General Graphene Corporation’s Post

New Paper Published in IEEE Photonics Technology Letters We are excited to announce the publication of our latest article, “2×53 Gbit/s PAM-4 Transmission Using 1.3 μm DML with High Power Budget Enabled by Quantum-Dot SOA” in IEEE Photonics Technology Letters, Volume: 37, page 1 (DOI: 10.1109/LPT.2024.3504841 https://lnkd.in/gf_N_J8s). This research is a collaborative effort between Dublin City University, Eblana Photonics Ltd., and Innolume GmbH.         The study explores the efficiency of directly modulated lasers (DMLs) operating at a 1.3 μm wavelength in conjunction with quantum-dot semiconductor optical amplifiers (SOAs) for next-generation passive optical networks. It successfully demonstrates 2×53 Gbit/s transmission using PAM-4 modulation over 20 km of single-mode fiber. The research compares the performance of quantum-well-based and quantum-dot-based SOAs under wavelength-division multiplexing (WDM) conditions. Notably, the quantum-dot SOAs, when paired with a 30-tap T-spaced equalizer, achieve an impressive total power budget of 34 dB per WDM channel. These results underscore the significant potential of this approach for enabling high-speed, efficient optical networks in the future. We invite you to explore this groundbreaking work in the published article https://lnkd.in/gf_N_J8s. #QuantumDotSOA #OpticalNetworks #PhotonicsResearch #IEEEPhotonics

𝗜𝗜𝗜-𝗩-𝗼𝗻-𝗦𝗶 𝗠𝗲𝗺𝗯𝗿𝗮𝗻𝗲 𝗗𝗶𝘀𝘁𝗿𝗶𝗯𝘂𝘁𝗲𝗱 𝗥𝗲𝗳𝗹𝗲𝗰𝘁𝗼𝗿 𝗟𝗮𝘀𝗲𝗿𝘀 𝘄𝗶𝘁𝗵 𝗜𝗻𝘁𝗲𝗿𝗺𝗶𝘅𝗲𝗱 𝗠𝗤𝗪 𝗗𝗕𝗥𝘀 On-chip light sources are crucial for the future of silicon photonics, yet current integration methods lead to higher power consumption and inefficiency. NTT's membrane lasers offer a breakthrough solution, significantly improving performance while reducing chip size and energy demands. 𝗧𝗮𝗸𝗲𝗮𝘄𝗮𝘆 ‣ The proposed DR lasers achieve a minimum threshold current of 0.88 mA, about half of the conventional detuned DFB lasers. ‣ The new design ensures smooth lasing spectra with side-mode suppression ratios ranging from 51 dB to 43 dB. ‣ The intermixed quantum well DBR structure enables precise wavelength and phase control, improving overall lasing efficiency. 𝗥𝗲𝗮𝗱 𝘁𝗵𝗲 𝗳𝘂𝗹𝗹 𝗮𝗿𝘁𝗶𝗰𝗹𝗲: https://lnkd.in/gmGW-76z #SiliconPhotonics #MembraneLasers #QuantumWells #OnChipLightSources #III_VPhotonics

Very interesting paper about #graphene. (Source : Nature / Published: 01 May 2024 / Open access) Abstract: Graphene photodetectors have exhibited high bandwidth and capability of being integrated with silicon photonics (SiPh), holding promise for future optical communication devices. However, they usually suffer from a low photoresponsivity due to weak optical absorption. In this work, we have implemented SiPh-integrated twisted bilayer graphene (tBLG) detectors and reported a responsivity of 0.65 A W–1 for telecom wavelength 1,550 nm. The high responsivity enables a 3-dB bandwidth of >65 GHz and a high data stream rate of 50 Gbit s–1. Such high responsivity is attributed to the enhanced optical absorption, which is facilitated by van Hove singularities in the band structure of high-mobility tBLG with 4.1o twist angle. The uniform performance of the fabricated photodetector arrays demonstrates a fascinating prospect of large-area tBLG as a material candidate for heterogeneous integration with SiPh. #graphene #graphenephotodetectors #bandwidth #opticalcommunications #opticalabsorption #enhancedopticalabsorption #twistedbilayergraphene https://lnkd.in/gdXU6Jm5

