Used to achieve population inversion of the laser working medium

Used to achieve population inversion of the laser working medium. The media have ruby, gas, liquid, solid, medium with ruby, gas, liquid, solid, semiconductor, etc. Conductors and so on. (2) sufficient optical pumping light intensity, that is excitation source. Generally have a strong enough power laser optical pumping, the excitation source. Optical excitation, thermal excitation, chemical and other incentives. Reed, optical excitation, thermal excitation, chemical and other incentives. 3 cavity. Resonator. Ruby semi-lens three laser resonator system of material incentives work to indicate the structure of § 2 laser generation and laser three laser The laser protection design of  cell phone jammer  resists the current surge so as to make a long lifetime.The laser classification 1 classification by the working substance: classification of substances according to the work: classification of substances by solid-state lasers work liquid gas lasers Semiconductor lasers Laser III laser solid-state laser material work: work material: the incorporation of metal ions in the ruby crystal or glass matrix material gas lasers work: work material: atomic gas, molecular gas atoms, gas and plasma gas helium-neon gas laser, argon ion laser laser liquid laser working substance: Working material: organic and inorganic compounds in solution dye solution dye lasers operating mode semiconductor lasers classified by pulsed laser continuous wave lasers classified by UV laser wavelength range of visible light laser infrared laser mode-locked femtosecond laser can produce femtosecond titanium sapphire laser magnitude of the light pulse. Mode-locked femtosecond Ti-sapphire laser to produce the order of the light pulse. Work material is mixed with titanium sapphire (Ti) of the three alumina (sapphire material is mixed with the work of titanium (Ti) of the three alumina (Al2O3). The  cell phone jammer  supports the browsing of all formats of demonstrating files and websites.Nd: YVO4 laser Nd: YVO4 laser femtosecond titanium sapphire laser laser test system first a feature: a kind of pulses of laser operation, the first run features a kind of laser pulses, the duration is very short, only a few femtoseconds a femtosecond is 10 seconds, which is the negative power of 1 / trillion second, a femtosecond is to a negative power of 15 seconds, which is / 1,000,000,000,000,000 seconds. This camera records all the information called light: holographic. Hologram. Working during the frequency band of 2.4GHz,  cell phone jammer  could obtain larger serviceable range.Second, the basic principle of a beam of coherent light (laser) beam of coherent light (laser) light vertically through the two parallel slits on S S1 and S2, S1 and S2 by two beams of light emitted two beams on the screen P P superimposed on the screen light into fringes. If the slit S stripe. If the slit as the object S2, S1 as a reference source, then the screen as a reference light source, interference fringes on the screen P S is the object of the interference fringes on the S2 is the object hologram.