Fiber Optic Data Communication: Technology Advances and Futures

Join Kobo & start eReading today

It enables input-output of signal light through the fiber coating without cutting the fiber. To detect very weak light signals leaking from the fiber and to input light signals into the fiber efficiently, it is necessary to adjust a fiber probe with a high degree of accuracy. These two line-switching systems can be selected according to the work situation in the field.

We believe that this new technology will make it possible to complete line-switching tasks more effectively and without service interruptions. We are now conducting a field trial by using prototype systems to identify practical problems, including those involving operation and procedures for line-switching work.

• Online Fiber Optic Data Communication Technology Advances And Futures.
• Fiber-optic communication.
• Nero. Regierungsantritt und erste Maßnahmen (German Edition).
• Is fibre optics the technology of the future? › Analysis and Opinion (ABC Science).

We plan to further improve this technology taking the results of the field trial into account in order to establish it as a total solution for line-switching work. Next, we introduce our coated fiber connection technique, which makes it possible to cut and connect optical fiber without removing the fiber coating. The use of this technique eliminates the need to remove the fiber coating and to clean the fiber, and thus, the tools for this work stripper, alcohol, paper, etc. Moreover, this connection technique reduces the risk of fiber breakage because it does not require field workers to handle bare fiber directly.

This novel new connection approach incorporates two important key technologies. The first involves cleaving a coated optical fiber, and the second consists of removing the fiber coating in a connecting component.

Read tub/fiber-optic-data-communication-technology-advances-and-futures

For the cleaving method, we found that a stretching method was suitable for cleaving the coated fiber over a wide temperature range. We also clarified that for the removal technique, improving the shape of the part of the connecting component the coating was removed from made it possible to remove the fiber coating more effectively over a wide temperature range. We will continue to improve this technique in order to reduce the cost of the cleaver device and increase the percentage of successful outcomes in almost every work environment.

We are working to reduce the total cost of outside facility management and make outside work more efficient by establishing outside facility databases DBs and business applications based on three-dimensional 3D computer-aided design CAD technology.

This technology is aimed at making design and maintenance work for outside facilities simpler and more effective by constructing a 3D CAD-based outside facility DB and business applications, instead of using the conventional 2D plant records Fig. This new technology is characterized by the use of a mobile mapping system MMS to build a highly accurate 3D map.

MMS is a new spatial measurement technology certified as a public survey method; it is equipped with a GPS Global Positioning System antenna, an inertial measurement unit, a camera, and a laser scanner. We are developing a 3D point cloud DB with MMS that can automatically extract outside facilities such as poles and cables from 3D point cloud data and identify extracted facilities by accessing an existing facility DB system.

One application example is automatic detection of pole deflection and the height of cables from the 3D point cloud DB. This enables us to select particular facilities that preferentially need to be inspected from a massive number of network facilities. Moreover, by analyzing changes in the 3D point cloud DB over the years, the system can be used to automatically indicate unsafe facilities on a map.

This novel facility management system is expected to contribute to making inspection work of various facilities more efficient because it eliminates the need to dispatch workers to the field to inspect each piece of facility equipment. One of the critical issues with PON configuration is how to monitor the faults in tributaries of the optical splitter, because conventional optical time-domain reflectometry cannot obtain accurate loss distributions beyond the optical splitter.

We have devised a novel remote measurement technique that enables us to obtain the loss distribution of each branched fiber below the optical splitter using a physical phenomenon called Brillouin scattering. In this new measurement method, two optical pulses—a pump pulse and a probe pulse—are launched into an optical fiber with a time delay from an apparatus in the central office.

• Fiber Optic Data Communication: Technology Advances and Futures.
• R&D Trends in Optical Fiber and Cable Technology | NTT Technical Review!
• Bandwidth Demands Drive Fiber Optics Advances;
• Read tub/fiber-optic-data-communication-technology-advances-and-futures.
• Water Resources Quality: Preserving the Quality of our Water Resources (International Association of Geodesy Symposia, 125).
• Game Changing Advancements in Fiber Optic Cable Technology.
• Fiber Optics: Next Generation Tech.

The two launched pulses go into branched fibers through an optical splitter and are reflected at an optical termination filter installed in front of an optical network unit ONU. Because the two pulses are injected with a time delay, the probe pulse, which is launched prior to the pump pulse, reaches the reflection point at the end of the branched fiber first, and it collides with the pump pulse, which is launched with a time delay, in the tributary fiber. The optical frequencies of the two pulses are set to have a difference between them that corresponds to a Brillouin frequency shift.

What is Kobo Super Points?

When the two pulses collide, Brillouin scattering occurs in the fiber, which is when part of the energy is transferred from the pump pulse to the probe pulse. We can obtain the loss distribution of each tributary in order to analyze the returned probe pulses at the apparatus, while controlling the timing of the pulse launches. We confirmed that we were able to identify the faulty fiber and the accurate fault location in a PON configuration with an 8-branched splitter by using this method.

This new method is therefore effective for identifying fault locations in fiber branches where failures tend to occur without having to dispatch workers to the field. If this approach can be implemented practically, it will help to overcome one of the major difficulties with PONs and will also reduce maintenance costs. The bandwidth of optical fiber communication systems that form the backbone for this communication is being increased yearly.

So far, transmission capacity per optical fiber has increased by using time division multiplexing TDM and wavelength division multiplexing WDM and by increasing the multiplexing density and signal density based on various breakthroughs. However, as the density of signal multiplexing increases, the power density per cross section of fiber inevitably increases. High power density in optical fiber is known to cause nonlinear optical effects, which degrade signal characteristics, and fiber fuse, which destroys optical fiber thermally.

Space division multiplexing SDM is thought to be a potential candidate as the next multiplexing axis to break through the capacity limitation. Thus, new optical transmission technology is expected to meet the growing demand for transmission capacity. In terms of the transmission medium, two design concepts have been proposed for realizing SDM. One is multi-core fiber MCF , which has multiple individual cores in a fiber, and the other is few-mode fiber FMF , in which multiple different transmission modes can be transmitted within a single core.

We are conducting research on the transmission medium for SDM technology in order to extend the transmission capacity to meet the future explosive increase in data traffic. The MCF transmission system is illustrated in Fig. The transmission system with MCF consists of some fundamental technologies as well as those for fiber design and manufacturing. These include optical amplification technology, which amplifies multiple optical signals simultaneously; connection technology, which connects multiple cores at one time; and fan-out technology, which divides MCF into multiple SMFs.

One of the achievements in this project is that we conducted the first trial of a multi-vendor interoperability experiment with MCF technology in Fiber offers faster speeds over longer distances, outstripping its dated copper counterpart-based technologies like DSL and cable. Read on to find out some basics on the next generation technology that we get to enjoy now.

Fiber-based systems use special silica-based glass fiber, which is slightly larger than a human hair, using light waves instead of electrical pulses used in copper wire. Besides numerous industrial and entertainment uses, it's ideally suited for transmitting data, voice, and video. Optical fiber is created by heating a pure silica hollow glass rod while special gases flow inside.

Download New Essays In Free Logic: In Honour Of Karel Lambert

In optical transmission, the signal passes through the core, while a portion of it travels down the cladding. The fiber is then encased in a plastic colored casing for protection and identification. It generally costs less to install and maintain. Copper Cable Fiber Optic Strands. Just like copper, there are physical limitations to transmitting signals: Once it leaves its source, distance and various other disturbances impact signal strength like connectors, splices, and splitters. Amplifiers can boost the signal, which requires installing powered cabinets or huts.

Good designers anticipate attenuation when building a fiber optic system.