Optoelectronic Devices (Rahul Raj).pptx

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Optoelectronic Devices By Sree Raj Mani Raj

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Optoelectronic DevicesSlide 1: IntroductionSlide 2: Aim of Presentation• Optoelectronic Devices• Categorization of Optoelectronics• Type of Optoelectronic Devices• EmittersSlide 3: Optoelectronic devices are a combination of electronic device and optics (light). Optoelectronic devices convert electrical to optical and optical to electrical transducers. It is based on the quantum mechanical effects of light on electronic devices.Slide 4: Pictorial presentation of optoelectronic devicesSlide 5: Categorization of optoelectronicsDevice that converts electric to light (visible or invisible light) is called Emitters.Device that convents light into electricity in non-solid state device is called photoemissive and in solid state device is called photodetectors.Slide 6: Types of optoelectronicsEmitters: As said earlier emitters are sub-classified into LED, Laser (LD) and IR.Couplers or Insulators: A device that transfers electrical signal between two isolated circuits by using lightSensors: It is a converter that measures a physical quantity and converts it into a signal which can be read by an observer or by an electronic instrument/device. It is classified into photodetectors and photo emissiveSlide 7: In this presentation we are going to learn more about emitters.• LED’s (Light-emitting diodes)• LD (Laser diodes)• IR (Infrared)Slide 8: LED’s : It is a semiconductor diode that emit incoherent narrow-spectrum light when electrically biased in forward direction of p-n junction. Early LED’s emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelength with very high brightness.Slide 9: The following are the colors and wavelength o LED’sSlide 10: Application of LED’s. It is used in • Visual Signals• Sensors• Communication• Television, DVD player• Barcode scannersSlide 11: Here are the examples.Slide 12: Laser diode is an electrically pumped semiconductor laser in which the active medium is formed by a p-n junction of a semiconductor diode. Laser diode are mono-chromatic and coherent.Slide 13: The following are wavelength of laser diodes.Slide 14: Application of LD’s. It is used in • Telecommunication• Barcode readers• CD/DVD, HD, Blu-ray players• Industrial applicationSlide 15: Here are the examples.Slide 16: Infrared was discovered by Astronomer William Herschel. Infrared light is electromagnetic radiation with longer wavelengths than those of visible light. IR are mostly used in industrial, scientific and medical applications.Slide 17: Application of IR. It is used in• Hyperspectral imaging• Heating• Communications• Climatology• AstronomySlide 18: Here are the examples.Slide 19: Thank you for viewing my PPT.

Transcript of Optoelectronic Devices (Rahul Raj).pptx


Optoelectronic Devices

BySree RajMani RajAim of PresentationOptoelectronic DevicesCategorization of OptoelectronicsType of Optoelectronic DevicesEmittersLight-Emitting Diodes (LEDs)Laser Diode (LDs)Infrared(IR)Optoelectronic Device meansOptoelectronic Devices: A study and application ofelectronicdevices that source, detect and controllight.Based on thequantum mechanicaleffects oflighton electronic materials.

ElectronicsOptics (Light)OptoelectronicsCategorization of OptoelectronicsDevice that converts electricity into light (Visible or invisible) is called Emitters.Device that convets light into electricity. It include Photoemissive (non-solid state) devices and Photodetectors (Solid-state devices).Optoelectronic DeviceEmittersSensorsIRLaserCouplers or IsolatorsLEDType of Optoelectronic DevicesPhotodetectorsPhotoemissiveEmittersLight-emitting diodes (LEDs)(display, lighting)Laser diodes(data storage, telecommunication,)Infrared(astronomy, communications,)Light-Emitting Diodes (LEDs)Light-Emitting Diodes (LEDs) is a Semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward direction of the p-n juction

ColorWavelength[nm]Voltage drop[V]Infrared> 760V< 1.63Red610