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Topic: Photodiode

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In the News (Tue 23 Jul 19)

  Photodiode - Wikipedia, the free encyclopedia
A photodiode is a semiconductor diode that functions as a photodetector.
Photodiodes are packaged with either a window or optical fibre connection, in order to let in the light to the sensitive part of the device.
A photodiode is a p-n junction or p-i-n structure.
en.wikipedia.org /wiki/Photodiode   (996 words)

 OSI Optoelectronics Technical Support FAQ Basic PIN Photodiode Characteristics
Photodiode operates as a voltage source as well a current source in response to the incident light in the wavelength range of 200 nm to 1100 nm.
Increasing the reverse voltage increases the response speed of the photodiode, by reducing the junction capacitance.
This is the slope of the photodiode I-V curve at -10 mV.
www.udt.com /techsupport_faq01.html   (1286 words)

Light falling on the photodiode changes the base current of the transistor, causing the collector current to be amplified.
Phototransistors may be of the two-terminal type, in which the light intensity on the photodiode alone determines the amount of conduction.
The coupler is composed of an LED and a photodiode contained in a light-conducting medium.
www.tpub.com /neets/book7/26g.htm   (713 words)

The FET input op-amp prevents the loading of the photodiode and the voltage at the output is proportional to the current in the photodiode.
So long as the photodiode response to the light is linear, the output voltage is proportional to the light falling on the photodiode.
A photodiode consists of an active p-n junction which is operated in reverse bias.
hyperphysics.phy-astr.gsu.edu /hbase/electronic/photdet.html   (184 words)

 Gamma-Photon Radiation Detector - Maxim/Dallas
A PIN photodiode, four low-noise op amps and a comparator are used to detect individual photons of gamma radiation.
Detector sensitivity, for example (the number of photons detected for a given radiation field) depends on the size of the depletion region, which in turn depends on the area of the diode and the amount of reverse bias applied to it.
If you use a high-quality PIN photodiode and an op amp with low current noise, and pay careful attention to design, the limiting factor for noise should be the first-stage op amp's input-voltage noise multiplied by the total capacitance at the op amp's inverting node.
www.maxim-ic.com /appnotes.cfm/appnote_number/2236   (906 words)

 [No title]   (Site not responding. Last check: 2007-11-06)
If a shutter in front of a photodiode, open at the time of emission of a 10 to 15 nanosecond pulse of light from a laser source, is closed just before the10 to 15 nanosecond pulse of light is supposed to arrive at the photodiode, the 10to15nanosecond pulse of light still appears at the photodiode.
The first two scope pictures show the photodiode response to light from a laser when 1)the Pockels shutter in front of the laser is pulsed full open for 15 nanoseconds every millisecond and the shutter in front of the photodiode about 30 to 35 feet away is always full open.
One possibility is that when the photodiode shutter is left open all the time the transmissibility of the crystal is greater than when the crystal is electronically pulsed 2000 times a second.
mysite.verizon.net /r9ns/Pockells1.doc   (2050 words)

 Fujifilm announce SuperCCD SR: Digital Photography Review
Where once a single photodiode* was responsible for capturing the full range of light strengths at a single location on the sensor, Fujifilm has now paired two photodiodes per photosite**: a larger, primary photodiode adjusted for high sensitivity, with the secondary photodiode for lower sensitivity.
The sensitive primary photodiode registers the main volume of light reflected off the subject (similar to a conventional Super CCD photodiode), whilst the secondary photodiode captures highlight information from the same part of the image.
Because it is set at a lower sensitivity than the primary photodiode (in other words, records a darker image), the secondary photodiode is able to 'see' additional detail in bright areas that is beyond the reach of conventional photodiodes.
www.dpreview.com /news/0301/03012202fujisuperccdsr.asp   (1181 words)

 Monolithic Photodiode and Single-Supply Transimpedance Amplifier - OPT101 - TI Product Folder
The OPT101 is a monolithic photodiode with on-chip transimpedance amplifier.
The integrated combination of photodiode and transimpedance amplifier on a single chip eliminates the problems commonly encountered in discrete designs such as leakage current errors, noise pick-up and gain peaking due to stray capacitance.
The 0.09 x 0.09 inch photodiode is operated in the photoconductive mode for excellent linearity and low dark current.
focus.ti.com /docs/prod/folders/print/opt101.html   (383 words)

