A form of high-power microscope objective where the space between the object and the first element is filled with an oil having the same index as that element. This form reduces losses, increases the numerical aperture of the lens and permits better...

A fiber optic cable assembly refers to a complete unit consisting of optical fibers, connectors, protective jackets, and...

A liquid crystal light valve (LCLV), also known as a spatial light modulator (SLM), is an optical device that modulates the...

The use of a material's emissivity to measure absorption. It is useful as an absorption loss measurement technique, since at...

In a lens, the square of the radius of its aperture divided by the product of the focal length and the wavelength. It...

Scattering caused by the interaction between ingoing and outgoing particles of the same type, with no loss of kinetic energy.

The glossy appearance of an object viewed, because of the binocular combination of two very unlike colors.

When splitting the output of a single optical fiber into two or more fibers, the difference in the maximum loss between any...

In an optical waveguide, that loss attributable to macrobending. Macrobending usually causes little or no radiative loss.

The direct cladding used for fused silica cores to create large numerical aperture fibers and used as overcoats to...

Transmission loss in optical fibers caused by packaging processes; it is considered a power-coupling effect from the guided...

A multimode laser characteristic defined as the ratio of power loss for the second mode to that of the lowest mode.

Ultraviolet (UV) fiber optics refers to optical fibers that are designed and optimized for the transmission of ultraviolet...

A waveguide is a physical structure or device that is designed to confine and guide electromagnetic waves, such as radio...

The Lorentz oscillator model is a theoretical model used in physics to describe the response of a charged particle (such as...

A telescope lens is a primary optical component of a telescope system that gathers and focuses light to form an image. It is...

A technique used in integrated optics where a groove is cut on a substrate surface and covered by a thin film to facilitate...

An instrument used to measure backscatter as well as optical return loss and reflectance within an optical fiber system by...

The total optical power loss caused by the insertion of an optical component such as a connector, splice or coupler into a...

The standard unit used to express gain or loss and relative power levels. The decibel (dB) = 10 log (P2/P1).

A medium that scatters or absorbs radiation that passes through it.

Loss intrinsic to the fiber caused by parameter (core dimension, profile parameter) mismatches when two nonidentical fibers...

In an optical system, noise created by mode-dependent optical losses and variations in the distribution of radiant power...

Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light...

An infrared-transmitting optical fiber with a hollow core; it can be square, round or rectangular in cross section. Capable...

Optical fiber that transmits a greater percentage of input light than does high-loss step-index fiber. Low-loss fiber...

Diffraction efficiency is a measure of how effectively a diffractive optical element (DOE) or diffraction grating directs...

In an optical waveguide, a ray for which geometric optics would predict total internal reflection at the core boundary, but...

An electro-optic modulator (EOM) is a device used to modulate the amplitude, phase, or polarization of light waves using an...

A scientific CMOS (complementary metal-oxide-semiconductor) camera is a type of digital camera specifically designed for...

The loss of optical power in an optical fiber because radiation escapes through its bends. The radiation loss caused by...

Optical glass refers to a type of glass specifically engineered and manufactured for use in optical components and systems,...

A laser system consisting of a planar PN junction within a single crystal of gallium arsenide. The pair of parallel,...

Reflection losses incurred at input and output of optical elements because of the difference in refractive index between...

Photobleaching is a phenomenon in which the fluorescence of a fluorophore (a fluorescent molecule or dye) is permanently...

A microbubble resonator is a device used in photonics and optical physics for the precise manipulation of light waves. It...

A transducer is a device or component that converts one form of energy into another. It is commonly used in various fields,...

A dichroic coating, also known as a dichroic filter or dichroic mirror, is an optical coating designed to selectively...

The ratio of the radiant power transmitted to the second surface of a medium to the corresponding radiant power that has...

The theorem stating that, when the sampling period in a recorded sample hologram is matched to the object spectrum, the...

The transfer of energy lost by radiation to the body, relative to the loss of energy per unit of path traveled.

A laser device used to establish a location or target usually for detection by an impact source e.g. missiles and guided...

Attenuation refers to the gradual loss or reduction of intensity, force, or magnitude of a particular property as it...

A dispersion-shifted fiber (DSF) refers to a type of optical fiber designed to minimize the effects of chromatic dispersion,...

A type of optical fiber loss resulting from the misalignment of fibers in a splice or connector.

A beam instability, induced by index of refraction inhomogeneities and component damage of dirt and dust particles, that...

A photometer for measuring gloss by comparing the specular reflectance to that from a perfect specular reflector.

