UNICO’s Post

Recent advancements in silicon photonics for high-speed communications are reviewed in a Nature article. Silicon photonic integrated circuits (SiPh) offer scalable, low-cost production for optical transceivers, essential for managing growing data traffic. Innovations in waveguide grating couplers and high-speed silicon modulators enable multichannel communications beyond 1.6Tb/s. These developments are crucial for the future of data centers and optical communication systems. Via Nature https://lnkd.in/gTJaughV Citation: Figure 1 from Zhou, X., Yi, D., Chan, D.W.U. et al. Silicon photonics for high-speed communications and photonic signal processing. npj Nanophoton. 1, 27 (2024). https://lnkd.in/gzB5tDbn #SiliconPhotonics #DataCenters #HighSpeedCommunications

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

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

🌐 Graphene Photodetectors: A New Era of High-Speed Innovation 🚀 This innovative study highlights a major development in photodetector technology using monolayer graphene. Researchers from the Institute of Electromagnetic Fields (IEF) at ETH Zurich revealed a groundbreaking device with a self-powered 3 dB bandwidth of 420 GHz, making it one of the fastest photodetectors in the world. Key highlights: Photothermoelectric-induced currents for ultra-fast performance Metamaterial design enhances light absorption and allows dual-wavelength detection CMOS-compatible with integrated demultiplexing These research advancements are shaping the future of high-speed photodetectors and cutting-edge optoelectronics. Click below to read more: https://lnkd.in/e8xYJMdG #GrapheneTech #Photodetectors #CVDGraphene #Optoelectronics

🔬 Researchers have developed a solution for superconducting quantum processors, addressing the challenge of delivering microwave signals from room-temperature electronics to the cryogenic environment through coaxial cables. This setup is not viable for the millions of qubits required for fault-tolerant quantum computing due to the heat load of cabling and the cost of electronics. 🛠️ The solution: Monolithic integration of control electronics and qubits, which requires a coherent cryogenic microwave pulse generator compatible with superconducting quantum circuits. 🔎 Key advancements: 💡 A signal source driven by digital-like signals. 📡 Pulsed microwave emission with well-controlled phase, intensity, and frequency directly at millikelvin temperatures. 🎯 High-fidelity readout of superconducting qubits with the microwave pulse generator. 🧩 This device has a small footprint, negligible heat load, and great flexibility in operation. It is fully compatible with today’s superconducting quantum circuits, providing an enabling technology for large-scale superconducting quantum computers! 🖥️💫 #QuantumComputing #SuperconductingQubits #Innovation #Technology #Research #FutureOfComputing

Free-space optical communications in the mid-infrared transparency windows (4–5 and 8–14 μm) are becoming a promising solution for high-speed data transmission. Unipolar quantum optoelectronics is preferred for this purpose due to the high frequency response of its detectors and modulators. Our recent study done in collaboration with École normale supérieure and ETH Zürich shows that embedding these devices into metamaterials significantly improves their performance. The enhanced devices enable data transmission at a record speed of 68 Gbps, offering robustness and reliability for practical use. The results highlight the potential of metamaterial-enhanced unipolar devices for advancing free-space optical communications. Check out: https://lnkd.in/gk8sqNf7

Researchers at the University of Science and Technology of China (USTC)'s iGAN Laboratory, led by Prof. Haiding Sun and other institutes in China, have recently developed a new three-terminal diode. This diode, which can both emit and detect light, was presented in a paper published in Nature Electronics. The development of this diode could open up new possibilities for highly performing wireless communication and light-driven computing systems. Inspired by the limitations of traditional two-terminal devices, such as the p–n diode, the researchers sought to enhance the functionality and performance of conventional optoelectronic devices. #semiconductor #photonics #optoelectronics #LED #diode #breakthrough https://lnkd.in/e-M9S8Ng

Our latter work relates to quantum computing readout design, a 10-coupled-transmon-qubit quantum chip is integrated with an advanced readout circuit to enable efficient and accurate qubit state detection. This setup incorporates a novel Josephson Parametric Amplifier (JPA) design, featuring Blochnium-based elements to enhance parametric gain and stability for improved signal amplification at cryogenic temperatures. The readout system is further supported by a System-on-Chip (SoC) analog circuit, fabricated using 45 nm CMOS technology, which streamlines the signal processing from cryogenic (10 mK) up to ambient temperatures (300 K). The multi-layered design includes low-pass and band-pass filtering stages, low-noise amplification, and high-speed analog-to-digital conversion, ensuring precise readout of qubit states with minimal signal degradation. This integration of superconducting and CMOS technology marks a step forward in scalable quantum information processing and readout fidelity, providing a compact, high-performance solution for advanced quantum computing systems. #quantumCircuit, #CMOS, #QuantumComputing,

In-depth analysis of the working principle of optical switches: exploring the key to flexibility in the field of optical communications Optical switches, as an indispensable component in optical communication networks, are like the "optical traffic police" of the digital world, playing a vital role in the transmission path of optical signals. They can not only achieve fast switching and protection of optical signals, but also improve data transmission rate and quality, which are the key to building high-speed and reliable optical networks. As a manufacturer specializing in the production and manufacturing of optical switches, we are well aware of the importance of the working principle of optical switches and its technological breakthroughs to the entire optical communications industry. Basic types and working principles of optical switches There are many types of optical switches. According to their working principles and structures, they can be mainly divided into the following categories: 1. Mechanical optical switch: The optical path is disconnected or closed through the movement of optical fibers or optical components. This type of optical switch usually includes relay type and motor type. Relay-type optical switches use aspherical lenses, prisms and reflectors to form the optical part, and use communication-grade micro-relays to drive the lenses to achieve optical path switching. The motor-type optical switch uses a stepper motor to drive the optical fiber to perform micro-step rotation to achieve coupling and switching of optical paths. 2. MEMS optical switch: Based on micro-electromechanical system technology, tiny lenses are carved on the silicon crystal, and the lenses are rotated through electrostatic force or electromagnetic force, thereby changing the propagation direction of the input light and realizing the on-off of the optical path. MEMS optical switches are efficient and flexible and show great application potential in optical signal routing, network monitoring and protection. 3. Magneto-optical switch: Utilizes the Faraday optical rotation effect to rotate the polarization plane of the incident light by changing the external magnetic field, thereby achieving the purpose of switching the optical path. Magneto-optical switches have the characteristics of microsecond-level high-speed switching speed, small size, strong stability, and high reliability. They are the preferred components in high-speed optical communication systems. Read more https://lnkd.in/g_FEgeCq #xhphotoelectric #opticalswitch #Data #fiber #optics #photonics #NetworkSwitch

World’s 1st 60 GHz Antenna to pave the way for ultrafast 6G communication? Researchers at the University of Glasgow in the UK have developed the world’s first 60 Giga Hertz (GHz) millimeter-wave (mmWave) band antenna to facilitate ultrafast communication using 6G networks. The 60 GHz mmFWave is part of the spectrum reserved by international law for use in industrial, scientific, and medical (ISM) applications, as per the university. With the fifth generation of telecommunication technology being rolled out in various parts of the world, the race is on to develop the next generation of communication tech. 6G has the potential to deliver transformative benefits across society. Our high-frequency intelligent and highly adaptive antenna design could be one of the technological foundation stones of the next generation of mmWave reconfigurable antennas #Antenna #Technology