What is optical fiber?
The simplicity of using fiber optic communications may seem attractive. However, the testing of fiber optic cables requires understanding some basic principles that differentiate them from the testing of analog cables that preceded them.
An optical fiber consists of a very fine glass wire, surrounded by a protective plastic envelope. The light, injected into the heart of the fiberglass, follows the physical path of this fiber because of its total internal refraction between the heart and the sheath.
The three components of an optical fiber
Optical fiber is made up of:
Core: the center of the fiber optic cable, made of specially treated glass or plastic. It is used to transmit light over the entire length of the cable and must, therefore, be as pure and clean as possible.
Sheath: an additional layer, made of a material similar to that of the heart, but with a lower refractive index to facilitate continuous refraction from the light source to the heart.
Coating: the outer layer of the cable which envelopes, protects and insulates the core and the sheath.
Types of optical fiber
Optical fiber is classified into different types (multimode or single-mode) depending on how it allows light to move. The type of fiber is closely related to the diameter of the core and the sheath.
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Multimode fiber offers several advantages, mainly the lower cost of transmitters and receivers and the simplicity of coupling to them. However, its relatively high attenuation (optical loss) and its low bandwidth limit the transmission to short distances.
The simplicity of using fiber optic communications may seem attractive. However, the testing of fiber optic cables requires understanding some basic principles that differentiate them from the testing of analog cables that preceded them.
An optical fiber consists of a very fine glass wire, surrounded by a protective plastic envelope. The light, injected into the heart of the fiberglass, follows the physical path of this fiber because of its total internal refraction between the heart and the sheath.
The three components of an optical fiber
Optical fiber is made up of:
Core: the center of the fiber optic cable, made of specially treated glass or plastic. It is used to transmit light over the entire length of the cable and must, therefore, be as pure and clean as possible.
Sheath: an additional layer, made of a material similar to that of the heart, but with a lower refractive index to facilitate continuous refraction from the light source to the heart.
Coating: the outer layer of the cable which envelopes, protects and insulates the core and the sheath.
Types of optical fiber
Optical fiber is classified into different types (multimode or single-mode) depending on how it allows light to move. The type of fiber is closely related to the diameter of the core and the sheath.
google fiber technician salary
Multimode fiber offers several advantages, mainly the lower cost of transmitters and receivers and the simplicity of coupling to them. However, its relatively high attenuation (optical loss) and its low bandwidth limit the transmission to short distances.
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