Opto electronics devices lacture
Opto electronics devices
Opto electronic devices is the product of technology that combine Optics and Electronics these are branches of physics.
Optics
It is the branch of physics which study the physical aspect of light.
Electronics
The branch of physics which deals with the study of flow and control of elections, there behavior and effect on vacuum, temperature and semiconductor.
Electronics
Sensor devices Emitter devices
SENSOR
These are devices which convert light into electricity.
Sensor
Photo emissive devices photo detector devices
Photo emissive devises
These are devices in which absorption of photon result in emission of electron.
Photo emissive devises
Photo multiplier devices photo emissive devices
Photo multiplier devices
It is a photo emissive device in which current is amplified by electrons multiplication through secondary emission.
It can give current amplification.
It operates at 1 to 5.
Because of their ultraviolet light sensitivity low noice , extremely small current and very fast response time (less than 1).
They are used in securtylatilatav and detector sensitive.
Photo tube or photo detector
These are devices which are used for detection of photon
Photo tube or photo detector
Photo voltaic photo conductive
Photo voltaic
When PN-Junction used without any baise they are made of silicon and silica.
Photo conductive
When PN-Junction is used with a reverse baise it is called photo conductive.
Example: photo diode
They may be either bulb type or junction type.
Bulb type
They are made of single layer of photosensitive material and have no PN-Junction.
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