The battery will be presented as a gift with usa green laser pointer

Later, the American physicist Charles Townes and the Soviet physicist of Masuo Fu, and the general Huoluo Fu has proposed the use of atoms and molecules stimulated radiation principle for generation and amplification of microwave design. In 1954, the previously mentioned American physicist Townes finally made the first ammonia molecular beam maser, successfully pioneered the use of molecular and atomic systems as the precedent of the microwave radiation coherent amplifier or oscillator. Townes, who developed the maser produced only 1.25 cm wavelength of the microwave power is very small. Production and continuous development of the need to promote science to explore new fluorescence mechanism, to produce new high performance light source.  green laser pointer    has the traditional function like the laser pens.
In 1958, Townes and sister Fu Ese Xiaoluo maser and optical spectroscopy of theoretical knowledge combined, the key recommendations of the open cavity and prevent the coherence of the laser direction , line width, and noise properties. During the same period, Basov and general Huoluo Fu, who also made the realization of the principle scheme of the optical amplification by stimulated emission of radiation. The advent of the laser. Research Laboratory in Miami, Florida 1960, American physicist Theodore Maiman, barely won the worldwide development of competition. He used a high-strength flash tube to stimulate the chromium atoms in the ruby crystal, resulting in a considerable concentration of the thin red beam of light, when it fired at a certain point, can it reach the high temperatures than the sun. The carton of   green laser pointer    should be in the right place.
In December 1960, the Iranian-born American scientist Jia Wan rate finally succeeded in creating and running the world's first gas laser - He-Ne laser. In 1962, three groups of scientists almost simultaneously invented the semiconductor laser. In 1966, scientists have developed has become an organic dye laser wavelength can be continuously adjustable over the range. In addition, the output energy, high power, and not dependent on the grid of chemical lasers have come out. The latest developments of the laser. For example: the free-electron lasers, excimer lasers, and so on have been invented. Free electron laser: April 1977 Stanford University Deacon and other personnel for the development of the first free-electron laser oscillator. The body of this kind of    green laser pointer     is firm enough.
By a pumped into the vacuum of 5.2 m long copper tube composed of outside around the superconducting wire in order to transverse static magnetic field changes in a cycle of 3.2 cm throughout the pipe axis magnetic induction intensity B_0 0.24 Waters pull. Brass ends with mirrors form a resonant cavity, the cavity length of 12.7 meters, the output mirror reflectivity of 1.5% energy spread is less than 3 \ times10 ^ {-3} 43.5 MeV electron beam from a superconducting accelerator. Excimer laser: the first excimer laser was born in 1970, which uses the strong electron beam excitation of liquid xenon, xenon excimer lasing effect, the laser wavelength of 1720 Angstroms. The battery will be presented as a gift with     usa green laser pointer  .
Subsequently, the gas xenon molecules, as well as other rare-gas excimer, rare gas-oxide excimer (oxidation krypton, xenon oxide, oxide, argon, etc.), metal vapor - rare gas excimer (xenon sodium, etc.); rare gases single tooth compounds quasi molecules (XeF, argon fluoride, krypton fluoride, chloride, xenon, xenon bromide, iodide, xenon chloride, krypton, etc.), metal gear compounds excimer (mercuric chloride, bromide of mercury, etc.) and metal quasi- molecules (sodium excimer) was born one after another. Excimer laser material has a lower state of exclusion, it can be effectively taking the time, so the low-state absorption and energy loss. The blue ray    green laser pointer     must be very expensive.