30Apr, 2024
    O-Band – The True 100G DWDM Solution

    WDM (Wavelength Division Multiplexing) is a transmission technology that uses a single optical fiber to simultaneously transmit multiple optical carriers of different wavelengths in optical fiber communications. All possible wavelengths are divided into several bands and referring to the ITU-T standards, we know that single-mode fiber is divided into six bands. They are O, E, S, C, L, U band.

    O-BAND stands for Original Band as it was the first band introduced. O-BAND is widely used in high-speed Ethernet transmission. O-BAND is known for its use of quartz glass, a material with zero dispersion wavelength. This small dispersion allows high-speed optical transmission without the need for dispersion compensation schemes, and it offers advantages in terms of both initial investment and operating costs. In short, transceivers are cheaper and consume less power.

    O-BAND’s long service life in datacom and telecommunications applications is primarily due to its zero dispersion. Chromatic dispersion causes signal distortion and limits data rates at high transmission speeds (gigabytes per second, Gb/s). O-BAND eliminates the need and additional cost for dispersion management such as digital signal processing (DSP) units. Therefore, O-BAND is ideally suited for high-speed, cost-sensitive high-volume markets. This helps reduce the cost of the transceiver and lowers operating costs by reducing power consumption.

    The 100G PAM4 DWDM O-BAND solution is designed for customers requiring multiple 100G connections over medium length distances. Gigalight’s COLOR X-ray module uses the PAM4 DWDM1 O-BAND silicon optical platform, which can be used in 5G fronthaul applications. The transmission distance reaches 10km. With an external SOA, it can meet the single-span transmission of 30km.

    100G QSFP28 DWDM1

    100g-qsfp28-zr4
    • Adopting 100G PAM4 silicon photonic MZ modulation technology
    • The electrical port side uses 4X 25G NRZ with built-in FEC-KP4
    • DWDM O-BAND 150GHZ, 16 channels
    • Meets 10km transmission
    • With the addition of external SOA, it can meet the requirement of single-span transmission of 30km.
    • Power consumption is expected to be less than 3.5W
    • Applied to 5G fronthaul and DCI interconnection

    Gigalight will continue to develop more non-coherent economical DWDM transmission solutions using silicon photonics and traditional technologies in 100G, 200G and 400G transmission networks, aiming to create a mid-to-long distance transmission market segment with COLOR X-ray transceiver non-coherent transceiver , and provide customers with simplified network deployment and expert-level low-cost interconnect solutions in this market segment.

    17Apr, 2024
    3 Case Studies that prove Liquid Cooling is the best solution for Next-Generation Data Centers

    In the relentless pursuit of efficiency, scalability, and sustainability, the data center industry finds itself at the precipice of a groundbreaking transformation.This article thrilled to highlight a game-changing innovation that is poised to reshape the landscape of data center infrastructure – liquid cooling. With the ever-increasing demands for computing power, the conventional methods of air cooling are reaching their limits, prompting a paradigm shift towards liquid cooling as the future of data centers.

    Liquid cooling, once reserved for niche applications, is now emerging as a scalable and efficient solution that promises to unlock the full potential of modern data centers. By dissipating heat more effectively and enabling higher-density deployments, liquid cooling addresses the escalating power densities of advanced computing equipment and positions data centers to handle the demands of emerging technologies like artificial intelligence, cloud computing, and edge computing.

    In this article, we will delve into the transformative capabilities of liquid cooling and explore the numerous benefits it offers over traditional air cooling methods. From energy efficiency and reduced operational costs to improved performance and environmental sustainability, liquid cooling is leading the charge in revolutionizing data center technology.

    What is Liquid Cooling?

    Liquid cooling, specifically immersion cooling, is an advanced method utilized by data centers to efficiently dissipate heat from IT hardware. In immersion cooling, the IT hardware, including processors, GPUs, and other components, is submerged directly into a non-conductive liquid. This liquid acts as an effective coolant, absorbing the heat generated by the hardware during its operation.

    The key principle behind liquid cooling is direct and efficient heat transfer. As the IT hardware operates, it produces significant amounts of heat due to high-performance computing tasks, such as Artificial Intelligence, Automation, and Machine Learning. To maintain optimal performance and prevent overheating, the generated heat must be dissipated effectively.

    In immersion cooling, the liquid coolant surrounds the hardware components, allowing for direct contact with the heat sources. As a result, the heat is rapidly and efficiently transferred from the components to the liquid coolant, ensuring effective cooling of the hardware.