Lithium Niobate Photonic Integrated Circuit Based High Speed, Low Voltage Modulators For Microwave Photonics ⚡🌟🌍 📢 Register for the Final Presentation! 📢 Learn more about how Luxtelligence SA is transforming the field of microwave photonics through groundbreaking advancements in Thin-Film Lithium Niobate (#TFLN) technology. This innovative project is paving the way for faster, more efficient, and compact electro-optic modulators, with wide-ranging applications in data communication, #PNT, quantum technologies, and beyond. 🗓 Date: 26/11/2024 ⏰ Time: 10:00-11:30 CET This project aimed at providing a verified component library for applications ranging from data communication to PNT and quantum technologies. The focus of this project is the demonstration of a process design kit (PDK) including key building blocks for realizing low optical loss and high electronic bandwidths. The key advantage of this technology compared to the conventional/current electro-optic modulators is the high modulation bandwidth (2x faster) and lower power consumption (40% lower). In addition, the developed TFLN technology benefits from a substantial 10x reduction in device size compared to bulk modulators. This developed PDK lowers the barrier to entry for new technologies to go from idea to a prototype in a short timeframe, with an eye on production and cost reduction via volume manufacturing, as a strong suite of integrated photonics platforms. Curious?  More information are available here: https://lnkd.in/eF8tmJ-c Secure your spot and register here: https://lnkd.in/eR639jXP #PNT #positioning #navigation #timing #ESA #NAVISP #Innovation #GNSS #Photonics #TFLN #Innovation #MicrowavePhotonics #ElectroOpticModulators #HighSpeedModulation #EnergyEfficiency #CompactDesigns #IntegratedPhotonics #OpticalCommunication #QuantumTechnologies #PNT

𝗠𝗘𝗠𝗦-𝗘𝗻𝗮𝗯𝗹𝗲𝗱 𝗠𝗼𝘃𝗮𝗯𝗹𝗲 𝗖𝗹𝗮𝗱𝗱𝗶𝗻𝗴 𝗣𝗵𝗮𝘀𝗲 𝗦𝗵𝗶𝗳𝘁𝗲𝗿 𝗳𝗼𝗿 𝗦𝗶𝗹𝗶𝗰𝗼𝗻 𝗡𝗶𝘁𝗿𝗶𝗱𝗲 𝗣𝗵𝗼𝘁𝗼𝗻𝗶𝗰𝘀 A new movable cladding design delivers low-loss, low-power phase shifting for next-gen optical circuits. 𝗪𝗵𝗮𝘁'𝘀 𝗻𝗲𝘅𝘁 ‣ Integration into advanced optical processors for quantum computing and neural networks. ‣ Further refinement of the cladding actuation mechanism could lower voltage requirements and enhance durability. ‣ Expanding to multi-phase shifting architectures for larger PICs. 𝗧𝗵𝗲 𝗯𝗼𝘁𝘁𝗼𝗺 𝗹𝗶𝗻𝗲 This MEMS-enabled movable cladding phase shifter is a leap forward in precision, efficiency, and scalability for silicon nitride photonics. Its low loss, compact footprint, and low-power operation make it a critical building block for future photonic technologies. 𝗞𝗲𝗲𝗽 𝗿𝗲𝗮𝗱𝗶𝗻𝗴: https://lnkd.in/gUsM5fii #SiliconNitride #PhotonicsInnovation #MEMSPhaseShifter #IntegratedPhotonics #QuantumTechnology Citation: M. Namdari, M. Blasl, T. Grasshoff, M. Wagner, and J. Grahmann, "Phase Shifter for Silicon Nitride Photonics using MEMS-Enabled Movable Cladding," Fraunhofer Institute for Photonic Microsystems IPMS, Maria-Reiche-Str. 2, 01109 Dresden, Germany, 2024, pp. 1-6, doi: 979-8-3503-9404-7/24/$31.00 ©2024 IEEE.

