We have been working with our partners on
exciting new technological advancements in support of optimizing high-speed
transmission over multimode
fiber (MMF). These advancements include a
next generation MMF that we refer to as wide
band multimode fiber (WBMMF). To understand the benefits of WBMMF, let’s start by reviewing today’s commonly used transmission technique
for very high data rates over MMF.
As data rates have advanced above 28Gbps, a technique called multiplexing has been successfully standardized and deployed to deliver higher
rates for applications such as 40GE and
100GE, with 400GE and 128GFC currently in standardization. All of these applications
employ a type of multiplexing on MMF
that involves dividing the data into lower speed constituents and conveying
each over its own individual fiber within a multi-fiber cabling infrastructure, commonly
referred to as parallel transmission.
Recent developments will add an
additional multiplexing dimension enabling multiplication of MMF’s capacity
through the use of multiple wavelengths. Through wavelength
division multiplexing each
additional wavelength expands the capacity of the fiber allowing either a reduction
in the number of fibers or an increase in total channel capacity.
Existing OM3 and OM4 multimode fibers
have a rather limited ability to support high speed transmission using wavelengths
different than the 850nm wavelength for which they are optimized; however, a
new generation of multimode fiber greatly expands that ability while retaining support
for legacy 850nm applications. WBMMF can
support four or more wavelengths to significantly improve capacity. For example, this new type of fiber could enable transmission of 100Gbps
over a single pair of fibers rather than the four or 10 pairs used today.
CommScope is working diligently with leading
ecosystem partners in the fiber, transceiver, server/switch and high
performance computing industries to foster coordinated development of both new
fiber technology and new transceiver technology. When combined, these two advancements will offer
unprecedented capacity while maintaining the value that multimode
transmission has always offered for short-reach communications channels.
CommScope and our partners will bring proposals into standards
committees starting with the Telecommunications
Industry Association (TIA) TR-42 meeting next month. We look forward to keeping you informed on
the progress of these proposals.If you have any questions regarding the benefits
of WBMMF, leave a comment below and I will be sure to get back to you.