OFS recently showcased technology developments in multimode fiber transmission at OFC 2015. Our live demonstrations showcased future advances in short-reach data center interconnects and “illustrated a paradigm shift in how multimode transceivers are standardized,” according to Systems & Technology Strategy Director Robert Lingle.
Looking forward, the most far-reaching impact will come from the trend of applying Wavelength-Division Multiplexing (WDM) to the multimode space with more than one wavelength per fiber. In fact, a new standard for wideband multimode fiber that supports four WDM wavelengths is now in process with the Telecommunications Industry Association (TIA), endorsed by the fiber, structured cabling and transceiver communities. Continue reading →
Over time, the design of outside plant (OSP) single-mode optical fibers has evolved. Originally, these fibers operated only in the 1310 nm and 1550 nm wavelengths. Then, in the 1990’s, single-mode fibers migrated to full-spectrum performance. Today, end users value fibers that offer improved macrobend performance, backward compatibility and low attenuation.
At the most recent TIA 42.11 Subcommittee meeting, Dave Mazzarese of OFS proposed defining a new, next-generation multimode optical fiber. This new fiber would facilitate the use of low-cost, coarse wavelength division multiplexing (CWDM) equipment on multimode fiber. The proposed fiber would not only provide up to four times the information carrying capacity of current OM4 fiber, but also offer the potential for even higher capacity solutions in the future, while maintaining the backward compatability to current 850 nm based systems.
This new fiber would continue to maintain the low system cost advantage that multimode fiber links have over single-mode fiber systems. The wide-band fiber is expected to initially support four wavelengths at speeds up to 28 Gb/s, providing 100+ Gb/s fiber capacity. This capability would significantly reduce the amount of fiber required to carry 400 Gb/s signals, the next-generation Ethernet speed.
Dave notes that defining a new fiber has the support of key players in the industry, including Avago, CommScope, Finisar and Panduit.
The Telecommunications Industry Association (TIA) is accredited by the American National Standards Institute (ANSI) to develop voluntary, consensus-based industry standards for a wide variety of Information and Communication Technologies (ICT) products, and currently represents nearly 400 companies. Within TIA, the 42.11 Subcommittee helps develop and maintain voluntary standards for optical fiber used in telecommunications cabling infrastructure in premises.
The electrical power industry faces numerous challenges on a daily basis. Electromagnetic interference to extremes in temperature; providing safe and reliable electricity to our homes or workplaces, power companies depend on a multitude of systems. In order to help protect their employees from dangerous high voltage while maintaining clear communication, many power companies choose fiber optic cable to connect devices in their monitoring and control systems. Continue reading →
The use of optical fiber and fiber-optic based sensors in the medical market is constantly growing. Prior to use inside the human body, fibers must be sterilized to ensure they are free of microorganisms and perform well during invasive and noninvasive medical applications such as urology, general surgery, ophthalmology, cardiology, endoscopy, dentistry, and medical sensing. OFS tested optical fibers with four separate coatings to see the effects of sterilization on attenuation and mechanical strength. Sterilization can generally be defined as any process that destroys all microbial life such as fungi, bacteria, and virus or spore forms. Before our testing, there were only a few studies directly or indirectly related to effects of sterilization on optical and mechanical properties of optical fibers which is why we felt real data knowledge and experience was at the utmost importance in order to best recommend materials for different types of sterilization in addition to which sterilization methods work best. Continue reading →
Factory automation has existed since General Motors implemented their automation department in 1947. Since then, companies around the world have been saving time and money using various control systems to improve quality, accuracy and precision. Continue reading →
Optical fiber shape sensing is a form of distributed sensing that uses scattered signals from optical fibers to ascertain local curvature and twist and thus the shape of a given structure. The twist and bend information is recorded by an interrogator which then reconstructs the fiber shape through a series of geometric formulations. Although shape sensing is aimed towards the medical market, it can be utilized in other markets as well: energy, defense, aerospace, structural health monitoring and other smart structures. Continue reading →
It’s not unusual these days for optical fiber to be installed under bends as low as 15 mm in diameter. But even under these demanding conditions, signal quality cannot be sacrificed. Therefore, manufacturers are continuously innovating new methods to improve fiber bend performance. Read More…
Adapted from manuscript by Dr. Xiaoguang Sun and Dr. Jie Li | rewrite by Anthea Croghan
As medical applications are demanding optical fibers to transmit with increasingly higher peak powers and smaller bend diameters, it has become necessary to test and develop fibers that can perform under these strenuous conditions. A study recently completed by Dr. Xiaoguang Sun and Dr. Jie Li of OFS examined laser damage to large core multimode glass optical fibers from high peak laser power, providing important insight into the damage mechanism for a particular failure mode. A two-point bend tester was used on fiber samples prepared with polymer coatings, having different refractive indices. It was found that peak power was one of the main determining factors in performance among the samples. Polymer coatings with lower refractive indices were found to significantly improve fiber resistance to bending while transmitting. Read More…
Optical fibers are successfully used in various areas of medicine, including urology, general surgery, ophthalmology, cardiology, endoscopy, dentistry and medical sensing [1 – 4]. Prior to use inside a human body the fiber must be sterilized to ensure it is free of microorganisms such as fungi, bacteria, and virus or spore forms. Read More…