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White Laser

Le 16 août 2017, 12:10 dans DIY 0

White laser has the advantages of having no traditional laser, and has been applied in many fields. White laser produced a variety of ways, many scientists on white laser technology research has been a strong interest.

Due to the laser generated laser restrictions, resulting in a good laser monochrome characteristics, but it has become a blue laser pointer in the field of application of the short board; laser can not produce any wavelength of the laser, can not produce supercontinuum, ultra-wideband laser The In the field of laser applications, people have different requirements for the frequency (or wavelength) of the laser, and this time with the help of nonlinear crystals. But many bands of laser still can not be created.

At present, nonlinear crystals can produce only a limited range of wavelength laser. The narrow range of the laser, relative to the broad spectrum of white laser, it can carry the energy and information is much smaller than the latter. Therefore, all the coherent, super continuous, ultra-wideband, covered with white spectrum of white laser scientists become the focus of the study. White laser research and development, will also bring the field of laser revolution to revolution and subversion.

red laser pointer

In real life, the most intuitive understanding of white light is red laser pointer display technology and lighting technology, they need to cover all the wavelengths of visible laser - white laser. In addition, according to the laser photon can carry energy and information this feature, white laser than the narrow wavelength range of monochromatic laser more advantages, can be used as optical communication and high power cutting alternative light source.

As the next generation of display technology, laser display is also subject to the scientific and technological community, the business community of common concern. Compared with the traditional display technology, laser display from the high brightness, clarity, color gamut, color saturation, life and other aspects have a leading edge, highly industrial prospects; many Chinese companies have set off a 300mw laser pointer TV hot, related products Has been listed. From the root, white light laser light source research and development, is the fundamental premise of white laser applications.

The laser has a high monochromaticity, and all the optical radiation emitted by the laser is concentrated in a narrower frequency range compared to an ordinary light source. Thus in accordance with common sense, white laser is impossible to issue. However, by adjusting the intensity ratio of red, green and blue tricolor laser, the three primary colors meet, resulting in a white most powerful laser, so that it is impossible to become possible. It can be said that the white laser is the composite light of the entire visible spectrum. At present, there are many ways to produce white laser, but its roots, most of them are inseparable from the traditional laser - red, green and blue three-color laser figure.

In addition to the above methods, photonic crystal fiber white light lasers can also produce high-power, broadband and ultra continuous white light lasers. Its white light laser is mainly used in the field of photocurrent microscopy, nano photonics, fluorescence spectroscopy and imaging, super-resolution imaging, optical coherence tomography and many other fields. The characteristics of traditional laser not with white light 100mw laser pointer, the shortcoming of traditional laser; change and development of white light laser source can bring more fields, and produce new scientific fields, as well as new applications; therefore, it will inevitably become the object of many scientists of the chase.

White Light Laser

Le 7 août 2017, 12:41 dans Couture 0

Laser is the 20th century, following the atomic energy, computer, semiconductor, after another major human invention. The laser has the characteristics of good direction, high brightness, good monochromaticity and so on. Its comprehensive performance is far more than that of traditional sunlight, incandescent lamp, fluorescent lamp, LED lamp and so on. It is a revolutionary way of using light information and energy. Since 1960, when Mayer invented the first laser (ruby lasers), red laser pointer technology has made great progress over the past 50 years and has achieved great success and played an important role in many areas of human society.

The existing laser technology has always been a short board, that is, only a single wavelength or narrow band of light. How to expand the frequency of the laser to form ultra-wideband, super continuous, covering ultraviolet, visible and infrared band of coherent white laser, is still a dream yet to achieve, is a worldwide problem of science and technology. This is because the laser consists of an optical resonator, a gain medium and a pump source. The wavelength of the laser is determined by the energy level structure of the atoms, molecules or ions in the gain material. Since the natural laser crystal material has a large margin in the gain frequency range and the gain bandwidth, the laser pointer can not produce any wavelength laser.

laser pointer

However, due to the dispersion effect of all the nonlinear crystals at present, the phase matching in the nonlinear process can not be automatically satisfied. Under the birefringence matching and quasi-phase matching technique, the frequency conversion range and bandwidth of the nonlinear crystal material still exist Big limitation. In fact, the laser system currently produced by the laser system is far from covering all the bands, many important wavelengths and no corresponding lasers. In addition, the bandwidth of the laser is limited, the best titanium sapphire femtosecond laser can only cover the range of 300nm, and its central wavelength at 800nm. Since laser inventions and nonlinear optics have been born for 50 years, no program can produce true white lasers.

