Single-frequency fiber lasers have unique properties such as ultra-narrow linewidth, adjustable frequency, ultra-long coherence length, and ultra-low noise. The FMCW technology on microwave radar can be used for ultra-high-precision coherent detection of ultra-long-distance targets. Change the market's inherent concepts of fiber sensing, lidar and laser ranging, and continue to carry out the revolution in laser applications to the end.
Ultrafast laser is a kind of laser based on SESAM, Kerr lens and other mode-locking technology, the pulse width is in the order of ps or even fs.
When the incident light flux leaves from the illuminated surface or the incident surface of the medium to the other side, the ratio of the radiant energy projected and transmitted through the object to the total radiant energy projected on the object is called the transmittance of the object. The percentage of radiant energy reflected by an object to the total radiant energy is called reflectivity.
Although both spectrum and frequency spectrum are electromagnetic spectrum, due to the difference in frequency, the analysis methods and test instruments of spectrum and frequency spectrum are very different. Some problems are difficult to solve in the optical domain, but it is easier to solve them through frequency conversion to the electrical domain.
Semiconductor lasers are commonly known as laser diodes. They are called semiconductor lasers because of the characteristics of using semiconductor materials as working materials. The semiconductor laser is composed of a fiber-coupled semiconductor laser module, beam combining device, laser energy transmission cable, power supply system, control system and mechanical structure. The laser output is realized under the driving and monitoring of the power supply system and control system.
Laser is a device that can emit laser. According to the working medium, lasers can be divided into four categories: gas lasers, solid lasers, semiconductor lasers and dye lasers. Recently, free electron lasers have been developed. High-power lasers are usually pulsed. Output.
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