24-02-2011, 04:03 PM
presented by:
Sachidananda Panda
[attachment=9101]
Optical Computing Technology
Introduction
“Optical computing is the science of making computing work better using optics and related technologies”
Some researchers use “optoelectronic computing”
Why Do We Need Optical Computers?
Rapid growth of the Internet
Network speeds currently limited by electronic circuits
Terabit speeds are required
Traditional silicon circuits have a physical limit
Types of Optical Computer
Optical Analog
These include 2-D Fourier transform or optical correlators, and optical
matrix-vector processors.
Optoelectronics
In this type of computing device would be to shorten the pulse delay
in chips and other logic elements by using optical interconnections.
Optical parallel digital computers
These would use the inherent parallelism of optical devices along with digital electronics for flexibility.
Optical neural computer
Neural computers compute in the sense that they have streams of input and output bits. They do not require anything resembling ordinary programming; if programming is done at all it is by dynamically changing the degree to which the individual nodes are connected.
MATERIALS FOR OPTICAL COMPUTER
Materials belong to the classes of phthalocyanines and polydiacetylenes. are used.
Phthalocyanines are large ring-structured porophyrins for which large and ultrafast nonlinearities have been observed. These compounds exhibit strong electronic transitions in the visible region and have high chemical and thermal stability up to 400C.
Subsequently, polydiacetylenes are among the most widely investigated class of polymers for nonlinear optical applications. Their subpicosecond time response to laser signals makes them candidates for high-speed optoelectronics and information processing
A comparison of a scanning electron micrographs of 1 mm thick films of copperphthalocyanine deposited by physical vapor transport in the 3M PVTOS flight (STS-20) and ground control experiments
A comparison of a ground-grown polydiacetylene film with a microgravity-grown one.
How Does It Work?
Photonic circuits
Organic compounds
No short-circuiting possible
No heat dissipation
Speed of light in photonic circuits will be close to speed of light in vacuum
Light beams can travel in parallel
They can transfer data in parallel.
Sachidananda Panda
[attachment=9101]
Optical Computing Technology
Introduction
“Optical computing is the science of making computing work better using optics and related technologies”
Some researchers use “optoelectronic computing”
Why Do We Need Optical Computers?
Rapid growth of the Internet
Network speeds currently limited by electronic circuits
Terabit speeds are required
Traditional silicon circuits have a physical limit
Types of Optical Computer
Optical Analog
These include 2-D Fourier transform or optical correlators, and optical
matrix-vector processors.
Optoelectronics
In this type of computing device would be to shorten the pulse delay
in chips and other logic elements by using optical interconnections.
Optical parallel digital computers
These would use the inherent parallelism of optical devices along with digital electronics for flexibility.
Optical neural computer
Neural computers compute in the sense that they have streams of input and output bits. They do not require anything resembling ordinary programming; if programming is done at all it is by dynamically changing the degree to which the individual nodes are connected.
MATERIALS FOR OPTICAL COMPUTER
Materials belong to the classes of phthalocyanines and polydiacetylenes. are used.
Phthalocyanines are large ring-structured porophyrins for which large and ultrafast nonlinearities have been observed. These compounds exhibit strong electronic transitions in the visible region and have high chemical and thermal stability up to 400C.
Subsequently, polydiacetylenes are among the most widely investigated class of polymers for nonlinear optical applications. Their subpicosecond time response to laser signals makes them candidates for high-speed optoelectronics and information processing
A comparison of a scanning electron micrographs of 1 mm thick films of copperphthalocyanine deposited by physical vapor transport in the 3M PVTOS flight (STS-20) and ground control experiments
A comparison of a ground-grown polydiacetylene film with a microgravity-grown one.
How Does It Work?
Photonic circuits
Organic compounds
No short-circuiting possible
No heat dissipation
Speed of light in photonic circuits will be close to speed of light in vacuum
Light beams can travel in parallel
They can transfer data in parallel.
