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Regardless of how to calculate, the U.S. military in the technical advantages are in the lead, which is behind the huge investment in technology research and development, which, laser weapon technology is currently a major focus. The purpose is very simple, not only keep the technical field of the first position in the world, but also to other countries but the idea was broken off, the China progress in technology of laser weapons. Laser technology in the early 60s that caused Chinese attention began to begin the research and development of laser weapons, in 80s, it was included in the "863 national high tech research and development program, development today, has made no small achievement.
This system has actually been put into actual combat conditions, which is a leader in the field of 5000mw green laser weapons, other countries before, was only completed a verification test to prove that laser fairly intercept air targets, but do not have into combat conditions. Currently only 10 kilowatts of power, from the intercept has no less than two kilometers, if to raise my performance, such as: the power boost to 30 kilowatts, the effect would be like? If you can intercept distance raised to three kilometers, to raise the height of 1000 m intercept, the target flight speed of 300 m / s, it can replace the combat effectiveness of small caliber antiaircraft artillery and anti-aircraft missile man! "Low-level guards" Although being a civilian, in fact, have the military capability, even in itself reduce the performance of the military model, deliberately limit the number of performance parameters.
Chinese on laser weapon development is strictly confidential and does not disclose any information, only occasionally show some results appear, 2014, laser weapon system China discloses codenamed "low altitude guard", from the public data, the single system defense area of 12 square kilometers, the performance has been quite small caliber level to a height of 500 meters below, the distance is within 2000 meters of the target interception, but its interception rate is very high, at the scene of the demonstration, it shot down the continuous fixed wing and rotor, helicopter and other small aircraft more than 30 sorties, 100% hit rate. The problem is that it is a laser cannon, but also just the Chinese civilian laser cannon, which is called "civil security system" ". Mainly used for dealing with the small UAV, the characteristics of the "low, slow, small" target, namely: low altitude, mostly in the 500 meters; slow flight speed of about 50 m / s in the following; small diameter within 1 meters of the small aircraft.
Weight and volume of the existing system of effective, all devices are integrated into a system of only two small side compartment, if the development of military type, can be larger, mounted directly to the motor chassis, motor development becomes a 3000mw laser pointer defense system or directly on the ship, instead of near Artillery warships. When this system is very advanced, we display the "low-level guards" in 2014, the United States still does not show a similar product, until a year later, it launched 30 kilowatts of "Athena" laser weapons, in the test, it was shot down UAV mile away, and within a few seconds to 5 mm thick steel burn holes.
Fiber laser is a laser cutting machine is the core component, in general, it has played a significant effect on the cutting laser cutting machine. When choosing laser cutting machine, fiber laser customers are very focused brand, even the life of the module integrated manner. Well, today on the high-energy 30000mw laser pointer to tell you about the fiber laser modules.
Fiber laser modules are divided into single-mode and multimode, in cutting applications, a focused spot has a great influence on the cut quality, relatively small core single-mode lasers, beam quality is better than multi-mode, energy distribution Gaussian distribution, the highest energy density in the middle, three-dimensional figure is a sharp mountain-like circle.
Multimode lasers compared to thicker core, single-mode beam quality to be worse compared to the distribution of energy as compared to the average number of single-mode light spot, a three-dimensional image inverted cup from the edge steepness of view, than multimode many steep single-mode.
1mm sheet cutting speed multi-mode single-mode than 20% higher, the visual effect is almost, but 2mm start, the speed advantage of the gradual decline from the beginning of 3mm, both speed and effect, the advantages of high-power multimode green laser pointer speed and effectiveness is very obvious It reflected. So the advantages of single-mode in the sheet, multimode advantages planks, single mode and multimode not mutually comparable value, is a fiber laser configuration, like a car, cars for the road, suitable for cross-country mountain but cars also run mountain, cross country and road run, so choose multimode fiber laser in the end depends on the actual end-user or single-mode processing needs.
So single-mode and multi-mode, how do we choose?
High Energy Laser suggestions: differentiate from the power level, the lasers 1000W or less because of the energy itself is not high, mainly in favor of the sheet processing of material thickness, and therefore within the single-mode 1000mw green laser 1KW configuration is in line with the actual market situation, more than 1KW of power to take into account the laser Bohou. From the entire industry in terms of processing, improve processing quality is a rigid demand, is not compromise, so a lot of high-power single-mode laser selection will not be considered to be the quality assurance process for the first!
At the same time, the single-mode core is generally smaller, which means the same power of the laser light energy transfer in which single-mode core carry more, the material is a challenge, but when cutting highly reflective material, high intensity reflection laser light emitted overlay, if the fiber material is less than the tolerance will be very easy to "burn core", while the core material life is also a challenge! So many laser manufacturers in the high-power fiber 500mw green laserconfigurations still use multimode Configuring!
It is reported that researchers have developed light-based communication tool that can achieve a lot of fast transmission of data in a helical path, and then resolve potential bottlenecks with the growing demand for information sharing brought data transmission. The new technology uses a vortex beam running through the helical path, so that the data is encoded as a swirling twist.
Compared to conventional burning laser pointer, the beam shape so that it has greater freedom in terms of data-encoded optical communication, as compared linear laser transmission, which is the amount of information carried by more than ten times higher. Because of the increasingly powerful silicon chips, the size of today's computer has been scaled down to build the required number has twisted beams, usually by high-capacity optical devices.
