Fiber Optics
Fiber Optics
History of Fiber Optics
History Of Fiber Optics
In 1870, John Tyndall, using a jet of water that flowed from one container to another and a beam of light, demonstrated that light used internal reflection to follow a specific path.
• Alexander Graham Bell patented an optical telephone system, which he called the Photophone
• He dreamed of sending signals through the air, but the atmosphere didn't transmit light as reliably as wires carried electricity.
• During the 1920s, John Logie Baird in England and Clarence W. Hansell in the United States patented the idea of using arrays of hollow pipes or transparent rods to transmit images for television or facsimile systems. • In 1954s, Abraham Van Heel made the crucial innovation of cladding fiber-optic cables • Abraham Van Heel covered a bare fiber or glass or plastic with a transparent cladding of lower refractive index.
• Corning Glass researchers Robert
Maurer, Donald Keck, and Peter
Schultz invented fiber-optic wire or
"optical waveguide fibers
• In April 1977, General Telephone and Electronics tested and deployed the world's first live telephone traffic through a fiber-optic system running at 6 Mbps, in Long Beach,
California.
• Today more than 80 percent of the world's long-distance voice and data traffic is carried over optical-fiber cables. What are Fiber Optics?
What are Fiber Optics?
Core - Thin glass center of the fiber where the light travels Cladding - Outer optical material surrounding the core that reflects the light back into the core
Buffer coating - Plastic coating that protects the fiber from damage and moisture Optical fibers come in two/three types: Single-mode fibers
All signals travel straight down the middle without bouncing off the edges (red line in diagram).
Eg. Cable TV, Internet, and telephone signals.
Multi-mode fibers
10 times bigger than one in a single-mode cable.
Transmit infrared light
(wavelength = 850 to 1,300 nm) from light-emitting
History of Fiber Optics
History Of Fiber Optics
In 1870, John Tyndall, using a jet of water that flowed from one container to another and a beam of light, demonstrated that light used internal reflection to follow a specific path.
• Alexander Graham Bell patented an optical telephone system, which he called the Photophone
• He dreamed of sending signals through the air, but the atmosphere didn't transmit light as reliably as wires carried electricity.
• During the 1920s, John Logie Baird in England and Clarence W. Hansell in the United States patented the idea of using arrays of hollow pipes or transparent rods to transmit images for television or facsimile systems. • In 1954s, Abraham Van Heel made the crucial innovation of cladding fiber-optic cables • Abraham Van Heel covered a bare fiber or glass or plastic with a transparent cladding of lower refractive index.
• Corning Glass researchers Robert
Maurer, Donald Keck, and Peter
Schultz invented fiber-optic wire or
"optical waveguide fibers
• In April 1977, General Telephone and Electronics tested and deployed the world's first live telephone traffic through a fiber-optic system running at 6 Mbps, in Long Beach,
California.
• Today more than 80 percent of the world's long-distance voice and data traffic is carried over optical-fiber cables. What are Fiber Optics?
What are Fiber Optics?
Core - Thin glass center of the fiber where the light travels Cladding - Outer optical material surrounding the core that reflects the light back into the core
Buffer coating - Plastic coating that protects the fiber from damage and moisture Optical fibers come in two/three types: Single-mode fibers
All signals travel straight down the middle without bouncing off the edges (red line in diagram).
Eg. Cable TV, Internet, and telephone signals.
Multi-mode fibers
10 times bigger than one in a single-mode cable.
Transmit infrared light
(wavelength = 850 to 1,300 nm) from light-emitting