Shulou(Shulou.com)06/01 Report--

The world is ever-changing, constantly upgrading, survival of the fittest. Today, with heavy traffic and high-rise buildings, optical communication is inseparable from optical communication, which makes information like shape, understand all kinds of things in the world, can pay attention to the state of our lives at any time, and facilitate our conversation. Optical communication has been integrated into our lives, and the days of mail are fading away.

So what is the development process of optical communication?

In the ancient times of our country, there was such an allusion as "the beacon fire of King Zhou you played with princes". The King of Zhou you lit the beacon tower with a smile to win praise. Light the beacon fire to convey the message of the enemy, which is an ancient optical communication equipment. So, the ancient beacon fires, flames and so on can be seen with the naked eye at the beginning of these are the embryonic form of optical communication, the use of light for the most direct transmission.

In 1880, Bell used light wave as carrier to transmit voice, and invented "optical telephone", which can be said to be the beginning of optical communication. After that, for more than 80 years, the exploration of optical communication transmission media was fruitless because of depletion and cost.

In 1951, the loss of medical glass fiber (loss thrown as high as 1000dB/Km) optical glass was too large, which was an important factor restricting the development of optical communication.

Until 1966, Gao Kun, a British Chinese, deeply studied the serious loss of light in quartz glass fiber and found that the main reason for the light loss caused by this kind of glass fiber was that it contained excessive metal ions such as chromium, copper, iron and manganese and other impurities. secondly, when drawing the optical fiber, the core is made by the technology, the interface of the cladding is uneven and the refractive index is not uniform.

Gao Kun proposed that because glass can be made into communication optical fiber attenuated to 20dB/Km, it is called "the father of optical fiber".

In 1970, according to Gao Kun's idea, the American Corning Company first produced the 20dB/Km optical fiber. Although it is only a few meters long and its life is only a few hours, it has proved that how to reduce the optical fiber loss is feasible, which indicates that the actual research conditions of the optical fiber communication system are available, and the development of optical communication has entered a stage of vigorous development. In the same year, Bell Lab successfully developed a semiconductor laser with continuous continuous vibration in greenhouse.

Since the early 1980s, single-mode fiber and quantum well lasers have been developed.

In the 85-90's, single-mode fiber was used as channel and single-mode laser as transmitter.

After the mid-1990s, the advent of EDFA and DFB and the development of single-mode low-loss fiber are its landmark achievements.

The greatest achievement at this stage of the 21st century is the commercialization of DWDM and DFB.

So what will our future be achievable?

Optical fiber communication is becoming more and more horizontal, and the use of optical fiber is inseparable from optical modules. Easy Tianguang Communication ETU-LINK is a professional optical module manufacturer, which can provide a variety of high-performance, high-quality and high-speed optical modules. there are also many mainstream optical module manufacturers on the market, thank you!

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