The green ray green laser pointer is the focus of the discussion

Cavity wavelength scale in the order of the laser. It has low thresholds and high conversion efficiency, high-speed modulation characteristics. Currently, its main structure, the form of vertical-cavity surface-emitting lasers and micro-disk lasers. Vertical-cavity surface-emitting lasers in general is highly reflective multilayer dielectric film as the flat mirrors, the laser emitted perpendicular to the surface mirrors; microdisk lasers is to use the curved interface of total internal reflection limits the formation of cavities, as in whispering gallery mode the main resonant mode. In 1988, Japan's Tokyo Institute of Iga (Iga), who successfully developed a vertical-cavity surface-emitting lasers; 1992 U.S. AT & T's McCaw (McCall), who successfully developed the liquid nitrogen temperature optically pumped InGaAs / InGaAsP microdisk lasers. The accurate parameter of green laser pointer is the main information which should be provided to the customer.
Micro-cavity laser because of its small size, light-emitting material for cavity quantum confinement produced, which appeared in a series of cavity quantum electrodynamics (large QED) effects. Of cavity quantum electrodynamics theory provides a stage show. This laser than conventional semiconductor lasers has obvious advantages in optical integration, optical interconnects, optical neural networks, and optical communications have a wide range of applications. To work with the excimer gas laser material of a class of devices. Used relativistic electron beam (energy greater than 200 keV) or horizontal discharge to achieve rapid pulse excitation. When the excited state excimer unstable molecules bond breaking and dissociation into ground state atoms, excited-state energy of laser radiation in the form of release. The accurate parameter of green laser pointer has been checked and inspected for many times.
The first was born in 1970 excimer laser, which uses strong electron beam excitation of liquid xenon, xenon excimer lasing get the role, the laser wavelength of 1720 angstroms. Subsequently, the gas xenon excimer molecules and other rare gases, rare gas-oxide excimer (oxidation krypton, xenon oxide, oxidation argon, etc.), metal vapor - noble gas excimer (xenon sodium, etc.); rare gas compounds quasi-single-tooth molecules (fluorinated xenon, argon fluoride, krypton fluoride, xenon chloride, bromide, xenon, xenon iodide, chloride, krypton, etc.), metal gear excimer compounds (mercuric chloride, bromide, mercury, etc.) and quasi-metal molecules (sodium excimer, etc.) gradually born. Excimer laser material with a lower state of exclusion, it can be effective in taking the time, so no low-state absorption and energy loss, inversion is very easy to gain a large, high conversion efficiency, repetition rate, the radiation wave length. The customer speaks highly of the accurate parameter of green laser pointer.
Mainly in the ultraviolet and vacuum ultraviolet (extended to the visible minority) area oscillation, wide tuning range. It isotope separation, UV chemistry, laser spectroscopy, fast photography, high-resolution holography, laser weapons, material structure, optical communications, remote sensing, integrated optics, nonlinear optics, agriculture, medicine, biology, and pump tunable dye lasers, etc. have been more widely used, and is expected to develop into the laser for nuclear fusion devices. In the medical field using laser types are more commonly used in ophthalmic treatment are ruby (rudy) laser, argon ions (Ar +) laser, krypton (Kr +), dye (dye) laser, neodymium-doped yttrium aluminum garnet ( Nd: YAG) laser and argon fluoride (ArF) excimer laser and other solid, gas and liquid lasers, with continuous, pulsed and Q-switched mode, the bottom of the eye treatment refractive pigment membrane and other parts of the number of ten kinds of related eye diseases. The customer thinks that the parameter of green laser pointer can be more accurate.
Excimer laser used in ophthalmology, is argon (Argon) and fluorine gas (Fluoride) of working gas produced by the laser. The so-called excimer laser, is excited dimer (inert gas and halogen two elements) generated by the laser, the wavelength range of 157 ~ 353nm, respective UV laser band. Now for the clinical argon fluoride (ArF) produced a mixture of extreme-ultraviolet wavelength of 193nm cold laser. The wavelength of 193nm ArF excimer laser for refractive surgery is the mechanism of photochemical effects. Excimer laser single photon energy is about 6.4eV, and corneal tissue in the peptide bond and the combination of carbon molecules bond energy of only 3.6eV. When the high-energy photon radiation to the cornea, directly break molecular bonds within the organization, leading to fragmentation and to achieve ablation of corneal tissue cut the organization's purpose, and because the excimer laser pulse is short (10 ~ 20nm), but also photochemical effect removal. The company thinks that the parameter of green laser pointer is accurate enough.