Photonics
Photonics
What is Optoelectronics /Photonics
Is there any Difference ?
Optoelectronics:
Any device that operates as an
electrical-to-optical or electrical-to-optical-to-electrical transducer.
Photonics:
Why Do We Need Photonics instead of
Electronics?
An “All - Pervasive” Technology
1)
Uninhibited light travels thousands of times faster than
electrons in computer chips. Optical computers will
compute thousand of times faster than any electronic
computer can ever achieve due to the physical limitation
differences between light and electricity.
2)
Can packed more wavelengths (that is information
channels) into a optical fibre so that the transmission
bandwidth is increased than conventional copper wires.
3)
Light encounters no electromagnetic interference than
What is a photonic transistor?
• A transistor is a switch that is turned on and
off by signals from other switches. They
perform logic, store information and are the
work horses of digital computing. Photonic
transistors use light to perform the switching
functions that are performed by electronic
OPTOELECTRONICS application
Displays.
Display:
alarm clock, TV and video recorder,
microwave cooker and some ovens.
Liquid crystal displays
watches, calculators, telephones,
portable radios, tape and CD players
office machines such as faxes and copiers.
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Communications.
A phone call outside local area
To link computers,
outside broadcast TV cameras,
Banks, Stock Exchange dealing rooms, etc.
Cameras.
Camcorders and Digital still cameras
depend on a high quality multi- component optical lens.
Entertainment.
TV remote controller
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Manufacturing.
Lasers are being used for cutting and welding .
Clothes made in large quantity are cut to shape using
a laser.
The gears in car have probably been welded to the
shaft using a laser.
The symbols all over the dashboard have been
CAREERS INVOLVING
OPTOELECTRONICS
• Optoelectronics Engineer .
• Biological Researcher and Technician
– uses microscopes with video camera attachment . • Civil Engineer
– uses a laser beam with a theodelite to create a straight line over long distances to measure the angle of a proposed road bridge from a reference position.
• Auto focus camera lens designer
– uses computer programs to design the lens, the sensors and electronics to measure the sharpness of the image to control the focus, and CAD (Computer Aided Design) to design the
components and housings. • Heating Engineer
– uses a Thermal Imaging camera to give a high quality picture showing the temperature distribution across a scene.
• Communications System Installer
– couples optical fibers to electronic systems to route the
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• Conservation Specialist– uses laser beams to blast away the grime that has built up on buildings and statues
• Environmental Inspector
– uses a laser beam projected into the smoke plume from a factory to monitor the levels of the different gases emitted .
• Quality Control Inspector
– uses apparatus which measures the precise color spectrum of the food product .
• Surgeon
– uses a slip-on device over the patients thumb which monitors an infra-red beam to continuously measure the pulse rate. Also inserts a fiber optic endoscope into the patient with a camera attached. • Skilled Machinist
– uses various types of laser beam under computer control e.g. to cut holes finer than a human hair,
Technology - SCOPE
Light wave communications
Consumer Photonics
Optoelectronics Devices & System
Overview
System Structure
Optoelectronic Components
Optoelectronics in
Optical Communication System
•
Next figure “Network Example” shows
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Substrate Material: Waveguide
Assembly processes are being evaluated to couple the
signal from the waveguide to an active optical
component.
Waveguides in PWB Technology
