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The first time does not join the gravitational waves, after the same time, the two beams of light return, and in the spectroscope to re-meet, resulting in interference. This time by adjusting the X, Y arm length, control the two beams are canceled, then the photodiode no optical signal. After the second test to join the gravitational wave, the gravitational waves from the direction perpendicular to the ceiling into the arms of the arm will be stretched, the other arm compression is short, so that the two light optical path difference has changed, the original coherent The conditions of destruction are destroyed, a certain amount of light will enter the detector, get the gravitational wave signal. The advantage of the most powerful laser interferometer for the resonant bar is obvious: First, the laser interferometer can detect a range of frequency of the gravitational wave signal is generally 20Hz-3000Hz; Second, the laser interferometer arm length can be done very long, such as ground gravity wave interference The arm length of the instrument is generally in the order of 1000 meters, far more than the length of the magnets of the magnets, so that the gravitational waves will be displayed through the photodetector.

At present, when it comes to automatic vehicle environment awareness technology, many people will first think of lidar. Indeed, compared to on-board sensors such as cameras and millimeter wave radars, lidar has the advantages of high accuracy and high resolution, and has been widely deployed on many automatic test vehicles. But this technology also has its disadvantages: high cost can not be ignored, such as the Ibeo LUX 4 line blue laser radar, the price as high as $15 thousand, while Google announced that although at the beginning of its independent development of the laser radar can reduce the cost of 90%, each still $7500. Such a high price is clearly unrealistic for an eventual self driving car.

Therefore, how to find a lower cost environment aware solution has become the concern of many enterprises. Comparatively speaking, the vision navigation technology with "camera + software" is easier to achieve. Visual navigation, as the name suggests is through the visual camera to capture image information, to obtain the position and direction of moving objects in space and other environmental information, and the information obtained is dealt with by a certain algorithm, the environment model, and find an optimal or near optimal collision free path, to achieve safe movement to reach the destination.

Ultra-high-speed imaging technology provides researchers with the best view of the atomic world. Molecules and atoms in the space beating, spinning, seems to be dancing in the serious dance, they continue to twist until a molecular chain is broken, while the other happens to "click" card in place. From the theory of molecular structure so far, chemists use this imagination method has been more than 150 years. Now, these imaginations will become reality. Researchers use a series of techniques in the lab for the "director film" of the molecule.

The team uses a string of 40 fs long X-ray pulses for initial burning laser pointer bombardment, resulting in a diffraction pattern showing the atomic position. These diffraction patterns were made into a "film" and found that about 550 fs of laser light was stimulated by the sensitized yellow protein, and the isomeric phenomenon occurred. "This is a huge surprise because it does not exist only in the moment," says Petra Fromme, a biochemist at the University of Arizona, a member of the research team. "This completely changed our perception of this response."

The all-optical program to achieve particle acceleration has attracted a lot of attention in the past two decades with its potential advantage in dramatically reducing the scale and cost of accelerators. The plasma generated by the laser can maintain a very high acceleration gradient, whereby efficient acceleration of the charged particles can be achieved. In particular, in recent years, the use of tail wave field technology to achieve electronic acceleration has made important progress, the resulting particle beam quality and traditional accelerator produced can be compared. Efforts to accelerate laser-driven ion acceleration are also currently being experimentally achieved by the so-called sheath-field acceleration mechanism: the potential gradient in the sheath field causes the ions emitted from the surface of the 30mw laser pointer irradiated foil to be accelerated. The ion beam produced by this mechanism has some unique properties, but there are some limitations in terms of energy spectrum, dispersion and divergence angle, which seriously hinders their practical application.

Fiber laser development so far, high anti-material processing has been limited to the application of fiber lasers a major pain point. Especially gold and silver copper and other metal materials, low absorption rate, laser processing will produce a lot of reflected light. These reflected light, or cause fiber laser protection to shut down to cause waste, or directly damage the fiber 1mw laser pointer. QCW fiber laser due to its 5-10 times the peak power of traditional continuous lasers, you can instantly ionize the high anti-material, increase the absorption rate, reduce the reflection, with some high-reflective material processing. However, QCW fiber lasers only 1 / 10-1 / 5 of the average power of conventional CW fiber lasers, resulting in slow processing speed and expensive lasers. And the current QCW fiber laser on the ultra-high reflectivity of sterling silver can not guarantee a high yield.

