10G optical module SERDES distance
10G optical modules can transmit data from a few hundred meters up to 80 kilometers, depending on the module type and fiber used.
Short-Range (SR) Modules
10G SFP+ SR modules operate at an 850nm wavelength and use multimode fiber (OM3 or OM4). They are designed for short-distance connections, typically within data centers or between racks. The maximum transmission distance is approximately 300 meters over OM3 fiber and 400 meters over OM4 fiber. SR modules are cost-effective and ideal for high-density, intra-building links .
Long-Range (LR) Modules
10G SFP+ LR modules operate at a 1310nm wavelength and use single-mode fiber (SMF). They are suitable for medium-distance links, such as campus backbones or inter-building connections. LR modules can reliably transmit data up to 10 kilometers, providing stable connectivity for metropolitan area networks or data center interconnects .
Extended-Range (ER) Modules
ER modules operate at 1550nm wavelength over single-mode fiber and are designed for long-haul applications. They can extend transmission distances to 40 kilometers, making them suitable for regional networks or connecting multiple buildings over longer distances .
Ultra-Long-Range (ZR) Modules
10G SFP-ZR modules are optimized for ultra-long-distance transmission, typically using 1550nm wavelength over single-mode fiber. These modules can transmit data up to 80 kilometers without the need for signal amplification, making them ideal for long-haul or inter-city connections. Due to the higher optical power and longer distance, ZR modules often require thermoelectric cooling (TEC) to stabilize the laser wavelength and ensure reliable transmission .
Summary
The transmission distance of a 10G optical module depends on the type of module and fiber used:
- SR (Short-Range): 300–400 meters (multimode fiber)
- LR (Long-Range): up to 10 kilometers (single-mode fiber)
- ER (Extended-Range): up to 40 kilometers (single-mode fiber)
- ZR (Ultra-Long-Range): up to 80 kilometers (single-mode fiber) Choosing the right module requires considering the required distance, fiber type, deployment environment, and budget to ensure optimal network performance and reliability .
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