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photodetector Dictionary Terms

photoplethysmography
Photoplethysmography (PPG) is a non-invasive optical technique used to detect changes in blood volume in tissues. It...
APD detector
An APD detector, or avalanche photodiode detector, is a type of photodetector used to detect light or optical signals by...
optical materials
Optical materials refer to substances or compounds specifically chosen for their optical properties and used in the...
silicon photodiode
A silicon photodiode is a semiconductor device that converts light into an electrical current. It is a type of photodetector...
fiber optic transceiver
A fiber optic transceiver, often simply referred to as an "optical transceiver," is a device used in fiber optic...
photodetector
A photodetector, also known as a photosensor or photodiode, is a device that detects and converts light into an electrical...
intrinsic detector
A photodetector composed of a photoconductive material that, when exposed to radiation, conducts without the aid of added...
infrared light-emitting diode
An infrared light-emitting diode (IR LED) is a semiconductor device that emits infrared light when an electric current...
quantum well
A quantum well is a structure in quantum mechanics that confines particles, such as electrons or holes, in one spatial...
flow cytometry
Flow cytometry is a powerful technique used in biology and medicine for the quantitative analysis of the physical and...
Doppler-spread imaging
An imaging process, similar to specific Doppler mapping radar techniques, that utilizes a laser, an optical imaging system,...
mask spectrometer
Instrument that uses absorption spectroscopy to detect gases in planetary atmospheres. Dispersed incoming radiation is...
GRIN lens
A GRIN (gradient index) lens is a type of optical lens that utilizes a gradient in refractive index across its volume rather...
extrinsic detector
A photodetector composed of a semiconductor material whose responsive properties can be altered by the addition of...
scintillation crystal
A scintillation crystal, also known simply as a scintillator, is a material that emits light when it interacts with ionizing...
optical noise
Optical noise refers to undesirable fluctuations or disturbances in an optical signal that can affect the quality or...
indium phosphide
Indium phosphide (InP) is a compound semiconductor material composed of indium (In) and phosphorus (P). It belongs to the...
dark noise
The noise produced in a photodetector when the photocathode is shielded from all external optical radiation and operating...
infrared photodetector array
An impurity-doped silicon detector array sensitive to long infrared wavelengths, installed in optical collecting systems...
platinum silicide
A semiconductor material used in photodetectors, sensitive in the infrared up to 5 µm.
III-V material
In semiconductor physics and materials science, the term "III-V materials" refers to compounds composed of elements from...
TO package
Housing that resembles a small metal can for a semiconductor component, photodetector or similar device.
light fidelity
LiFi, short for light fidelity, is a wireless communication technology that utilizes visible light or infrared light to...
laser-induced fluorescence
Laser-induced fluorescence (LIF) is a spectroscopic technique that involves using a laser to excite molecules or atoms,...
spectrograph
An optical instrument for forming the spectrum of a light source and recording it on a film. The dispersing medium may be a...
optical memory
1. The direct storage of data as bits in memory using optical systems and properties. The memory makes use of a laser beam...
gain
Also known as amplification. 1. The increase in a signal that is transmitted from one point to another through an amplifier....
MSM photodiode
A metal-semiconductor-metal (MSM) photodiode is a type of photodetector that consists of metal electrodes on a semiconductor...
card reader
A system that generally uses a photodetector to decode punched cards for information, or for input to a computer, by sensing...
InGaAs photodiode
An InGaAs photodiode refers to a photodetector device that is constructed using a semiconductor material composed of a...
single-photon avalanche diode
A single-photon avalanche diode (SPAD) is a specialized type of photodetector designed to detect extremely weak optical...
quantum photodetector
optical coherence tomography imaging system
Optical coherence tomography (OCT) is an imaging technique used in medical diagnostics and biomedical research to obtain...
responsive quantum efficiency
The number of electrons emitted per photon incident upon a photodetector.
scintillation detector
A scintillation detector is a radiation detection device that utilizes scintillation crystals to detect and measure ionizing...
optical head
In compact disc and CD-ROM technology, the portion of the drive that projects the laser light onto the surface of the media...
dark current
The current that flows in a photodetector when there is no optical radiation incident on the detector and operating voltages...
delay time
The interval between direction of signal to a light-emitting diode and attainment of 10 percent output current in the...
field effect transistor photodetector
A photodetector employing photoregeneration of carriers in the channel region of an FET structure to provide photodetection...
light-powered telephone
Technology that relies on a highly efficient photodetector that can detect incoming light signals at one frequency and...
rear facet monitor
A photodetector mounted in the same package as a laser diode that is positioned to monitor the output from the rear facet of...
fiber optic gyroscope
A fiber optic gyroscope (FOG) is a type of gyroscope that uses the interference of light waves to detect changes in...
quantum efficiency
Quantum efficiency (QE) is a measure of the effectiveness with which a device or system, typically in the context of...
fall time
Measurement of the interval during which a photodetector's signal and output current drops from 90 to 10 percent.
PIN photodiode
A PIN photodiode is a type of photodetector or semiconductor device used to convert light signals into electrical signals....
quantum detector
A photodetector in which an electrical charge is produced when incident photons change electrons within the detecting...

(46 results found)

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