With the advent of optical fiber, the understanding of optical communication technology has been improved. So, today, the Inline Closure manufacturer will discuss how the fiber communicates.
How does optical fiber communication transmit sound and images to distant places? How can you transmit many sounds and images at the same time? There are many similarities and similarities between fiber-optic communications and telecommunications at this stage. When communicating, a sound or image enters the phone or camera to produce a correspondingly varying current or wave. The electric wave enters the transmitting optical transceiver through the exchange multiplexing device so that the light emitted by the light source generates a change corresponding to the electric wave. After the optical fiber is transmitted to the receiving optical transceiver, the receiving optical transceiver "reproduces" the changed electric wave, and enters the corresponding telephone or television through the multiplexing switching device, and then "copy" the sound and the image. In long-distance communication, the repeater should be used to enhance the gradually weakening light in the middle, to avoid the light received by the receiving end is too weak.
How to change the light and electricity in the optical transceiver? In a transmitting optical transceiver, a semiconductor laser and an arc tube are used as a light source, and a varying electric wave is applied thereto, and the luminous intensity thereof can be changed; when a solid laser is used as a light source, a special crystal can be added to make the light Corresponding changes. In the receiving optical transceiver, a well-known photocell can be used to generate a varying electromotive force due to light changes, but it should be a photocell with communication performance requirements.
There are two basic methods for transmitting telecommunication technology in which a plurality of sounds and images are simultaneously transmitted in space or on a pair of conductors: one is a sound or an image of a different communication object, and is transmitted by radio waves of different frequencies, although many different frequencies of radio waves are used. Simultaneous transmission, respectively, can be opened according to the frequency difference at the receiving end. This is called frequency division. The other is to divide the sent electric waves into a plurality of groups in chronological order, and each group respectively transmits sounds or images of different communication objects. In the receiving end, it can be opened separately in chronological order. This is called the time division system. The current phase of fiber-optic communication uses a time-division method to group light in chronological order while delivering many sounds and images.