Tag Archives: fiber transceiver

Refresh hollow photonic bandgap fiber data transmission record

British scientists have claimed that the use of model-based reuse 37 hollow core photonic bandgap fiber (HC-PBGF), created a 73.7Tbit / s transfer rate of the new record. Optoelectronics Research Centre, University of Southampton, Senior Fellow Yongmin Jung and his colleagues produced the world’s first low-loss broadband 37 root core HC-PBGF, there is no internal surface mode and low crosstalk.

The 37-core hollow fiber, hollow fiber core at 19 on the basis of further weakening of these fibers inside the main loss mechanism – surface scattering. The team produced the diameter of 37μm fiber cladding spacing of 4.4μm, the relative aperture is 0.97, the band gap will be about 300nm. This fiber at 1550nm wavelength with a minimum basic pattern 3.3dB/km loss.

HC-PBGF lattice structure is rather special – larger air holes around the core of honeycomb covered. Since the signal propagation in the air, the data transfer rate is much higher than conventional fibers. Further, a transmission method is transmitted by the photonic bandgap effect, rather than the conventional fibers in the total internal reflection. Although, compared to the solid fiber, HC-PBGF has a lower nonlinearity, low loss and low latency access to more potential, but there are still some problems to be studied, especially in relation to the receiver using MIMO technology deal model of the problem.

Source: fiber optic cables, fiber optic transceiver and converter

The Other uses of optical fibers

Fibers are widely used in illumination applications. They are used as light guides in medical and other applications where bright light needs to be shone on a target without a clear line-of-sight path. In some buildings, optical fibers route sunlight from the roof to other parts of the building (see nonimaging optics). Optical fiber illumination is also used for decorative applications, including signs, art, toys and artificial Christmas trees. Swarovski boutiques use optical fibers to illuminate their crystal showcases from many different angles while only employing one light source. Optical fiber is an intrinsic part of the light-transmitting concrete building product, LiTraCon.

Optical fiber is also used in imaging optics. A coherent bundle of fibers is used, sometimes along with lenses, for a long, thin imaging device called an endoscope, which is used to view objects through a small hole. Medical endoscopes are used for minimally invasive exploratory or surgical procedures. Industrial endoscopes (see fiberscope or borescope) are used for inspecting anything hard to reach, such as jet engine interiors. Many microscopes use fiber-optic light sources to provide intense illumination of samples being studied.

In spectroscopy, optical fiber bundles transmit light from a spectrometer to a substance that cannot be placed inside the spectrometer itself, in order to analyze its composition. A spectrometer analyzes substances by bouncing light off of and through them. By using fibers, a spectrometer can be used to study objects remotely.

An optical fiber doped with certain rare earth elements such as erbium can be used as the gain medium of a laser or optical amplifier. Rare-earth doped optical fibers can be used to provide signal amplification by splicing a short section of doped fiber into a regular (undoped) optical fiber line. The doped fiber is optically pumped with a second laser wavelength that is coupled into the line in addition to the signal wave. Both wavelengths of light are transmitted through the doped fiber, which transfers energy from the second pump wavelength to the signal wave. The process that causes the amplification is stimulated emission.

Optical fibers doped with a wavelength shifter collect scintillation light in physics experiments.

Optical fiber can be used to supply a low level of power (around one watt) to electronics situated in a difficult electrical environment. Examples of this are electronics in high-powered antenna elements and measurement devices used in high voltage transmission equipment.

The iron sights for handguns, rifles, and shotguns may use short pieces of optical fiber for contrast enhancement.

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