Dewetting is a phenomenon in materials science and physics where a thin film or coating spontaneously undergoes a process of...

Scientific complementary metal-oxide semiconductor (sCMOS) refers to a type of image sensor technology specifically designed...

Low-insertion-loss fiber coupler fabricated from a sheet of light-sensitive material laminated onto a fused quartz substrate...

Photonic crystals are artificial structures or materials designed to manipulate and control the flow of light in a manner...

A means of testing optical fiber for macrobending losses by wrapping the fiber once at very low tension around a mandrel,...

Point at which a laser's material gain is equal to, or greater than, the circuit losses.

The total optical power loss in a system. The loss budget is often stated in terms of the transmitted power and the power...

Angular deviation from the optimum alignment of source to optical waveguide, waveguide to waveguide, or waveguide to...

Synonym of extrinsic fiber loss.

In optical fiber, sharp but microscopic curvatures that create local axial displacements of a few microns and spatial...

The decrease in power that occurs when an optical beam or signal is transmitted through a system.

A method that produces low-loss optical fibers. A glass tube rotates while reactants pass through the tube and heat is...

The optical power loss caused by a space between axially aligned fibers.

Property of a surface which, because of directional reflection, is responsible for the degree to which reflected highlights...

A device used to measure power loss in fiber optic connectors, cables or systems.

An optical fiber in which ions of a rare-earth element, such as neodymium, erbium or holmium, have been incorporated into...

1. A piece of glass with plane parallel surfaces used to admit light into an optical system and to exclude dirt and...

Brillouin scattering is a phenomenon in physics where an incident electromagnetic wave (usually light) interacts with...

A synchrotron is a type of particle accelerator that uses magnetic fields to steer charged particles, typically electrons or...

Heat loss determined by the sum of rising and falling slopes at a constant temperature.

Loss mechanisms that degrade the performance of all thin-film optical devices by removing radiant flux out of the specular...

The effect that the optical losses in a medium can grow when the medium is irradiated with light at certain wavelengths.

A theoretical analysis of radiation loss from planar optical waveguides due to scattering by surface irregularities/surface...

An optical time-domain reflectometer (OTDR) is a specialized instrument used in optical fiber communications to characterize...

Modified chemical vapor deposition (MCVD) is a technique used in the fabrication of optical fibers. It is a specialized form...

A fiber optic imaging bundle is a specialized optical device composed of multiple optical fibers bundled together. Each...

Also referred to as a band-stop or band rejection filter; a notch filter is a filter that is designed to screen out a very...

The use of thin flexible glass or plastic fibers as wave guides — or "light pipes" — to channel light from one...

The loss of focus of a camera sensor because of excessive brightness, characterized by the enlargement of spot size and...

An otoscope is a medical device used by healthcare professionals, particularly ear, nose, and throat (ENT) specialists,...

A device used in measuring attenuation in optical fiber. The loss caused by the bends in a short reference length of fiber...

Laws that predict the maximum power output as a function of tube diameter for a hydrogen cyanide laser of a given discharge...

A loss of resolution or detail in a television signal caused by the size of the electron scanning beam.

A power loss caused by transverse or lateral deviation from optimum alignment of source to optical waveguide, waveguide to...

Optical fiber in which the attenuation exceeds the normally acceptable level for long-haul or data communications use.

A MEMS fiber optic switch is a microelectromechanical system (MEMS) device designed to selectively route optical signals...

Optical cements and adhesives are specialized materials used in the assembly and bonding of optical components in optical...

A linear image sensor is a type of solid-state electronic device used to capture and convert light into electrical signals....

A wide-field multiobject spectroscopy system used in astronomy, in which a bundle of low-loss optical fibers positioned on...

Optical fiber optic switches are devices used in optical fiber communication systems to selectively route optical signals...

Custom lapping and polishing services involve specialized processes used to improve the surface finish and dimensional...

A method of measuring microbending losses in optical fiber by sandwiching a length of fiber between two parallel plates,...

The figure of merit of a resonator, defined as (2p) x (average energy stored in the resonator)/(energy dissipated per...

Method for studying absorption coefficients of low-loss materials, in which a sample is allowed to come to thermal...

An antireflection coating (AR coating) is a thin film or coating applied to optical surfaces, such as lenses or windows, to...

Energy loss encountered at connectors in optical fiber transmission systems. The major contributors are mutual core...

Optical fiber channel characterization scheme based on three assumptions; the discrete mode spectrum can be replaced by a...

In passive optical components, loss that varies as the polarization state of the propagating wave changes. Expressed as the...