One possible method is through the use of a light source and a twist of optical angular momentum can be controlled amount of energy in the internal design of the device structure formation.
In order to produce practical applications for lasers swirl, UB researchers will be scaled down to the vortex laser chip compatible with today's computer used computer. They orbital angular momentum (OAM) in a spiral pattern of distribution of the laser, and proved the ring resonator semiconductor 2000mw green laser can produce single-mode laser OAM swirl, OAM mode can precisely define the topological charge.
The research team said, OAM related laser polarization can be further manipulated according to the needs, in order to form a radial polarization vortex. OAM laser use, especially micro-nanometer laser to address the growing demand for information capacity. The research team OAM micro laser can be used in next-generation optical communications integrated optical devices.
Since the wavelength division multiplexing and time division multiplexing technology is increasingly close to the data transmission limit, or micro-200mw green laser applications will increase the information transmission rate of telecommunications and information technology.
Daily life, a lot of news such as rising oil prices, energy crisis, global climate change will cause us to panic for the future. The current consensus is that we need to reduce dependence on oil in favor of clean energy, avoiding harm to our planet. This view is the people and governments around the world wide support, even in the United States. Scientists in various countries around the world are looking for alternative sources of energy, such as renewable energy sources like wind, biofuels and solar energy.
In mid-century, Bell Labs invented the "Bell of solar cells," but its high cost limited the development of solar cell industry, even after 55 years since then, solar photovoltaic power generation in the global grid accounted for only about 0.04% . However, the situation has changed in recent years, from flat panel display and semiconductor industries burning laser processing technology derived from the solar industry, there has been explosive growth.
Currently there are three common commercial application of solar cell technologies: multi-junction cells, crystalline silicon cells and thin film batteries. Multi-junction cells prepared by application on a single crystal substrate by chemical vapor deposition techniques, has the highest electron conversion efficiency (typically 28-29%, and even up to 40%). As production costs are very expensive, they are typically used regardless of the cost or effective area smaller applications, such as satellite or solar concentrator. Crystalline silicon cells most widely used efficiency monocrystalline or polycrystalline silicon is roughly 13% to 22% range. Thin film battery is a new technology, (8-18%) and low production costs are relatively low efficiency.
Crystalline silicon cells occupy approximately 93% of the PV market. In 2006, solar applications beyond the semiconductor industry, silicon has become the most important application direction (55%), which makes a significant increase in demand for silicon, silicon and caused prices to rise rapidly. So people began to look for alternatives, such as thin-film batteries. Cells are typically made of different multilayer thin film materials deposited on a glass or metal substrate, a common structure as shown in FIG. Most of absorbent material used is amorphous silicon, cadmium telluride (CdTe), copper indium gallium diselenide (CIGS). An outer electrode of the cell is typically made of indium tin oxide (ITO), zinc oxide (ZnO) conductive glass (the TCO), aluminum and molybdenum and other metals. Diode-pumped 30000mw laser pointer commonly used for connecting and insulating portions crossed at different levels.
The first step in the manufacture of thin film battery is on a glass substrate coated with electrodes, this coating is typically ITO (Indium Tin Oxide, light transmissive material). Then P1 scribing process electronic circuits, commonly used Q-switched laser wavelength of 1064 nm and 12-15 W average power. To improve the yield, the laser must be 100 KHz above the high repetition rate for rapid scanning, pulse width should be very narrow (15-40 ns) so that the peak power is higher than the ablation threshold of the material.
To achieve this ideal laser machining process include Spectra-Physics (Spectra-Physics) the Navigator, Hippo or Talon series, currently the world have installed hundreds of sets of such a laser scribing photovoltaic device. Quality spot and pulse stability is also very important to make sure that they are crossed quality, repeatability and reliability of the key. Once the ITO layer is completed, the panel returned to a chemical vapor deposition apparatus, the semiconductor film (amorphous silicon layer).
After the P2 laser process using 532 nm laser scribe from the back of the glass. Similarly, high repetition rate and short pulse width (15-30 ns) is the best, and the process power requirements are not high (typically less than 1W). So you can use a low-power green laser, or a laser beam into a plurality of 4-6 W of simultaneous multiple processing. When the P2 process is complete, the battery back-plate electrode coating (usually aluminum), and finally P3 laser scribing process, which is from the back through the glass substrate, and using the same green laser pointer process and P2. Good quality spot and pulse stability is particularly important to avoid harm to other material layers. P2 and P3 applied to the process of Spectra-Physics Lasers have the Navigator, Hippo and Talon Series green (532 nm).
The biggest advantage over conventional silicon thin film battery cell is full automatic production line, flat panel display equipment coating equipment manufacturer Applied Materials, Oerlikon, Ulvac and Leybold has recognized this opportunity, we began the development of automated production lines. It's the same as the flat panel display market principles to reduce costs by increasing the processing area.
The laser system is an important part of this online automated production lines. As used in the semiconductor and flat panel display, like a laser shine also make solar cell market.
http://www.everyonetobuy.com/best-10000mw-green-handheld-burning-laser-pointer-pen-flashlight.html
