
It offers an effective modal bandwidth of over 4700 MHz*km in the 850nm to 870nm wavelength range. This significantly improves the average bandwidth within this range and effectively addresses the issue of reduced transmission distance caused by central wavelength drift.
Traditional OM4 fibre provides high bandwidth at 850nm but is limited in bandwidth for longer wavelengths with a narrow operating window. By expanding the operating window to 850~870nm, YOFC's MaxBand® OM4 Pro fibre effectively compensates for signal degradation resulting from wavelength shifts in optical modules. This ensures high-quality signal transmission, reduces connectivity costs for AI data centers, and enables a seamless upgrade for data center multimode connectivity solutions to 400G, 800G, and higher speeds.
OM4 Ultra fibre extends the operating window to 910nm, achieving dual operating windows of 850~870nm and 910nm. This innovative design supports 400Gb/s, 800Gb/s, and 1.6Tb/s single-wavelength and dual-wavelength transmission systems. Utilizing wavelength division multiplexing (WDM) technology, it enables high-speed transmission through fewer fibres, paving the way for potential upgrades to 1.6Tb/s in data centers.
YOFC MaxBand® OM5 fibre provides comprehensive high bandwidth in the 850~950nm wavelength range. It supports BiDi or SWDM multi-wavelength transmission systems from 40Gb/s to 1.6Tb/s, offering a robust fibre foundation for future SWDM transmission solutions of 1.6Tb/s and above.
With the advancement of data center technology, YOFC's MMFs have evolved from single-window to wide-window, dual-window, and multi-window solutions, offering comprehensive fibre options to customers. These innovative fibre products not only fulfill the demand for higher-speed networks but also ensure backward compatibility, facilitating seamless integration with existing technologies. By providing new fibre optic solutions, YOFC supports the green and low-carbon development of large-scale data centers in the age of AI, driving data centers toward a more efficient and environmentally friendly future.
As a global leader in optical communications, YOFC has been deeply committed to innovation in MMFs for many years. Their MMF products are widely used around the world, earning the trust and praise of numerous customers. With these groundbreaking solutions, YOFC is dedicated to satisfying the growing demand for data transmission with enhanced efficiency and reliability. In doing so, the company is facilitating the growth of data centers in the AI era and beyond by addressing their need for higher speeds.
It provides high bandwidth at wavelengths of 850nm to 870nm and 910nm. This meets the demand for 100G/Lane single-wavelength unidirectional and bidirectional transmission over distances of up to 100 meters, significantly enhancing transmission distance for single-channel 100G and Terabit BiDi links.
| Fibre Subtype | Minimum Effective Modal Bandwidth (Mkz-km) | ||||
|---|---|---|---|---|---|
| 850nm | 860nm | 870nm | 910nm | 953nm | |
| MaxBand® OM4 Standard Efficiency MMF | 4700 | \ | \ | \ | \ |
| MaxBand® OM4 Pro High Efficiency MMF | 4700 | 4700 | 4700 | \ | \ |
| MaxBand® OM4 Ultra High Efficiency MMF | 4700 | 4700 | 4700 | 3100 | \ |
| MaxBand® OM5 Standard Efficiency MMF | 4700 | \ | \ | \ | 2470 |
Figure 1: YOFC's Optimized MMF Bandwidth for 100G/Lane

Figure 2: Transmission Distances for 100G/Lane Using Different Optical Fibres
YOFC's MaxBand® OM4 Pro/Ultra series of MMFs are fully compatible with existing OM4 and OM5 fibre optic standards, as well as systems based on these standards.