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Overview of Optical Communication
2021/07/07 03:07:00


Optical communication has become an indispensable part of people's daily life since it came out. With the development of optical communication, in order to avoid the failure of optical transceiver due to high temperature during the working process, optical transceiver NTC thermistor chip is generally used as the components of temperature monitoring and temperature controlling.

Optical communication uses optical transceiver for optical-electrical conversion and electrical-optical conversion. In the optical communication system, each device plays its own role to ensure the operation of optical communication:

First, optical transmitter: convert electrical signal into optical signal, mainly composed of signal modulator and optical source.

Second, signal multiplexer: multiple optical carrier signals of different wavelengths are coupled to the same optical fiber for transmission, so as to achieve the effect of doubling the transmission capacity.

Third, optical repeater: in the transmission process, the signal waveform and intensity will deteriorate, therefore, it is necessary to restore the waveform to be as neat as the waveform of original signal

Fourth, signal demultiplexer: decompose the multiplexed signal into the original single signal.

Fifth, optical receiver: the received optical signal is converted into electrical signal, mainly composed of photoelectric detector and demodulator.

Optical communications have been unfailing because of the following advantages:

First, long relay distance, economical and energy saving

If transmit 10 Gbps (10 billion 0 or 1 signals per second) information, using electrical communication requires relay processing every few hundred meters, adjusting the signal. In contrast, the use of optical communication, where the relay distance can reach more than 100 kilometers. The fewer times the signal is adjusted, the lower the cost. On the other hand, fiber optic is made of silicon dioxide, which is abundant and much cheaper than copper wire, so optical communication is economical and energy saving.

Second, fast information transfer, excellent quality communication

The use of optical communication can effectively achieve more smooth communication with overseas. For example, when we talk on the phone or chat online with friends and relatives living abroad, there is no voice lag as in the past. That's due to optical communication, with the help of undersea fiber optic cables, shortens distances and allows information to be transmitted more quickly.

Third, strong anti-jamming ability, good confidentiality

Electrical communication will be prone to errors due to electromagnetic interference, resulting in the deterioration of communication quality. However, optical communication is not affected by electrical noise, so it is safer and more reliable. And because of the total reflection working principle, the signal is completely bound in the optical fiber for transmission, so the confidentiality is good.

Fourth, the transmission capacity is large

The average electrical communication can carry only 10 Gbps (10 billion 0 or 1 per second) amount of information, compare with this, optical communications can carry 1 Tbps (one trillion 0 or 1 single per second) amount of information.

Optical transceiver NTC thermistor chip produced by EXSENSE Electronics Technology Co., Ltd., with characteristics of high precision, rapid response, great stability, etc., which can effectively play the role of temperature monitoring and temperature controlling in the optical transceiver.

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