The technology used by green laser pointer with remote control

As displacement increases, F (t) and x (t) is no longer a linear relationship, namely bound electron nonlinear optical effects (harmonic generation, optical rectification, etc.) sources. To 1014 W/cm2 laser intensity level, the ionized atoms. At the threshold, the electron is still bound and become free in the process of high harmonic generation. Higher intensity, such as to 1018W/cm2 the order, the electron is free and close to the speed of light. High-intensity area (1014W/cm2- 1018W/cm2) the work is generally based on non-relativistic Schr?dinger equation and the dipole approximation, basically it deals with bound electronic nonlinear optics, including high-order harmonic generation, multiphoton ionization, and so on. The customer gave many pieces of advices to the design of green laser pointer.
Ultra-high-intensity area in the (> 1018W/cm2) exciton laser plasma interaction produced a series of new phenomena such as relativistic self-focusing, X-ray generation, high-order harmonic, electrons, protons accelerated electron-positron pairs produced , and nonlinear QED effects. Laser intensity into this area, the importance of the magnetic field becomes a dynamics. Longitudinal momentum of electrons is much larger than transverse momentum, the movement of this complex is the source of relativistic nonlinear effects. E due to the Lorentz force (v × B) and the violent acceleration, and drag the subsequent massive ions along the laser propagation direction to establish a strong electrostatic field, with its magnitude and the laser transverse electric field. To a plasmon excitation wavelet, known as wakefield, which provides for the last wave of charged particles acceleration mechanism. The customer thinks that the design of green laser pointer should be further improved.
Tajima and Dawson in 1979 predicted the effect, but had to wait until the emergence of ultra-high intensity laser was only confirmed. In 2006, WPLeemans and others with a peak power of 40 TW laser at the cm scale have the highest electron beam energy of 1GeV [8]. If there is a strong transverse electromagnetic wave of intensity distribution, it will cause the nonlinear refractive index changes, leading to self-focusing. This effect discovered in 1962 by the Askar'yan. In the relativistic laser-plasma interactions in the exciton, the origin of self-focusing relativistic electron mass increase in the ponderomotive force and effect of the plasmon density redistribution. Wave speed with the tail as in the case as early as the 1960s and 1970s, scientists had predicted this effect. The client believes that the new design of green laser pointer should be approved by the director at first.
The initial wave field is almost uniform self-focusing filamentation instability can cause: At first there was a slight adjustment in the horizontal amplitude, then the refractive index modulation leading to wave before the song changes, so the electromagnetic field energy in the lateral re-distribution, growth and volatility are not the result stability to continue to develop. Relativistic self-focusing laser beam and the channel is closely related to the magnetic interaction. Do relativistic electron moving in the plasma current is generated within the exciton and quasi-static magnetic field, attract each other has led to the current electronic redistribution. Conversely, due to relativistic electron mass increase in the fast electron density in the region has the smallest exciton effective plasma frequency, thus changing the refractive index of plasma exciton. This process led to the merger of the pulse wire, and long-distance transmission of laser energy provides a possible mechanism. The parameter of green laser pointer cannot be revised randomly.
There is no relativistic self-focusing and ultrashort laser pulses into a wire self-consistent analytical theory, many of these pulses from a self-focusing dynamics computer simulations. High-order harmonic generation show the basic physics style non-linear process, from which other until the relativistic-intensity laser plasma interaction between excitons are observed in the high-order harmonics. The physical mechanisms have much in common, on the one hand, the driving motivation of nonlinear systems of periodic response characteristics; the other hand. Response mode depends on the interaction parameter of the laser material, mainly the laser intensity. In the moderate-intensity level (sub-relativistic), high frequency cut off depends on the harmonic ponderomotive force potential. The parameter of green laser pointer can not be revised unless getting the permission of the director.