FiddlLink
FiddlLink
Industry-leading connectivity solutions for next-generation networking.
FiddlLink Optical Technology Co., Ltd. is a professional manufacturer and supplier of high-performance optical transceivers and fiber optic communication solutions. Established in 2016, we specialize in the R&D, production, and global distribution of networking products for data centers and enterprise infrastructure. With over 12 years of industry depth, we provide the backbone for modern digital communication.
Our research and development team, consisting of 126 experienced engineers, works tirelessly to push the boundaries of bandwidth. In the past year, we launched 186 new products to meet the escalating demands of 400G and 800G ecosystems. Our modern facility utilizes advanced testing equipment to ensure every module meets the most stringent global standards.
Generating an annual export revenue of USD 18 million, FiddlLink serves strategic partners across North America, Europe, and Asia. Our supply chain network includes over 850 strategic partners, ensuring stable production capacity even during global shortages. We are a trusted partner for ISPs, data centers, and OEM/ODM providers worldwide.
The rapid expansion of AI-driven computing, 5G networks, and high-definition video streaming has triggered an unprecedented demand for data bandwidth. Within the modern data center, the transition from 100G to 400G is no longer a luxury—it is a necessity. At FiddlLink, we understand that the optical transceiver is the critical heartbeat of this transition. Our 100G QSFP28, 200G QSFP56, and 400G QSFP-DD modules are designed to provide the lowest latency and highest thermal efficiency in the industry.
The 100G QSFP28 remains the standard for most enterprise and carrier networks. Using four lanes of 25Gbps, it provides a cost-effective solution for short-reach (SR4) and long-reach (LR4) applications. Our modules utilize high-quality lasers (VCSEL or DFB) to ensure a Bit Error Rate (BER) that exceeds industry standards.
The move to 400G introduces PAM4 (Pulse Amplitude Modulation) signaling, doubling the data rate without increasing the baud rate. This complexity requires superior DSP (Digital Signal Processing) and thermal management. FiddlLink's 400G modules, such as the DR4 and FR4, are optimized for low power consumption, reducing the Total Cost of Ownership (TCO) for hyperscale operators.
As a leading China-based manufacturer, FiddlLink leverages the unique ecosystem of the Pearl River Delta. This provides us with immediate access to raw semiconductor wafers, high-precision optical lenses, and advanced PCB manufacturing. Our "Integrated Supply Chain" model allows us to offer lead times that are 30-40% faster than Western competitors without compromising on the quality of internal components like the TOSA/ROSA assemblies.
Every FiddlLink module undergoes a rigorous 5-step quality verification process.
Our 42-person Quality Control team manages everything from incoming material inspection to environmental reliability testing (85°C/85% RH) to ensure 10-year reliability in mission-critical environments.
All FiddlLink transceivers are fully compliant with MSA (Multi-Source Agreement) standards, CE, RoHS, and FCC. This ensures seamless interoperability with major switch vendors like Cisco, Arista, Juniper, and Huawei.
With strategic warehousing partners in Southeast Asia, Europe, and North America, we minimize transit times. We provide DDP (Delivered Duty Paid) services to simplify customs and import compliance for our global enterprise clients.
Our engineers provide 24/7 technical assistance, including remote diagnostics and compatibility programming. Whether you need custom firmware for a legacy system or support for a new AI fabric, we have the expertise to help.
Deployment of 400G DR4 and FR4 modules to support Spine-Leaf architectures. Our high-density QSFP-DD solutions enable massive throughput for cloud computing and virtualization.
Providing 100G LR4 and ER4 modules for 5G fronthaul and backhaul networks. Our industrial-temperature rated modules withstand harsh outdoor environments in telecom base stations.
The rise of Large Language Models (LLMs) requires low-latency, high-bandwidth interconnects. Our 200G/400G PAM4 modules are optimized for InfiniBand and high-speed Ethernet AI clusters.
Yes. Our modules are programmed with vendor-specific EEPROM data to ensure 100% compatibility with over 200 mainstream network equipment brands. We use original switches for rigorous compatibility testing before shipment.
QSFP-DD (Double Density) supports 8 lanes of data, allowing for speeds up to 400G and 800G, whereas QSFP56 typically supports 4 lanes of 50G (PAM4) for a total of 200G. QSFP-DD is backward compatible with QSFP28 and QSFP56 slots.
We use high-performance DSPs and premium optical components. Each 400G module undergoes a 48-hour high-temperature aging test and full traffic testing using IXIA or Spirent testers to ensure zero packet loss and optimal thermal dissipation.
Absolutely. We provide comprehensive OEM services including custom label design, firmware tuning for specific protocols, and specialized packaging. Our R&D team can develop customized hardware for unique optical distance or wavelength requirements.
Thanks to our robust China-based supply chain and 380sqm production facility, we maintain a large buffer stock of common 100G/400G modules. Standard orders are typically shipped within 3-5 business days, while custom ODM projects take 2-4 weeks.