Photodiode array detectors can be used to measure and detect samples over the entire UV to visible (UV-Vis) spectrum.
One technique is to use several photomultiplier tubes positioned to detect in the spectral regions of interest.
Another is to use the linear photodiode array (LPDA) spectrophotometer which measures in the 190-1100 nm region simultaneously.
kerouac.pharm.uky.edu /asrg/hplc/photodiode.html   (689 words)

 Photodiode sensor products by Pacific Silicon Sensor   (Site not responding. Last check: 2007-11-06)
This array is based on Pacific Silicon Sensor’s proprietary bearer enhanced APD processing, resulting in a spectral response range of 400nm-1100nm with each element producing an output of approximately 60 amps per watt at the popular 905nm wavelength.
Integral photodiode bias circuitry is also included, as well as a sum circuit to monitor light intensity.
The measurement is accomplished by comparing the light entering two silicon photodiode junctions superimposed on each other.
www.pacific-sensor.com /pages/pg-new.html   (2117 words)

 Segmented Photodiode provides position information., UDT Sensors, Inc.
The new Position Sensing Detector (PSD) is a common substrate photodiode that is segmented into four separate active areas.
Apr 22, 2003 - InGaAs Photodiodes have transimpedance amplifiers.
Jun 10, 2002 - Photodiode monitors output of semiconductor lasers.
news.thomasnet.com /fullstory/26955/772   (770 words)

 Photodiode : Sensors from PerkinElmer (via CobWeb/3.1 planetlab2.cs.umd.edu)   (Site not responding. Last check: 2007-11-06)
Avalanche photodiodes provide higher sensitivity than standard photodiodes.
A variety of PIN photodiodes are offered for low-high speed applications, these PINs are designed for the 250 nm to 1100 nm range.
High-quality InGaAs avalanche photodiodes (APDs) in hermetically sealed TO and fiber-optic packages designed for the 900 nm to 1700 nm wavelength region.
optoelectronics.perkinelmer.com.cob-web.org:8888 /catalog/Category.aspx?CategoryName=Photodiodes   (272 words)

 Single-Photodiode Camera Research to be Presented
In the single-pixel camera, the image from the lens is shined onto the DMD and bounced from there though a second lens that focuses the light reflected by the DMD onto a single photodiode.
In the single-pixel camera, the image from the lens is shined onto a digital micromirror device, or DMD, and bounced from there though a second lens that focuses the light reflected by the DMD onto a single photodiode.
The mirrors on the DMD are shuffled at random for each new sample, creating random patterns of fl and white, or 1s and 0s, as depicted in the schematic above.
www.photonics.com /content/tradeshows/2006/October/3/84537.aspx   (1026 words)

 Avalanche photodiode - Wikipedia, the free encyclopedia
Avalanche photodiodes (APDs) are photodetectors that can be regarded as the semiconductor analog to photomultipliers.
Since APD gain varies strongly with the applied reverse bias and temperature, it is necessary to control the reverse voltage in order to keep a stable gain.
Avalanche photodiodes therefore are more sensitive compared to other semiconductor photodiodes.
en.wikipedia.org /wiki/Avalanche_photodiode   (717 words)

 (WO/1988/004034) AVALANCHE PHOTODIODE QUENCHING CIRCUIT   (Site not responding. Last check: 2007-11-06)
The comparator (40) compares the photodiode potential with a reference voltage and changes state rapidly after initiation of a photodiode avalanche.
The photodiode (12) recharges passively through the series resistor (20) at a rapid rate since this resistor has a low value.
The transistors (30) and (42) are diactivated by comparator reset, the latter after the preset delay once more, and are isolated from the photodiode (12) during recharge by diodes (16) and (18).
www.wipo.int /pctdb/en/wo.jsp?WO=1988/04034   (437 words)

 LED as photodiode
I was contemplating to do a proper photodide+opamp+differentiator circuit but now I might just stick a photodiode directly between a PIC pin and the ground.
As I said, my main purpose was to use clear cap photodiode but I have tried a random orange LED and it works too.
I have grounded one photodiode's pin but, obviously, when used to both emit and sense light it should be tied to another port pin which is cleared low during sensing light.
forum.microchip.com /tm.aspx?m=131182   (2469 words)

 Photodiode Receivers
Our photodiodes including GaAs PIN and InGaAs PIN photodiodes and pre amplified photodiodes are highly sensitive and reliable for data and telecommunication applications.
InGaAs PIN Photodiode in TO-can for 850 nm - 1550 nm Emitter
InGaAs/InP PIN Photodiode for 1100 nm - 1650 nm Emitter
www.lasermate.com /PR.htm   (171 words)