Paper accepted in IEEE PHOTONICS TECHNOLOGY LETTERS DOI:10.1109/LPT.2024.3504841https://lnkd.in/emep8SRV The UNICO team is happy to announce the publication of the paper “2×53 Gbit/s PAM-4 Transmission Using 1.3 μm DML with High Power Budget Enabled by Quantum-Dot SOA” in IEEE Photonics Technology Letters. The massive growth in the digital economy continues to require the development of new technologies to increase data rates, while reducing the energy consumption of the optical communication systems that form the backbone of the internet. This collaborative work between industry and academic partners in Ireland and Germany demonstrates that by combining a high speed directly modulated laser which has excellent efficiency, with an efficient quantum dot semiconductor optical amplifier, we can develop high capacity and energy efficient data transmission systems. Specifically the use of a directly modulated laser instead of external modulation greatly reduces the system loss, and the ability to amplify a multiwavelength signal with a single SOA minimises energy consumption per bit while ensuring the ability to operate the transmission link over significant distances. #biterrorrate, #BER, #SOA, #fiber, #datatransmission, #PAM4, #NRZ, #Opticalfibers, #Opticalsaturation, #Opticalfibercommunication, #Opticalfiberamplifiers, #Gain, #Opticaltransmitters, #Opticalfibersensors, #Opticaldistortion, #Adaptiveoptics

𝗛𝗲𝘁𝗲𝗿𝗼𝗴𝗲𝗻𝗲𝗼𝘂𝘀𝗹𝘆 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗲𝗱 𝗣𝗮𝘀𝘀𝗶𝘃𝗲𝗹𝘆 𝗠𝗼𝗱𝗲-𝗟𝗼𝗰𝗸𝗲𝗱 𝗤𝘂𝗮𝗻𝘁𝘂𝗺 𝗗𝗼𝘁 𝗟𝗮𝘀𝗲𝗿 𝗼𝗻 𝗦𝗶𝗹𝗶𝗰𝗼𝗻 QD-based MLLs combined with silicon photonics create scalable, low-noise, multiwavelength light sources essential for WDM systems, pushing the boundaries of bandwidth and energy efficiency for data-intensive applications. 𝗪𝗵𝘆 𝗶𝘁 𝗺𝗮𝘁𝘁𝗲𝗿𝘀 ‣ Quantum dot MLLs provide stable, low-noise multiwavelength output, outperforming traditional laser arrays and enhancing optical signal quality for WDM. ‣ The integration method uses precise etching and tapering techniques, achieving efficient coupling between III-V and silicon components, reducing optical losses. ‣ Future work aims to incorporate quantum dot amplifiers and photodetectors, paving the way for fully integrated photonic links and next-generation computing and communication systems. 𝗥𝗲𝗮𝗱 𝘁𝗵𝗲 𝗳𝘂𝗹𝗹 𝗮𝗿𝘁𝗶𝗰𝗹𝗲: https://lnkd.in/g9GP6-un #SiliconPhotonics #QuantumDotLaser #ModeLockedLaser #IntegratedPhotonics #HighBandwidth

A flat sheet of atoms can act as a kind of antenna that absorbs light and funnels its energy into carbon nanotubes, making them glow brightly. This advance could aid the development of tiny future light-emitting devices that will exploit quantum effects. Carbon nanotubes resemble very thin, hollow wires with a diameter of just a nanometer or so. They can generate light in various ways. For example, a laser pulse can excite negatively charged electrons within the material, leaving positively charged "holes." These opposite charges can pair up to form an energetic state known as an exciton, which may travel relatively far along a nanotube before releasing its energy as light. In principle, this phenomenon could be exploited to make highly efficient nanoscale light-emitting devices. #quantum #carbon #nanotubes #light #antenna https://lnkd.in/g4SivC-x

