What is the difference between microwave transmission and laser communication in wireless transmission systems?

Every time a customer has a lot of people ask, what is the wireless bridge transmission, we will explain that it is transmitted through the microwave. So what is microwave? Nowadays, there are also many words like laser communication. What is laser communication? What is the difference between the two?

First, the difference between transmission media

Microwave communications are transmitted using microwaves, and so-called microwaves are electromagnetic waves. Electromagnetic waves with frequencies between 300 MHz and 300 GHz are microwaves. Laser transmission is carried out by laser. Laser is a type of light wave, but it also has electromagnetic wave characteristics.

Second, the frequency difference

The frequency of the laser is up to several hundred million megapixels, which is more than 100,000 times the microwave frequency. However, since the frequency of the laser light is too large, the wavelength of the laser light is very short, so the laser light has less fluctuation than the microwave.

Third, the application of the difference

General microwave transmission is used in common common transmission systems, like ordinary wireless monitoring systems. Because the laser has the unique duality (wave and particle properties) of light waves, it has attracted much attention in communications industries such as military communications, where encryption requirements are high. In some special environments or in environments with high confidentiality requirements, lasers are more appropriate.

Fourth, the price difference

There is no doubt that laser equipment is more expensive than microwave equipment. In the case of civilian and commercial use, the use of microwave transmission equipment is more cost-effective.

Fourth, the difference in working principle

The working principle of laser communication and microwave communication is almost the same. First, it will be emitted by the transmitter as a carrier laser, modulated by the modulator, sent to the receiver at the back end, and then decoded by the receiver's decoder. The difference between the two is that laser communication uses laser as a carrier, while microwave communication uses microwave as an information carrier.

Fifth, the different application environment

Lasers and microwaves can be divided into wired and wireless transmissions. Cables can be transmitted over optical fibers, while wireless transmissions can be through air. However, lasers can also be transmitted underwater, while microwaves cannot.

Microwave transmission is more susceptible to interference than laser transmission, but as long as the environment is located without too many interference sources, microwave transmission will not make much difference. In addition, laser transmission is a straight line transmission, and microwave transmission can be transmitted by diffraction. Therefore, microwave transmission has a wider application environment than laser transmission.

Of course, the above is only a general description, and more can be linked to Lean Technology to answer your questions.