A photodiode is an electronic component (a diode) composed of two semiconductors (with a p-n junction) which transforms light (photons) into an electrical signal (electrons).
The photodiode is used principally to detect and measure radiation. For example, the indium gallium arsenide (InGsAs) photodiode is a near infrared (NIR) detector used to measure the power of a laser beam, in infrared spectroscopy and in optical communications.
A photodiode is a member of the photodetector family, as are phototransistors, photoconductors and photovoltaic cells. Many different materials can be used in its fabrication, the choice determining the range of detectable wavelengths. For example, PbSe, InSb and InGaAs versions are sensitive to the infrared spectrum. Most are manufactured using MOS technology, while others use BICOMS or bipolar technologies.
Choice will depend on the wavelength to be detected, which will determine the materials to be used. Constituents will also determine photosensitivity. For example, a Ge photodiode has a sensitivity of 200nA/lux, while a Si model has a sensitivity of only 10nA/lux. Dark current characteristics should also be considered. Using the previous example, the dark current of a Si photodiode is 1000 times weaker than that of the Ge version, making it a good choice for the detection of faint light.
Current/Voltage Conversion Amplifier for CD Optical Pickups
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FEATURES ･Linearity of Ee vs IL
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PIN photodiodes for high speed applications:
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A range of UV sensors which are intrinsically blind to the visible spectrum is distributed by Scitec Instruments. ...
Sharp offers a breadth of standard IR emitters along with complimentary detection ...
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BPW21R is a planar Silicon PN photodiode in a hermetically
sealed short TO-5 case, especially designed for high
precision linear applications.
Due ...
1N100A
Applications
AM/FM detectors
Ratio ...
FEATURES
* Package configurations :XMD-MSA Type-1 compliant
* LC receptacle electrically isolated ...
Photodiode Arrays (PDA) for Scientific Applications
AMI Semiconductor's WS and HS series are two distinct families of linear self scanned photodiode arrays. These photodiode sensors employ AMI Semiconductor's proprietary ...
- Photodiode Array PA1001
- Photodiode Array PA2033
- Photodiode Array PA2100
The photosensor ...
Laser Photodiode Sensors
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Laser Photodiode Sensors
Ophir Power/Energy Meters - Smart Heads ...
Special Photodiode Products
Ophir Power/Energy Meters - Smart Heads - Special Photodiode ...
The 2998 Photodiode Array (PDA) Detector offers advanced optical detection for Waters analytical HPLC, preparative HPLC, or LC/MS system solutions. Providing unprecedented ...