Highlights from the EPIC Online Technology Meeting on Integrated Photonics Manufacturing   The recent EPIC Online Technology Meeting brought together industry leaders and experts from Europe and Taiwan to present the latest advancements in photonics integration. Opened by Ivan Nikiski, Phonics Technology Expert at EPIC, the event featured insightful talks from top companies, including APAC Opto Electronics, Focusight, Wavesplitter Technologies, ficonTEC, and Aerotech. Topics covered a broad range of innovations, from quantum photonics applications to micro-optics and motion control for datacom solutions.   A notable keynote was delivered by Alexey Kovsh on the transformative potential of Quantum Dot (QD) Lasers for photonic integration. Key takeaways included:               • Optical Isolator Unnecessary: QD lasers naturally resist back reflections, simplifying heterogeneous integration with Silicon Photonics PICs.               • Temperature Stability: Demonstrated high power and efficiency at temperatures above 100°C.               • Extended Reliability with No Early-Life Failures: Preliminary results show that QD lasers avoid early failures, potentially simplifying high-volume manufacturing burn-in procedures.               • Ability to Build Multi-𝛌 Chips: Facilitates high-yield, high-count DFB arrays, comb lasers, and WDM SOAs with ultra-low noise.               • Better Manufacturability and Cost Effectiveness: GaAs wafer processing is more scalable and less fragile compared to InP-based technologies, benefiting from low-cost 6-inch wafers.   The presentation emphasized how GaAs-based QD CW DFB lasers could surpass InP-based counterparts in terms of cost, reliability, and production yield. The upcoming shift toward 1600G (8x200G) capacity underscores the importance of these innovations.   The future of photonics integration is promising, with QD technology paving the way for enhanced performance and reduced operational challenges.  https://lnkd.in/gP5seJiA #Photonics #QuantumDotLasers #TechInnovation #IntegratedPhotonics #EPICMeeting #DataTransmission

𝗦𝘂𝗽𝗲𝗿𝗰𝗼𝗻𝗱𝘂𝗰𝘁𝗶𝗻𝗴 𝗡𝗮𝗻𝗼𝘄𝗶𝗿𝗲 𝗦𝗶𝗻𝗴𝗹𝗲 𝗣𝗵𝗼𝘁𝗼𝗻 𝗗𝗲𝘁𝗲𝗰𝘁𝗼𝗿 𝗠𝗮𝗿𝗸𝗲𝘁 𝟮𝟬𝟮𝟰-𝟮𝟬𝟯𝟬. 𝗚𝗹𝗼𝗯𝗮𝗹 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗥𝗲𝗽𝗼𝗿𝘁 𝗥𝗲𝗾𝘂𝗲𝘀𝘁 𝗳𝗼𝗿 𝗦𝗮𝗺𝗽𝗹𝗲 𝗥𝗲𝗽𝗼𝗿𝘁 𝗼𝗿 𝗥𝗲𝗾𝘂𝗲𝘀𝘁 𝗳𝗼𝗿 𝗥𝗲𝗽𝗼𝗿𝘁 𝗖𝘂𝘀𝘁𝗼𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻: https://lnkd.in/dBXmDNfc Superconducting Nanowire Single Photon Detectors (SNSPD) are advanced devices that leverage superconducting phase transitions to achieve high-performance single photon detection. The technology works by utilizing photon energy to break Cooper pairs in superconducting nanowires, causing a local superconducting-to-non-superconducting phase transition. SNSPDs outperform traditional semiconductor devices, particularly in the near-infrared band, and have been widely validated in fields such as quantum information. This report provides a comprehensive overview of the global SNSPD market, covering capacity, output, revenue, and pricing. It includes analysis of market trends from 2019 to 2024, estimates for 2024, and projections for the compound annual growth rate (CAGR) through 2030. *𝗕𝘆 𝗧𝘆𝗽𝗲: Detection Efficiency ≥70%, Detection Efficiency ≥80%, Other *𝗕𝘆 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Quantum Information, Low Light Detection, Other *𝗕𝘆 𝗥𝗲𝗴𝗶𝗼𝗻: North America, Europe, Asia-Pacific, South America, Middle East & Africa *𝗕𝘆 𝗞𝗲𝘆 𝗣𝗹𝗮𝘆𝗲𝗿𝘀: Single Quantum, ID Quantique, Pixel Photonics, Photon Technology International, Inc. #SNSPD #SuperconductingNanowires #PhotonDetection #QuantumTechnology #SinglePhotonDetection #QuantumInformation #NanowireDetectors #SuperconductingPhaseTransition #CooperPairBreaking #NearInfraredDetection #PhotonSensors #QuantumOptics #HighPerformanceDetectors #SinglePhotonCounting #QuantumCommunication #SuperconductingElectronics #Photonics #LowTemperatureDetectors #PhotonDetectionSystems #QuantumPhotodetectors