 EOPC - Photodiode Transimpedance Amplifier
The PDA-700 is a low noise, high gain, transimpedance amplifier designed to provide a direct digital readout of the current generated from a photodiode, photomultiplier or other similar current source.
A variable bias voltage, ranging from +10V to -10V, may be digitally selected from the front panel and applied in series with the photodiode under test.
The background cancellation feature allows offsets from +200% to -200% of the selected full scale range to be added to or subtracted from the input signal.
www.eopc.com /pda700.html   (368 words)

 Current-Feedback Op Amps Save Power In Photodiode Apps   (Site not responding. Last check: 2007-11-06)
However, they're rarely used as transimpedance amplifiers in photodiode applications due to the high current noise of their inverting inputs.
The photodiode is connected to the noninverting input of amplifier a of the dual LT1396 in a gain of 2.
While risetime was measured at 6 ns (10% to 90%), bandwidth was modeled in Pspice at 75 MHz, assuming a 3-pF photodiode.
www.elecdesign.com /Articles/Index.cfm?ArticleID=2047   (413 words)

 New—Photodiode Array Detector
The Photodiode Array Detector is the detector of choice for laboratories who need maximum flexibility.
It can be used both for routine applications and applications such as method development and peak characterization.
Single-beam principle with simultaneous measurement across the photodiode array.
www.dionex.com /en-us/ins34813.html   (339 words)

 SFH2030 Silicon Photodiode
A silicon photodiode fabricated in PIN planar technology that can be operated either as a photodiode, with reverse voltage, or as a photovoltaic cell.
The device is in a 5mm package and has solder tab terminals with 2.54mm(0.1in.) lead spacing.
All you have to do is subscribe to our email newsletter and we will send you vouchers every month.
www.maplin.co.uk /Module.aspx?ModuleNo=2242   (343 words)

 photodiode - Free Music Downloads - MP3 Downloads - Download.com Music
Some neurons the the deep of middle joshie's brain decided to shed a sheer idea of the moniker that would become photodiode.
photodiode would have to own all the copyrights to the sounds.
Band History: see the now defunct site www.mp3.com for more info.
music.download.com /photodiode/3600-8363-100144210.html   (215 words)

 OSI Optoelectronics - Photodiodes, Photodetectors, InGaAs Photodiodes, Fiber Optic Receptacles and Optical Components ...
OSI Optoelectronics - Photodiodes, Photodetectors, InGaAs Photodiodes, Fiber Optic Receptacles and Optical Components for X-ray Products, Opto-assembly, Medical Products, Tele-com, Data-com and Military Applications.
Contact US UDT Sensors is combining business operations with Centro Vision and OSI Fibercomm.
And our innovative vertical integrations, along with well-established global sales roots in both Europe and U.S alike, help reduce design cycle-time and keep implementation cost to a minimum for our customers.
www.centrovision.com   (215 words)

 Hexapedia - Photodiode (via CobWeb/3.1 planetlab2.cs.umd.edu)   (Site not responding. Last check: 2007-11-06)
Photodiodes are provided with either a window or optical fibre connection, in order to let in the light to the sensitive part of the device.
Photodiodes can be used in either zero bias or reverse bias.
P-N photodiodes are used in applications similar to photoconductors.
www.hexafind.com.cob-web.org:8888 /encyclopedia/photodiode   (394 words)

 Analog Wizard™ Photodiode - Photovoltaic Mode: Home (via CobWeb/3.1 planetlab2.cs.umd.edu)   (Site not responding. Last check: 2007-11-06)
Analog Wizard™ Photodiode - Photovoltaic Mode: Home (via CobWeb/3.1 planetlab2.cs.umd.edu)
Analog Wizard™ helps you select and design in the best fit amplifier for your application needs in 3 easy steps -- Enter Parameter Values, Review Recommended Parts, and View Amplifier Solution.
You can also get more information on how to use the Wizard and more technical details on photodiode applications.
www.analog.com.cob-web.org:8888 /Wizard/photodiode/photovoltaicUserEntry   (154 words)

 Edmund Optics - Photodiode Amplifier
home : online catalog : lasers : laser accessories : photodiode amplifier : Photodiode Amplifier
This amplifier unit is a low noise, high gain, transimpedance amplifier that is designed to provide a direct digital readout of the current generated from a photodiode, photomultiplier, or similar current source.
Click this icon to receive an e-mail with delivery information.
www.edmundoptics.com /onlinecatalog/displayproduct.cfm?productID=2553   (319 words)

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