fiber-optics - Photonics Bandwidth : The range of...

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Unformatted text preview: Photonics Bandwidth : The range of frequencies over which a particular instrument is designed to function within specified limits. Infrared : The invisible portion of the electromagnetic spectrum that lies between about 0.75 and 1000 m. Laser: Light Amplification by the Stimulated Emission of Radiation. Lasers usually have low bandwidth and high power. Lasers can operate in the infrared, visible and ultraviolet regions of the optical spectrum. LED : Light Emitting Diode. LEDs work on the principle of spontaneous emission of light as opposed to stimulated emission. LEDs usually have high bandwidth but relatively low power. LEDs operate in the infrared, visible and ultraviolet regions of the optical spectrum. Optics : That branch of physical science concerned with vision and certain phenomena of electromagnetic radiation in the wavelength range extending from the vacuum ultraviolet at about 40 nm to the far-infrared at 1 mm. Now being replaced by the more inclusive term photonics. Optical fiber : A thin filament of drawn or extruded glass or plastic having a central core and a cladding of lower index material to promote internal reflection. It may be used singly to transmit pulsed optical signals (communications fiber) or in bundles to transmit light or images. Optical interconnection : The use of photonic devices rather than electronic devices to make connections within and between integrated circuits. Photodiode : A two-electrode, radiation-sensitive junction formed in a semiconductor material in which the reverse current varies with illumination. Photodiodes are used for the detection of optical power and for the conversion of optical power to electrical power. Photonics : The technology involving light and photons at all wavelengths between the far-infrared and the ultra-violet. Also called "Optoelectronics". Splice: A permanent joint whose purpose is to couple optical power among two or more ports. Also, a device whose purpose is to couple optical power between a waveguide and a source or detector. Ultraviolet: The invisible region of the spectrum just beyond the violet end of the visible region. Wavelengths range from 1 to 400 nm. Visible Spectrum : Light which can be seen by the unaided human eye, defined in our case as between 400 nm and 750 nm. Waveguide: A system or material designed to confine and direct electromagnetic waves in a direction determined by its physical boundaries. Wavelength: Electromagnetic energy is transmitted in the form of a sinusoidal wave. The wavelength is the physical distance covered by one cycle of this wave; it is inversely proportional to frequency. Fiber Optic Glossary AC: Alternating current. Acceptance Angle: The half-angle of the cone within which incident light is totally internal reflected by the fiber core. It is equal to sin-1(NA)....
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This note was uploaded on 10/22/2011 for the course ITC 101 taught by Professor Cuibap during the Three '11 term at Charles Sturt University.

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fiber-optics - Photonics Bandwidth : The range of...

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