Single-mode single-fiber transceiver model description
Single-mode single-fiber transceivers are optical modules designed for long-distance, high-speed data transmission over a single strand of fiber, with types including LX, EX, ZX, BiDi, CWDM, and DWDM.
Overview
Single-mode SFP (Small Form-factor Pluggable) transceivers use a laser-based transmission over single-mode fiber (SMF) with a core size of approximately 9 µm, operating at wavelengths typically 1310nm or 1550nm. They are hot-swappable and widely used in switches, routers, and media converters for long-distance links, ranging from 10 km to over 80 km depending on the module type and optical power budget. Single-mode transceivers are ideal for campus backbones, metro networks, and telecom applications due to low attenuation and minimal modal dispersion compared to multimode fibers .
Common Types of Single-Mode SFP Transceivers
- 1000BASE-LX
- Standard long-range module for Gigabit Ethernet.
- Typical distance: up to 10 km.
- Wavelength: 1310nm.
- Widely supported and cost-effective .
- 1000BASE-EX
- Extended range beyond LX modules.
- Distance: up to 40 km.
- Suitable for scenarios where standard LX is insufficient .
- 1000BASE-ZX
- Designed for long-haul applications.
- Distance: 70–80 km or more.
- Higher optical power may require attenuators for short links .
- BiDi (Bidirectional) SFP
- Transmits and receives data over a single fiber strand using two different wavelengths.
- Ideal for fiber-limited environments like FTTH or access networks .
- CWDM (Coarse Wavelength Division Multiplexing) SFP
- Allows multiple optical signals on the same fiber using different wavelengths.
- Increases fiber capacity without additional cabling .
- DWDM (Dense Wavelength Division Multiplexing) SFP
- Used in high-capacity, long-distance networks.
- Supports multiple channels over a single fiber for telecom and metro networks .
Key Features
- High Data Rates: 1 Gbps to 400 Gbps depending on module type .
- Low Power Consumption: Energy-efficient for large-scale deployments .
- Digital Diagnostics Monitoring (DDM): Monitors temperature, voltage, current, and optical power for proactive maintenance .
- Hot-Pluggable: Can be replaced or upgraded without shutting down devices .
- Compatibility: Works with various form factors including SFP, SFP+, QSFP, and CFP .
Applications
- Data Centers: Long-distance interconnects between racks or buildings.
- Telecommunications: Metro and long-haul networks.
- Enterprise Networks: Campus backbones and uplinks.
- Industrial Networks: CCTV, IIoT, and outdoor deployments . Single-mode single-fiber transceivers provide reliable, long-distance connectivity with high bandwidth and low signal loss, making them essential for modern networking infrastructure.
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