Single-film duplex optical module
A single-film duplex optical module is a transceiver that uses single-mode fiber with duplex LC connectors for bidirectional data transmission, supporting various data rates and distances depending on the module type.
Overview
A single-film duplex optical module typically operates over single-mode fiber (SMF) and uses duplex LC connectors to transmit and receive signals simultaneously on two fibers. These modules are widely used in Ethernet, telecom, and data center networks to interconnect switches, routers, servers, and other network devices . They are available in different form factors such as SFP, SFP+, and QSFP28, supporting speeds from 1.25 Gbps to 100 Gbps .
Key Specifications
- Wavelength: Most modules operate at 1310 nm, suitable for long-distance single-mode transmission .
- Data Rate: Ranges from 1.25 Gbps (SFP) to 10 Gbps (SFP+) and up to 100 Gbps (QSFP28) .
- Transmission Distance: Depending on the module, distances can range from 500 meters to 40 km over single-mode fiber .
- Standards Compliance: Modules conform to IEEE 802.3, SFF-8431, SFP+/QSFP MSA, RoHS, and laser safety standards .
- Hot-Plug Support: Most modules support hot swapping, allowing installation or replacement without shutting down the network .
Applications
- Data Centers: High-speed interconnects between servers and switches.
- Campus Networks: Backbone connections over long distances.
- Industrial Networks: Reliable communication in harsh environments with strong ESD protection .
- Telecom: Optical links for metro and long-haul networks.
Practical Considerations
- Pairing: Modules are typically used in pairs, one at each end of the fiber link .
- Fiber Type: Ensure single-mode fiber is used for long-distance links; multimode fiber is not compatible for these modules.
- Handling: Avoid static discharge and physical damage; keep dust caps on when not in use .
- Compatibility: Check that the module matches the network equipment's SFP/SFP+/QSFP port and supports the required data rate and distance.
Examples
- XG-SFP-LR-SM1310: 10G SFP+ module, 1310 nm, up to 10 km over SMF .
- Industrial SFP 1.25G: 1310 nm, up to 20 km, duplex LC, suitable for Ethernet and telecom .
- SFP 1.25G 40 km: 1310 nm DFB laser, LC duplex, optimized for backbone and campus networks .
- 100GBASE-DR QSFP28: Single lambda 1310 nm, duplex LC, up to 500 m over SMF . These modules provide cost-effective, high-speed, and reliable optical interconnections for modern network infrastructures.
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