10km optical module and 40

Optical modules for 10 km and 40 km differ in reach, wavelength, and application, with 10 km modules suited for short-range data center links and 40 km modules designed for extended-reach metro or backbone networks.10 km Optical Modules10 km modules are typically short-reach transceivers used in data centers or enterprise networks. Examples include:100G CWDM Single Lambda 10 km: Operates on wavelengths 1271, 1291, 1311, or 1331 nm, carrying 100 Gbps on a single optical lane using PAM4 modulation at 50 Gbaud. These modules often use a pair of CWDM transceivers with passive MUX/DEMUX to aggregate multiple channels over a single fiber pair, achieving up to 400 Gbps aggregate bandwidth .10G SFP+ LR (10 km): Uses 1310 nm wavelength over single-mode fiber (SMF), supporting 10 Gbps Ethernet. These modules are cost-effective for intra-data center or campus links. Applications: Short-distance interconnects, data center racks, and enterprise LANs where fiber loss is minimal and high-speed connectivity is required.40 km Optical Modules40 km modules are extended-reach transceivers designed for long-distance transmission over SMF. Key examples include:10G SFP+ 40 km (10GBASE-ER): Operates at 1550 nm, using duplex LC connectors, supporting Digital Optical Monitoring (DOM/DDM), and providing a link budget around 15 dB. Ideal for metro networks, enterprise backbones, and storage area networks .100G QSFP28 40 km modules: Variants like 100GBASE-ER4L or 100G OWDM support 40 km transmission at 1310 nm or O-band wavelengths, often with FEC enabled for reliable high-speed links. These modules are used in data center interconnects (DCI), metropolitan area networks, and telecom backbones .10G SFP+ BiDi WDM 40 km: Uses a single wavelength per fiber strand (e.g., 1270/1330 nm) with LC simplex connectors, allowing point-to-point connections over long distances without requiring additional fibers . Applications: Long-haul connections between data centers, metro networks, and carrier backbones where low-loss SMF and stable high-speed transmission are critical.Key Differences Between 10 km and 40 km ModulesFeature10 km Modules40 km ModulesTypical Data Rate10G or 100G10G or 100GWavelength1270–1330 nm (CWDM) or 1310 nm1310 nm, 1330 nm, 1550 nmFiber TypeSingle-mode fiber (G.652)Single-mode fiber (OS2/SMF)ConnectorLC duplexLC duplex or simplex (BiDi)ReachUp to 10 kmUp to 40 kmUse CaseData center, campus LANMetro, DCI, backbone networksModulationPAM4 (100G), NRZ (10G)PAM4 (100G), NRZ (10G)Link BudgetLower, minimal amplificationHigher, may require FEC for reliabilitySummary: 10 km optical modules are optimized for short-range, high-density environments, while 40 km modules are engineered for extended-reach applications requiring higher link budgets, longer wavelengths, and often FEC support. Choosing between them depends on distance, network architecture, and required data rate.