In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system can accept or emit light. The exact definition of the term varies slightly between different areas of optics. ...more on Wikipedia about "Numerical aperture"
In optics, an optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal, then amplify it electrically, and finally reconvert it to an optical signal. An optical amplifier is essentially a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Stimulated emission in the amplifier's gain medium causes amplification of incoming light. ...more on Wikipedia about "Optical amplifier"
An optical attenuator is a device used to reduce the power level of an optical signal, either in free space or in an optical fiber. They are commonly used in fiber optic communications. ...more on Wikipedia about "Optical attenuator"
The term optical axis has the following meanings: ...more on Wikipedia about "Optical axis"
An optical fiber (or fibre) is a transparent thin fiber, usually made of glass or plastic, for transmitting light. Fiber optics is the branch of science and engineering concerned with such optical fibers. ...more on Wikipedia about "Optical fiber"
An optical fiber connector constitutes a fiber-to-fiber interconnection and aligns the fiber core of two optical fibers. Due to the fast development of optical nets a variety of optical fiber connectors are available. The main difference is in the dimensions and the mechanical grip. Standard connectors are the LC, FC, ST and SC connectors. If the fiber end is angled to reduce back reflections this is usually described by adding APC (Angled Physical contact Connector) to the name. ...more on Wikipedia about "Optical fiber connector"
In telecommunication, an optical switch is a switch that enables signals in optical fibers or integrated optical circuits (IOCs) to be selectively switched from one circuit to another. ...more on Wikipedia about "Optical switch"
In telecommunication, an optical time domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. ...more on Wikipedia about "Optical time domain reflectometer"
In telecommunications, the term ovality is an attribute of an optical fiber. In particular, it is the degree of deviation from perfect circularity of the cross section of the core or cladding. ...more on Wikipedia about "Ovality"
For optical fibers, a power-law index profile is a class of graded-index profiles characterized by where n (r ) is the nominal refractive index as a function of distance from the fiber axis, n 1 is the nominal refractive index on axis, n 2 is the refractive index of the homogeneous cladding (n (r ) = n 2 when r ≥ α), α is the core radius, and g is a parameter that defines the shape of the profile. ...more on Wikipedia about "Power-law index profile"
Radiation angle: In fiber optics, half the vertex angle of the cone of light emitted at the exit face of an optical fiber. ...more on Wikipedia about "Radiation angle"
For an optical fiber or waveguide, a radiation mode or unbound mode is a mode which is not confined by the fiber core. Such a mode has fields that are transversely oscillatory everywhere external to the waveguide, and exists even at the limit of zero wavelength. ...more on Wikipedia about "Radiation mode"
In optics, a ray is an idealized narrow beam of light. Rays are used to model the propagation of light through an optical system, by dividing the real light field up into discrete rays that can be computationally propagated through the system by the techniques of ray tracing. This allows even very complex optical systems to be analyzed mathematically or simulated by computer. ...more on Wikipedia about "Ray (optics)"
Reference surface: In optical-fiber technology, that surface of an optical fiber that is used to contact the transverse-alignment elements of a component such as a connector or mechanical splice. ...more on Wikipedia about "Reference surface"
Refractive index contrast, in an optical fiber, is a measure of the relative difference in refractive index of the core and cladding. ...more on Wikipedia about "Refractive index contrast"
The Small Form-factor Pluggable (SFP) is a compact optical transceiver used in telecom and datacom applications. It is a popular industry format supported by most fiber optic component vendors. The primary advantages of this approach are hot pluggability, field replacabilty, and mix and match optical reach and type. ...more on Wikipedia about "SFP transceiver"
The SFP interface (Small Form Factor Pluggable interface) is an industry standard daughter card used in networking devices (esp. those by Cisco). It essentially interfaces a network device mother board (for a switch, router or similar device) with a fibre optic cable using an SFF Connector. Such boards can carry data at speeds of around 10GBit/s. Their main advantage is that new speeds can be interfaced to an expensive network device by changing only the SFP module. ...more on Wikipedia about "Small form-factor pluggable interface"
For an optical fiber, a step-index profile is a refractive index profile characterized by a uniform refractive index within the core and a sharp decrease in refractive index at the core- cladding interface. The step-index profile corresponds to a power-law index profile with the profile parameter approaching infinity. The step-index profile is used in most single- mode fibers and some multimode fibers. ...more on Wikipedia about "Step-index profile"
In optical fiber technology, the substitution method is a method of measuring the transmission loss by (a) using a stable optical source, at the wavelength of interest, to drive a mode scrambler, the output of which overfills (drives) a 1-meter to 2-meter reference fiber having physical and optical characteristics matching those of the fiber under test, (b) measuring the power level at the output of the reference fiber, (c) repeating the procedure, substituting the fiber under test for the reference fiber, and (d) subtracting the power level obtained at the output of the fiber under test from the power level obtained at the output of the reference fiber, to get the transmission loss of the fiber under test. ...more on Wikipedia about "Substitution method"
The Synchronous optical network, commonly known as SONET, is a standard for communicating digital information using lasers or light emitting diodes (LEDs) over optical fiber as defined by GR-253-CORE from Telcordia. It was developed to replace the PDH system for transporting large amounts of telephone and data traffic and to allow for interoperability between equipment from different vendors. ...more on Wikipedia about "Synchronous optical networking"
TOSLINK™ is a standardized optical fibre connection system. Its most common use is in consumer audio equipment, where it carries a digital audio stream between components such as MiniDisc and CD players. TOSLINK may use inexpensive 1mm plastic optical fiber or it can use higher quality multi-strand plastic optical fibers or even quartz glass optical fibers depending on the desired bandwidth and application. ...more on Wikipedia about "TOSLINK"
In fibre optic telecommunications, wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fibre by using different wavelengths (colours) of laser light to carry different signals. This allows for a multiplication in capacity, in addition to making it possible to perform bidirectional communications over one strand of fibre. ...more on Wikipedia about "Wavelength-division multiplexing"
In fiber optics, a weakly guiding fiber is one where the difference between the refractive indexes of the core and the cladding is very small (typically less than 1%). ...more on Wikipedia about "Weakly guiding fiber"
XENPAK is a standard that defines a type of fiber-optic transceiver modules which are compatible with the 10 Gigabit Ethernet (10 GbE) standard. ...more on Wikipedia about "XENPAK"
In telecommunication, the term zero-dispersion wavelength has the following meanings: ...more on Wikipedia about "Zero-dispersion wavelength" http://www.shortopedia.com, it's as simple as that! shortopedia
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