Robert Grootjans
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View article: Integrated microwave photonic functionalities on a hybrid integrated InP-Si<sub>3</sub>N<sub>4</sub> PIC platform
Integrated microwave photonic functionalities on a hybrid integrated InP-Si<sub>3</sub>N<sub>4</sub> PIC platform Open
<p>This paper describes our hybrid integrated microwave photonic chip platform where ultra-low-loss Si3N4-based-TriPleX <sup>®</sup> and active InP integrated circuits are combined to enable broadband and high frequen…
View article: Injection Locking Properties of an Dual Laser Source for mm-Wave Communications
Injection Locking Properties of an Dual Laser Source for mm-Wave Communications Open
We for the first time, the optical injection locking (OIL) to a frequency comb of a hybrid dual laser source for high-purity mm-wave generation through optical heterodyning. Key performance parameters of the comb line demultiplexing funct…
View article: InP-Si3N4 Hybrid Integrated Optical Source for High-purity Mm-wave Communications
InP-Si3N4 Hybrid Integrated Optical Source for High-purity Mm-wave Communications Open
We present the optical injection locking to a comb of a hybrid InP-Si 3 N 4 dual laser source for high-purity mm-wave generation. Key performance parameters such as adjacent-comb-line side mode suppression ratio and locking range are repor…
View article: Silicon photonics open access foundry services review for emerging technology
Silicon photonics open access foundry services review for emerging technology Open
This paper presents a summary review of some of the available foundry services offering Silicon Photonics, comparing the key technologies available to European technology innovators that drive the technology sector. The foundries providing…
View article: True Time Delay Optical Beamforming Network Based on Hybrid Inp-Silicon Nitride Integration
True Time Delay Optical Beamforming Network Based on Hybrid Inp-Silicon Nitride Integration Open
We demonstrate a broadband and continuously tunable 14 optical beamforming network (OBFN), based on the hybrid integration of indium phosphide (InP) components in the silicon nitride (Si3N4) platform. The photonic integrated circuit (PIC) …
View article: Photonic Integrated Circuits for Terahertz Communication: The Hybrid Integrated Microwave Photonic approach
Photonic Integrated Circuits for Terahertz Communication: The Hybrid Integrated Microwave Photonic approach Open
Optical heterodyne signal generation is the most flexible photonic microwave generation technique. Photonic integrated solutions have been shown monolithically on InP, and more recently on silicon. We present novel implementations using hy…
View article: Widely Tunable RF Signal Generation Using an InP/Si<sub>3</sub>N<sub>4</sub> Hybrid Integrated Dual-Wavelength Optical Heterodyne Source
Widely Tunable RF Signal Generation Using an InP/Si<sub>3</sub>N<sub>4</sub> Hybrid Integrated Dual-Wavelength Optical Heterodyne Source Open
Photonics-based techniques spearhead the generation of high-frequency signals in the millimeter-and Terahertz wave, crucial for ultrabroadband mobile wireless link development. Photonic integration is enabling to provide the photonic appro…
View article: True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration
True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration Open
We demonstrate a broadband and continuously tunable 1×4 optical beamforming network (OBFN), based on the hybrid integration of indium phosphide (InP) components in the silicon nitride (Si3N4) platform. The photonic integrated circuit (PIC)…
View article: True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration
True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration Open
We demonstrate a broadband and continuously tunable 1×4 optical beamforming network (OBFN), based on the hybrid integration of indium phosphide (InP) components in the silicon nitride (Si3N4) platform. The photonic integrated circuit (PIC)…
View article: High power integrated laser for microwave photonics
High power integrated laser for microwave photonics Open
We present a hybrid integrated laser with two gain sections coupled to one tunable cavity. The resulting laser has a record on-chip power of up to 20.7 dBm and an intrinsic linewidth of 320 Hz.
View article: Hybrid Integrated Semiconductor Lasers with Silicon Nitride Feedback Circuits
Hybrid Integrated Semiconductor Lasers with Silicon Nitride Feedback Circuits Open
Hybrid integrated semiconductor laser sources offering extremely narrow spectral linewidth, as well as compatibility for embedding into integrated photonic circuits, are of high importance for a wide range of applications. We present an ov…
View article: Liquid crystal phase modulator integration on the TriPleX photonic platform
Liquid crystal phase modulator integration on the TriPleX photonic platform Open
Technology integration of liquid crystal cells for electro-optic modulation has been implemented on the commercial TriPleX photonic platform. Design and fabrication procedure have been optimized for fulfilling the low insertion loss criter…
View article: Development of a Broadband Integrated Microwave Photonic Beamformer for 5G applications
Development of a Broadband Integrated Microwave Photonic Beamformer for 5G applications Open
Microwave photonics (MWP) is an emerging field in which radio frequency (RF) signals are generated, distributed, processed, and analyzed using the advantages of photonic techniques such as large RF frequency bandwidth capability and absenc…
View article: 8x8 Programmable Quantum Photonic Processor based on Silicon Nitride Waveguides
8x8 Programmable Quantum Photonic Processor based on Silicon Nitride Waveguides Open
The development of large-scale optical quantum information processing circuits ground on the stability and reconfigurability enabled by integrated photonics. We demonstrate a reconfigurable 8x8 integrated linear optical network based on si…
View article: Low-Loss Si3N4 TriPleX Optical Waveguides: Technology and Applications Overview
Low-Loss Si3N4 TriPleX Optical Waveguides: Technology and Applications Overview Open
An overview of the most recent developments and improvements to the low-loss TriPleX Si3N4 waveguide technology is presented in this paper. The TriPleX platform provides a suite of waveguide geometries (box, double stripe, symmetric single…
View article: Integrated microwave photonics for 5G
Integrated microwave photonics for 5G Open
This paper describes the design, fabrication, packaging, testing and\nautomated tuning of an integrated 1x4 optical beamforming network. It\nconsists of hybridly integrated InP and TriPleX chips, where end-facet coupling\nis used for optic…
View article: The Engineering Development Array: A Low Frequency Radio Telescope Utilising SKA Precursor Technology
The Engineering Development Array: A Low Frequency Radio Telescope Utilising SKA Precursor Technology Open
We describe the design and performance of the Engineering Development Array, which is a low-frequency radio telescope comprising 256 dual-polarisation dipole antennas working as a phased array. The Engineering Development Array was conceiv…