THE OPTICAL COMPUTER-Presentation.pptx - THE OPTICAL...

THE
OPTICAL
COMPUTER
Ceren Koç
150702022

OPTOELECTRONICS
2

What is
Optoelectronics?
•
In optoelectronics, the conversion of
light and electrical energy is
achieved with the help of a receiver
or transmitter that can interact with
light energy.
• Optoelectronics is a specific
discipline of electronics:
1. Light-Emitting Devices
2. Light-Detecting Devices
3

Main
Devices:
Semiconductor
lasers and detectors
Nonlinear optical
systems
Novel devices
(carbon-based,
plasmonic)
4

Optical Signals
•
Signal selection factors:
-Operating frequency
-Speed
-Environment Characteristic
-Transmission Distance
5

Modulation
The process of changing parameters such as
amplitude, frequency, phase to convert the signal to
photo signal.
The generated signal is not affected by external
effects.
6

Modulation of the
Optical Signal
• Amplitude Modulation
•
Frequency Modulation
•
Phase Modulation
7

Amplitude
Modulation
A type of modulation used in
communication technology
Denoted by AM
The carrier is sine wave in amplitude
modulation.
8

Frequency
Modulation
A type of modulation used in
communication technology.
Denoted by FM
The carrier is sine wave in amplitude
modulation.
9

Phase Modulation
A type of modulation used in
comunication technology
Denoted by PM.
The modulating wave (blue) is modulating the
carrier wave (red), resulting the PM signal (green).
g(t) = π/2 * sin(2*2πt+ π/2*sin(3*2πt))
10

Optical
Elements
Lenses
Reflectors
Refractor
Optical Filters
11

Lenses
•
Used in optical systems to
collect light or focus at a
single point.
•
According to the
wavelength of the light in
the system, lenses made of
glass, quartz or plastic are
selected.
12

There are two type of lens:
Collects light Scatters light
13

Reflectors,
Refractors,
and
Optical
Filters
Reflectors are used to change
the direction or angle of the
incoming beam.