The development of green laser pointer technology is evolving from the early gas lasers (helium-neon lasers), high-power carbon dioxide lasers, excimer lasers, tunable dye lasers, semiconductor lasers, nanosecond and picosecond pulsed lasers to recent fiber lasers and femtosecond (Laser beam quality, pattern diversity, pulse width, peak power, average power, spatial coherence, temporal coherence, etc.) are increasing in all aspects of pulse laser and laser family members. The application of laser technology is becoming more and more extensive, has become an indispensable tool for scientific research, defense, military, lighting, optical fiber communication, information sensing, storage and display, industrial production, biomedicine, environmental testing and so on. The earth is driving these applications to new levels and steps.

However, the existing laser technology has always been a short board, that is, can only issue a single wavelength or narrow band of light. How to expand the frequency of the laser to form ultra-wideband, super continuous, covering ultraviolet, visible and infrared band of coherent white laser, is still a dream yet to achieve, is a worldwide problem of science and technology. This is because the laser consists of an optical resonator, a gain medium and a pump source. The wavelength of the blue laser pointer is determined by the energy level structure of the atoms, molecules or ions in the gain material. Since the natural laser crystal material has a large margin in the gain frequency range and the gain bandwidth, the laser can not produce any wavelength laser.

1961 invented the nonlinear frequency conversion technology (frequency, frequency, frequency difference, parameter amplification, etc.) can be a good quality laser laser light output of a fixed wavelength, through the nonlinear crystal material conversion to the difficult or fundamental It is impossible to directly obtain the wavelength range, therefore, the nonlinear frequency conversion technology is to broaden the laser pen output wavelength of the important means, and non-linear crystal material is the basis of the technology. Nonlinear frequency conversion requires phase matching, in the phase matching conditions, the nonlinear process can get the maximum conversion efficiency. Birefringence matching and quasi-phase matching are two commonly used phase matching techniques, suitable for different laser systems.

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Aidar Burning Laser Weapon System

Le 10 septembre 2016, 11:33 dans Humeurs 0

Aidar Burning Laser Weapon System

The Soviet Union also studied a burning laser weapon in Crimea - a project called Aidar. There was a 50 kW laser weapon deployed in the tanker, aimed at destroying the moving targets above water and air. In contrast, the United States Navy's 30 Kw laser weapon came out at 2014. But Soviet designers still could not solve an important problem: the efficiency of the laser beam.

Another powerful weapon - laser cannon

Star War Laser Pointer Most Powerful

However, this can not be thought as a failure - the 30000mw Laser connon should be used in the vacuum environment of the universe. And the water vapor has consumed most of the laser energy over the surface of Black Sea. It is not easy to launch these large laser device into space. Caused the loss of money in the 80s,the development of laser devices was hard to continue. In addition, the scientists also studied "rowing" and "jet" rail platforms. They intended to put them into space station to launch high orbit anti satellite missiles anti satellite lasers.

For the accumulation of experience, the scientists tested a carbon dioxide 300mw Green Laser weapon which power had come to 1 MW, it was installed in the modified A-60 IL -76 aircraft. However, this laser could only be allowed to be launched after an agreement made by Gorbachev and the United States.Finally,this laser was launched in May 15, 1987.

High powered laser weapon project

The only laser project left is Soviet A60 laser plane. The burning laser was mounted on the top of the door,which could work freely. The side of the fuselage is equipped with a turbine engine that provides energy for the laser cannon.

Laser project eventually thaw in 2009 for the first time. In addition to the space target, A-60 100mw Laser Pointer cannon can destroy aircraft and ballistic missile. In particular, under the anti missile system become common, the development of high powered laser weapons is particularly urgent.

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