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Hard-clad Silica Optical Fiber
Hard-clad silica (HCS) or polymer-clad fiber (PCF) is an optical fiber with a core of silica glass (diameter: 200 µm) and an optical cladding made of special plastic (diameter: 230 µm). In contrast to all-silica fiber, the core and cladding can be separated from each other. Due to their medium bandwidths and transmission rates of less than 100 Mbit/s, HCS fibers are suitable for distances of up to 2 km, e.g. in local networks in buildings and industry. Generally, the following applies: The higher the attenuation, the shorter the distance. For comparison, plastic optical fibers (POF) have low bandwidths and transmission rates (typically 100 Mbit/s). They also have a high attenuation and therefore, the maximum distance is around 100 meters. Glass fibers on the other hand have very high bandwidths and transmission rates of up to GBit/s. The attenuation in glass fibres is much lower, glass fibers can cover distances of more than 10 km. Regarding bandwidth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Fiber
An optical fiber, or optical fibre in Commonwealth English, is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than electrical cables. Fibers are used instead of metal wires because signals travel along them with less loss; in addition, fibers are immune to electromagnetic interference, a problem from which metal wires suffer. Fibers are also used for illumination and imaging, and are often wrapped in bundles so they may be used to carry light into, or images out of confined spaces, as in the case of a fiberscope. Specially designed fibers are also used for a variety of other applications, some of them being fiber optic sensors and fiber lasers. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Core (optical Fiber)
The core of a conventional optical fiber is the part of the fiber that guides the light. It is a cylinder of glass or plastic that runs along the fiber's length. The core is surrounded by a medium with a lower index of refraction, typically a cladding of a different glass, or plastic. Light travelling in the core reflects from the core-cladding boundary due to total internal reflection, as long as the angle between the light and the boundary is greater than the critical angle. As a result, the fiber transmits all rays that enter the fiber with a sufficiently small angle to the fiber's axis. The limiting angle is called the acceptance angle, and the rays that are confined by the core/cladding boundary are called guided rays. The core is characterized by its diameter or cross-sectional area. In most cases the core's cross-section should be circular, but the diameter is more rigorously defined as the average of the diameters of the smallest circle that can be circumscribed abou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silica Glass
Fused quartz, fused silica or quartz glass is a glass consisting of almost pure silica (silicon dioxide, SiO2) in amorphous (non-crystalline) form. This differs from all other commercial glasses in which other ingredients are added which change the glasses' optical and physical properties, such as lowering the melt temperature. Fused quartz, therefore, has high working and melting temperatures, making it less desirable for most common applications. The terms fused quartz and fused silica are used interchangeably, but can refer to different manufacturing techniques, as noted below, resulting in different trace impurities. However fused quartz, being in the glassy state, has quite different physical properties compared to crystalline quartz. Due to its physical properties it finds specialty uses in semiconductor fabrication and laboratory equipment, for instance. Compared to other common glasses, the optical transmission of pure silica extends well into the ultraviolet and infra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
All-silica Fiber
All-silica fiber, or silica-silica fiber, is an optical fiber whose core and cladding are made of silica glass. The refractive index of the core glass is higher than that of the cladding. These fibers are typically step-index fibers. The cladding of an all-silica fiber should not be confused with the polymer overcoat of the fiber. All-silica fiber is usually used as the medium for the purpose of transmitting optical signals. It is of technical interest in the fields of communications, broadcasting and television, due to its physical properties of low transmission loss, large bandwidth and light weight. Applications The practical application of optical fibers in various optical networks determines the requirements for the technical performance of optical fibers. For short-distance fiber-optic transmission networks, the multi-mode optical fiber is suitable for laser transmission and wider bandwidths, so as to support larger capacity of serial signal information transmission. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HCS En 1