Ultra-narrow linewidth lasers are used not only for atomic clocks but also for certain types of spectroscopy, coherent optical communications, and interferometric sensors. In addition to wavelength stability, phase noise is also important for these lasers. Phase noise is the deviation of the time-varying electric field of the 50mw green laser beam from the pure sine wave. In addition, the presence of phase noise limits the resolution of the system used by the laser; and the phase noise of this ultra-precision laser is difficult to measure.

Metal is a shiny, ductile material, therefore, most of the metal can be made beautiful, exquisite handicrafts or jewelry, such as gold rings, silver necklaces, iron products and so on. The starting absorbance of the metal pair of 10.6 μm brightest laser pointer beam is only 0.5% to 10%. However, when a focused laser beam having a power density exceeding 106 w / cm2 is irradiated onto the metal surface, it can be made in a microsecond time The surface begins to melt. The absorption rate of most metals in the molten state rises sharply, generally by 60% to 80%.

Today, with the change of economic environment, laser cutting machine market demand, between the various brands, manufacturers of the competition has been white hot. In this regard, we can feel a new project of laser cutting machine needs less, fewer people buy inquiry, the equipment is difficult, payment period, customers are not so straightforward and generous, "began to carp...... These are the "business" is not good in performance, if such "a pile of messy performance carry out to solve, it will make people confused. However, if the current 10000mw laser pointer cutting machine industry competition is summed up, it can be attributed mainly to the brand, price and channel, and the several aspects of the service competition.

Laser cutting machine brand differentiation is the core advantage or personality differences products into the brand, to meet the individual needs of target customers. The success of the laser cutting machine brand has a different characteristic, are different from competitors, then in a form consistent from beginning to end brand differentiation and customer psychological needs connected by way of brand positioning accurate information to convey to the market, to occupy a favorable position in the minds of potential customers. The purpose is to create and develop certain characteristics for their laser cutting machine products, distinctive personality, establish a unique image of the market, which is different from competitors, and effectively determine the products in the minds of customers in the neutral position. In laser cutting machine enterprises and products more and more homogenization tendency, more and more similar products, competition is increasingly fierce, in order to break through, the enterprise must according to the selection strategy for brand positioning of their actual needs, find the appropriate market position for their own enterprises and products.

As a young subject, laser technology has brought about great changes in human science and technology, production and life. Whether in processing, scientific research, biology, cutting-edge technology and other fields, has a very large application space, and therefore sustained by domestic and foreign enterprises and research institutions attention, technology development. Since 2016, laser technology has also made a series of major breakthroughs, the following inventory ten annual burning laser pointer technology progress.

Photon impact heating of nanoparticles was observed for the first time

Lucas Nowotny of ETH Zurich, Switzerland, led the research team, for the first time measured the photon and micro particles collision when the micro "shock" warming effect. The team used laser to limit the radius of about 50nm silica nanoparticles in the optical trap, the optical trap environment is a super vacuum chamber. The researchers used a method called feedback cooling process, which capture the particle's position is monitored, and the trap frequency accordingly modulation, pulling away particle energy and reduce the temperature of the particle to the micro level of Kelvin. In ambient pressure greater than 10e9, the minimum temperature of the particle temperature is determined by pressure. Under 10e9, no matter how much pressure, the minimum temperature does not change with pressure. This means that, at very low pressures, the dominant limiting cooling factor is the electromagnetic noise in the trap.

Over the past year, including the laser display, VR / AR, 3D holography, and other cutting-edge intelligent display technology in the multimedia audio-visual applications have high-light performance. 2016 is considered to be the first year of laser display, in the audio-visual industry is also homeopathic blowing a laser display cyclone. From the exhibition display to the conference center, from the command center to the stage performing arts, from home to theaters show ... ... the industry as the fourth generation of display technology, high power laser pointer display technology, application development momentum has been overshadowed LED, OLED.

Up to now, the laser display light source has three primary colors of pure laser, phosphor laser, laser hybrid light source (laser and LED hybrid) three categories, each light source has its own advantages and disadvantages. Contrast, the three primary colors of pure laser advantage is more obvious. Three-color laser is regarded as the most orthodox laser light source. It has the advantages of wide color gamut, high luminous efficiency, long life, low power consumption, good consistency, stable color temperature, safe and reliable maintenance-free and flexible application.