Researchers are now using the filaments produced by the picosecond lasers to create a path again through the fog in the lab, which may allow other types of laser beams to pass through the fog and clouds unhindered. This barrier-free access through picosecond lasers in fog or clouds has many potential applications, including free space communications, remote sensing, or more remote changes in local weather. When the filaments produced by the ultrafast 100mw laser pointer pulses pass through the fog, their attenuation is not as much as expected, because when the filament itself is blocked, it absorbs energy from the surrounding photon bath and replenishes the energy in the filament.

Femtosecond lasers produce three to four filaments, which carry about 15% of the total beam energy. The beam is imaged onto a screen and then imaged by an optical filter CCD camera that completely blocks the continuous spectrum of shorter wavelengths generated by the nonlinear optical interaction in the air, but only partially blocks the fundamental frequency The The transmittance of the light through the fog is 0.1% from 100 Hz repetition frequency and 32% at 1000 Hz. At higher transmittance, the entire beam path, not just the path of the 5mw green laser itself, is removed from the fog. The researchers assumed that the energy deposition in the droplets in the laser produces a reduced pressure (0.5 atm) channel and the resulting shock waves in the air, ejecting droplets from the laser and the larger beam path.

UAV has penetrated into various fields, but many places are used in the UAV are multi-rotor, multi-rotor UAV has its own advantages, but sometimes the shortcomings are also obvious, such as small UAV life, Resistance to wind and so on. In order to be able to make small unmanned aerial vehicles can also become the main force in the professional unmanned aerial vehicles, to perform some similar "investigation" task, UAV companies began to look on the bionic machine. The future will be used for urban monitoring, wartime investigation, wounded search and rescue and other military fields, which also includes the installation of lasers in the UAV to eliminate missiles. Laser type dragonfly UAV prototypes will be on display this summer and complete all military deployments by the end of next year.

NASA is working on a long-term technical demonstration of 1mw laser pointer communications that could eventually generate high-speed Internet between terrestrial satellite reception stations and space trajectories or spacecraft on other planets. The connection speed of the network will be far more than the speed of the existing radio frequency. Will use laser communication or photon communication. In this system, the data is encoded into a beam of light. This beam will connect the spacecraft and the antenna on the earth. Data transmission speed will be 10-100 times the existing RF system. Compared with the previous system, the system itself is smaller, lighter, and higher power. Faster speed means that scientists can get test results faster from spacecraft and improve communication between humans and astronauts on the ground. It is vital to conquer the distant stars of mankind.

The laser system will be installed on the orbiting satellites. They will convert solar energy into lasers. This technology is an innovative way of getting power to reduce dependence on hydrocarbon energy. Creating a full-color, updatable stereoscopic display is challenging because three different pixels of three colors must be formed, or three-dimensional pixels can produce stereoscopic graphics. In our display, the microbubble stereo pixel is formed by focusing the femtosecond 50mw green laser pulse in the liquid in three dimensions. The color of this bubble pattern can be colored by changing the color of the illumination light. The technology is still in the prototype stage, but the possible applications include tourist attractions. It can also be used in the military and health care fields to help doctors visualize the patient's body before surgery or learn about terrain and buildings before the soldiers perform their duties.

CO2 lasers are roughly divided into two categories. The first category is heavy industrial work, usually using the output of several kilowatts of power fast flow CO2 laser. Speed ​​is usually more important than cutting quality, so lasers for such applications will use high power, which may sacrifice beam quality, red laser pointer size and cost of ownership. The second category of the market for glass, ceramics, plastics, textiles, wood and other organic materials, precision machining, usually using the power is not higher than 1kW laser to complete. At this point, cutting quality and shape is very critical. Minimizing the size and weight of the entire system is usually a top priority because it keeps low operating costs.

Kommentit (0)

Seuraa 

Blogiarkisto

2017

Kategoriat