    One of the most significant advantages of liquid cooling, especially immersion cooling, is its unparalleled efficiency and scalability. By directly immersing the hardware in the coolant, immersion cooling can handle substantially higher heat densities compared to traditional air-based cooling systems. This capability makes it an ideal choice for data centers with demanding workloads and high power densities.

    Furthermore, immersion cooling offers virtually unlimited capacity for data centers. As data center demands continue to increase, and high-performance computing trends evolve, such as AI, Automation, and Machine Learning, immersion cooling proves to be a future-proofing solution. It can sustain the power requirements and efficiently manage the rising heat production, ensuring data centers remain flexible and adaptable to emerging technologies.

    Case studies

    Case Study 1: Lawrence Livermore National Laboratory (LLNL)

    Industry: Research and High-Performance Computing

    Challenge: LLNL operates some of the world’s most powerful supercomputers for scientific research, including climate modeling, nuclear simulations, and astrophysics. These supercomputers generate immense heat, requiring an efficient cooling solution to maintain peak performance.

    Solution: LLNL adopted an immersion cooling solution for its HPC systems, submerging the server racks directly in a non-conductive cooling fluid.

    Benefits:

    Improved Cooling Efficiency: Liquid cooling effectively transferred heat away from critical components, enabling LLNL to run their supercomputers at higher power densities while maintaining optimal performance.

    Energy Savings: The increased cooling efficiency allowed LLNL to reduce the power consumption required for cooling, resulting in significant energy savings.

    Footprint Reduction: Liquid cooling eliminated the need for traditional air cooling infrastructure, reducing the physical footprint of the data center and enabling more efficient space utilization.

    Noise Reduction: The absence of cooling fans and reduced airflow resulted in a quieter and more pleasant working environment.

    Case Study 2: Advania Data Centers

    Industry: Data Hosting and Cloud Services

    Challenge: Advania Data Centers faced the challenge of efficiently cooling high-density server racks for their cloud services and data hosting operations.

    Solution: Advania Data Centers adopted an innovative two-phase liquid cooling solution to address the demanding cooling requirements.

    Benefits:

    Scalability: The liquid cooling system allowed Advania to deploy high-density server racks without compromising on cooling capacity, enabling efficient resource utilization.

    Sustainable Operations: The liquid cooling system reduced the data center’s overall energy consumption, contributing to lower carbon emissions and aligning with their sustainability initiatives.

    High Performance: With efficient cooling, Advania Data Centers achieved consistent and reliable performance for their cloud services, ensuring excellent service levels for their customers.

    Cost Savings: The reduced energy consumption and improved performance led to significant cost savings for Advania Data Centers over time.

    Case Study 3: Tech Data Advanced Solutions

    Industry: High-Performance Computing Solutions

    Challenge: Tech Data Advanced Solutions needed a cooling solution to support their high-performance computing clusters used for artificial intelligence and data analytics.

    Solution: Tech Data Advanced Solutions deployed a liquid cooling system that utilized direct-to-chip cooling technology.

    Benefits:

    Overclocking Capabilities: Liquid cooling enabled Tech Data to overclock their CPUs, achieving higher processing speeds and maximizing computing performance.

    Reduced Maintenance: Liquid cooling minimized dust buildup and prevented air circulation issues, reducing the need for frequent maintenance and downtime.

    Enhanced Performance: With improved cooling efficiency, Tech Data experienced higher CPU performance and optimized computing power for their HPC clusters.

    Future-Proofing: The liquid cooling solution positioned Tech Data to handle the heat requirements of future hardware upgrades and emerging technologies.

    These case studies exemplify how liquid cooling delivers significant benefits to data centers across various industries. From increased cooling efficiency and energy savings to scalability, sustainability, and

    improved performance, liquid cooling proves to be a game-changing technology that ensures data centers can meet the evolving demands of high-performance computing and remain at the forefront of innovation in the digital age.

    The Future of Liquid Cooling

    In conclusion, liquid cooling, specifically immersion cooling, is a game-changing technology that data centers are adopting to address the escalating demands of high-performance computing. By directly submerging IT hardware into a non-conductive liquid, liquid cooling enables efficient heat dissipation and supports the sustained performance of critical components. As the data center industry embraces cutting-edge trends and advances in AI, Automation, and Machine Learning, liquid cooling stands at the forefront, offering the highest level of efficiency and ensuring the future-proofing of data center infrastructure.