I believe everyone is familiar with optical fiber. What we come into contact with most is optical fiber surfing the Internet, and optical fiber is widely used for its absolute advantages. However, many friends will always confuse optical fiber and cable. In fact, they are very different. The following small series will introduce you to what optical fiber is and how optical fiber accesses the Internet.At first, fiber optic pigtail It developed out of control and gradually opened up a sky of its own. https://www.fibercan-network.com/
What is optical fiber?
The full name of optical fiber is optical fiber, which is a light transmission tool based on the principle of total reflection of light in fibers made of glass or plastic. The tiny optical fiber is encapsulated in a plastic sheath, so that it can be bent without breaking.
Generally, the transmitting device at one end of an optical fiber uses a light emitting diode or a laser beam to transmit light pulses to the optical fiber, and the receiving device at the other end of the optical fiber uses a photosensitive element to detect the pulses. Because the transmission loss of light in optical fiber is much lower than that of electricity in wire, optical fiber is often used for long-distance information transmission.
Optical fiber structure: Bare fiber is generally divided into three layers, with a high refractive index glass core in the center, a low refractive index silicon glass cladding in the middle, and a resin coating for reinforcement on the outside.
Numerical aperture: the light incident on the end face of the optical fiber can not be completely transmitted by the optical fiber, but only the incident light within a certain angle range. This angle is called the numerical aperture of the optical fiber. The larger numerical aperture of optical fiber is beneficial to the docking of optical fiber. The numerical aperture of optical fiber produced by different manufacturers is different.