OM5 is the latest standardized iteration of multi-mode optical fiber and is also known as “Wideband Multi-Mode Fiber” (WBMMF). This new classification was introduced to support short-wavelength division multiplexing (SWDM), a technology that significantly increases the capacity of multi-mode fibers by using multiple short wavelengths. Here are some essential details about OM5:
- Core/Cladding Diameter: Like its predecessors (OM3 and OM4), OM5 has a core diameter of 50 micrometers (µm) and a cladding diameter of 125 µm.
- Wavelength: While OM3 and OM4 fibers are optimized mainly for 850nm wavelength operation, OM5 is designed to operate over a range of wavelengths between 850nm and 953nm. This range allows it to support SWDM, which uses multiple wavelengths to increase the data capacity of a fiber.
- Data Rate and Distance: OM5 supports:
- 40 Gbps and 100 Gbps data rates for distances up to 440 meters and 150 meters, respectively, using SWDM.
- Jacket Color: The typical jacket color for OM5 fiber is lime green, distinguishing it from the aqua-colored OM3 and OM4 fibers.
- Usage: OM5 fibers are suitable for high-speed, high-capacity data center interconnects where space is limited, and an increased capacity is required without installing additional fibers.
- Applications: OM5 is designed to support emerging applications that utilize SWDM to send multiple data streams on different wavelengths through the same fiber. This capability allows for expanded data transmission without having to increase the number of fibers.
- Effective Modal Bandwidth (EMB): OM5 provides an EMB of at least 4700 MHz·km over the range from 850nm to 953nm.
- Cost: Due to its advanced capabilities and newer technology, OM5 may have a higher cost compared to OM3 and OM4 fibers. However, the ability to transport more data over the same fiber using SWDM can provide cost savings in specific scenarios.
In summary, OM5 has been introduced to cater to the growing demand for more bandwidth, especially in data center environments. Its ability to support SWDM positions it as a forward-looking solution that’s primed to handle future technological advancements in optical communications.