HCS may refer to: Education * Hackensack Christian School, in New Jersey, United States * Hallett Cove School, in Adelaide, South Australia * Hampshire Country School, in New Hampshire, United States * Hampton Christian Schools, in Virginia, United States * Hardin County Schools, in Kentucky, United States * Harrisburg Christian School, in Pennsylvania, United States * Hereford Cathedral School, in England * Heritage Christian School (other) * Heritage College Sydney, in New South Wales, Australia * Highland Catholic School, in Minnesota, United States * Hilltop Christian School, in North Carolina, United States * Hinsdale Central School, in New York, United States * Hooghly Collegiate School, in West Bengal, India * Holland Christian Schools, in Michigan, United States * Holy Cross School (other) * Horry County Schools, in South Carolina, United States * Hull Collegiate School, in England Biology and medicine * Hajdu–Cheney syndrome * High-content screenin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HCS En 2
HCS may refer to: Education * Hackensack Christian School, in New Jersey, United States * Hallett Cove School, in Adelaide, South Australia * Hampshire Country School, in New Hampshire, United States * Hampton Christian Schools, in Virginia, United States * Hardin County Schools, in Kentucky, United States * Harrisburg Christian School, in Pennsylvania, United States * Hereford Cathedral School, in England * Heritage Christian School (other) * Heritage College Sydney, in New South Wales, Australia * Highland Catholic School, in Minnesota, United States * Hilltop Christian School, in North Carolina, United States * Hinsdale Central School, in New York, United States * Hooghly Collegiate School, in West Bengal, India * Holland Christian Schools, in Michigan, United States * Holy Cross School (other) * Horry County Schools, in South Carolina, United States * Hull Collegiate School, in England Biology and medicine * Hajdu–Cheney syndrome * High-content screenin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multi-mode Optical Fiber
Multi-mode optical fiber is a type of optical fiber mostly used for communication over short distances, such as within a building or on a campus. Multi-mode links can be used for data rates up to 100 Gbit/s. Multi-mode fiber has a fairly large core diameter that enables multiple light modes to be propagated and limits the maximum length of a transmission link because of modal dispersion. The standard G.651.1 defines the most widely used forms of multi-mode optical fiber. Applications The equipment used for communications over multi-mode optical fiber is less expensive than that for single-mode optical fiber. Typical transmission speed and distance limits are 100 Mbit/s for distances up to 2 km (100BASE-FX), 1 Gbit/s up to 1000 m, and 10 Gbit/s up to 550 m. Because of its high capacity and reliability, multi-mode optical fiber generally is used for backbone applications in buildings. An increasing number of users are taking the benefits of fiber closer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-mode Optical Fiber
In fiber-optic communication, a single-mode optical fiber (SMF), also known as fundamental- or mono-mode, is an optical fiber designed to carry only a single mode of light - the transverse mode. Modes are the possible solutions of the Helmholtz equation for waves, which is obtained by combining Maxwell's equations and the boundary conditions. These modes define the way the wave travels through space, i.e. how the wave is distributed in space. Waves can have the same mode but have different frequencies. This is the case in single-mode fibers, where we can have waves with different frequencies, but of the same mode, which means that they are distributed in space in the same way, and that gives us a single ray of light. Although the ray travels parallel to the length of the fiber, it is often called transverse mode since its electromagnetic oscillations occur perpendicular (transverse) to the length of the fiber. The 2009 Nobel Prize in Physics was awarded to Charles K. Kao for hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastic-clad Silica Fiber
In telecommunications and fiber optics, a plastic-clad silica fiber or polymer-clad silica fiber (PCS) is an optical fiber that has a silica-based core and a plastic cladding. The cladding of a PCS fiber should not be confused with the polymer overcoat of a conventional all-silica fiber. Usage The main applications of plastic-clad silica fiber are industrial, medical or sensing applications where cores that are larger than those used in standard data communications fibers are advantageous. PCS fibers in general have significantly lower performance characteristics, particularly higher transmission losses and lower bandwidths, than all-glass fibers. See also * Plastic optical fiber *Hard-clad silica optical fiber Hard-clad silica (HCS) or polymer-clad fiber (PCF) is an optical fiber with a core of silica glass (diameter: 200 µm) and an optical cladding made of special plastic (diameter: 230 µm). In contrast to all-silica fiber, the core and cla ... References * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
