discusses several recently proposed remote antenna units (RAUs) based on air-filled substrate-integrated-waveguide technology, specifically focusing on the co-design between antenna elements and optoelectronic transducers…
View article: Photonic Network-on-Wafer for Multichiplet GPUs
Photonic Network-on-Wafer for Multichiplet GPUs Open
This article introduces the photonic network-on-wafer graphics processing unit (GPU) architecture to overcome fundamental limitations in electrical interconnect scaling by implementing the inter-GPU network in a wafer-scale optical interpo…
View article: High-Speed Lithium Niobate Modulator on Silicon Nitride using Micro-Transfer Printing
High-Speed Lithium Niobate Modulator on Silicon Nitride using Micro-Transfer Printing Open
A high-speed modulator on silicon nitride is demonstrated using 2 mm-long micro-transfer printed lithium niobate coupons. This device has a 3-dB bandwidth >50GHz, and an insertion loss of 3.3 dB that allowed us to transmit 70 Gb/s.
View article: Electronic and photonic IC co-design for high-speed optical transceivers
Electronic and photonic IC co-design for high-speed optical transceivers Open
New circuit architectures and technologies for high-speed electronic and photonic integrated circuits are essential to realize optical interconnects with higher symbol rate. As a consequence of the increasing speeds, close integration and …
View article: System-Level Model for mmWave-over-Fiber Distributed Antenna Systems
System-Level Model for mmWave-over-Fiber Distributed Antenna Systems Open
A mmWave-over-fiber distributed antenna system (DAS), in combination with highly efficient air-filled substrate-integrated-waveguide (AFSIW) remote antenna units (RAUs), proves to be a prime candidate to counter the harsh propagation condi…
View article: Co-designed electro-optical integrated frontend circuits for high speed transceivers
Co-designed electro-optical integrated frontend circuits for high speed transceivers Open
Co-design of photonic and electronic chips has become a necessity to realize high-performance transceivers. This paper will illustrate a number of recent developments of high-speed transceiver circuits including broadband driver amplifier…
View article: Air-Filled SIW Remote Antenna Unit With True Time Delay Optical Beamforming for mmWave-Over-Fiber Systems
Air-Filled SIW Remote Antenna Unit With True Time Delay Optical Beamforming for mmWave-Over-Fiber Systems Open
A low-complexity and efficient mmWave-over-fiber remote antenna unit (RAU) is proposed for broadband transmission and wide-angle squint-free beam steering in the full [26.5-29.51 GHz n257 5G band. It leverages an optical beamforming networ…
View article: mmWave-over-Fiber Distributed Antenna Systems for Reliable multi-Gbps Wireless Communication
mmWave-over-Fiber Distributed Antenna Systems for Reliable multi-Gbps Wireless Communication Open
Recent technological advancements in the field of antenna design and microwave photonics have paved the way for broadband and efficient mmWave-over-fiber distributed an-tenna systems. In this work, we discuss the practical realization and …
View article: Transceiver circuits for high-baudrate optical interconnects
Transceiver circuits for high-baudrate optical interconnects Open
New circuit architectures and technologies for high-speed electronic and photonic integrated circuits are essential to realize optical interconnects with higher symbol rate. As a consequence of the increasing speeds, close integration and …