The quality group of laser pointer is in charge of the quality

The quality group of laser pointer is in charge of the quality assurance of laser pointer .
Semiconductor lasers work material is a semiconductor, semiconductor laser materials as there are dozens of species, is commonly used in medicine gallium arsenide, aluminum gallium arsenide. Liquid lasers mainly refers to the organic liquid lasers, commonly used dye laser output wavelength continuously adjustable (by changing the work material composition, concentration and other methods), work material and more (there are over one hundred kinds of dyes has been stimulated emission), and can be continuous or high-repetition-frequency oscillation, so the use of a wide range. Medical laser beam diameter is typically tens to hundreds of microns, so the general multi-mode fiber. Diameter of the laser beam to a small condenser, the optical power density is too high will cause material damage. Because of this limitation, and often can not use fine fiber. Practical, the most widely used is quartz glass fiber, as shown in Figure 20 the minimum loss near 1μm, suitable for Nd: YAG laser and other near-infrared laser transmission. At present, this equipment will be installed in the underwater platform, used to detect and identify mines, especially the use of other means is difficult to sink to the bottom mine detection reports. As in the U.S. Navy's "Dolphin" class submarines simultaneously test multiple times SM2000 underwater blue-green laser line scanner, the test confirmed it than any other underwater imaging system performance is much higher.In this way, communication, submarine can not surface in the deeper water depth or cruise using the receiver on its own shell Collecting message, did not affect the submarine and is not going to expose. The innovative concept of laser pointer is adopted by the customer.
In addition, the use of blue-green laser communication also has a high data transfer rates, excellent privacy, anti-interference ability and duplex communication. U.S. Navy from 1977 made satellite - the feasibility of submarine communications, research on long-term plan with the U.S. Bureau of Defense began the implementation of joint strategic laser communications program. From 1980 onwards, almost every two years to the frequency, for a total of 6 times so far offshore large blue-green laser submarine communication experiments. The information process of laser pointer will be implemented by the information management department.
These tests include the success of the 12 km altitude on the water 300 meters deep sea submarine laser communications experiment simplex, and the higher the sky, long endurance unmanned aircraft and the simulation time to the normal dive depth and speed of navigation duplex between the submarine laser communication feasibility test confirmed the blue-green laser communication in the weather is not normal, heavy rain, muddy water under harsh conditions such as normal.