The main process of manufacturing the laser

1964, in accordance with the well-known scientist Qian proposed that "by the excitation light" to the laser.
Einstein relation - A21, B21 and B12 of relationship between thermal equilibrium blackbody radiation formula mode density of two kinds of stimulated transition more (thermal equilibrium conditions) per unit time STE increase the photon number density per unit time STA to reduce the photon number density W n1 = B ρν n1 12 12 W21n2 = B21ρν n2 f2 Q thermal balance , 2 <n1 usually n f1 STA> STE (by) received shock absorption accounted for the main lead, therefore, when the light transmission medium, the light will be absorbed and attenuated.You may realize the page-turning function in ACDSee the picture software by operating china laser pointer. 4 as a cause of spontaneous emission photon stimulated emission of light outside the initial phase of the stimulated emission of light from the media outside the spontaneous emission of laser generated by the basic principles (Overview) laser-produced conditions: (1) anti-particles transfer distribution (2) gain> loss that is self-excited oscillation threshold condition one, the dominant stimulated emission conditions - population inversion distribution n2> n1 E reverse distribution n2> n1 (population inversion)? n2 = e n1 room temperature, Bolzman distribution n (E2? E1) KT (f1 = f2) n2> n1 inversion distribution dominated by stimulated emission of light amplification to achieve population inversion of the working substance is called the gain (or activate) the number of medium particles Reverse distribution is a prerequisite to generate the laser to achieve population inversion distribution?If the software of green laser pointer you use could be user-defined with shortcut key, you could define a key as page-turning key so as to remote control it. Only by relying on the material to provide energy to the outside world (also known as pump excitation) in order to break the heat balance, to achieve population inversion pump method 1 optical a) flash; b) other lasers (such as semiconductor lasers) (2) Power a) gas-discharge; b) high-energy electron beam; c) the injection current (generating electron - hole pair) 3 reaction a) fire; b) explosive 4-ionizing radiation a) nuclear bomb b) X-ray 5. laser characteristics: color good, good direction, light intensity coherent light (coherent light) spontaneous emission - non-coherent light - photons degeneracy of the low coherent light by stimulated emission of radiation - - What is the photon-photon degenerate high degree of degeneracy n - measure of coherence with the same parameters of light energy and momentum of the photon number (also known as same-state photon number) of photons in the same model a few examples: blackbody radiation source (approximate closed cavity) photon degeneracy of the mode density nν assigned to each mode of blackbody radiation.Most china laser pointer produced by our company apply the RF technology. The average energy Conclusion: blackbody radiation in the infrared and visible light for non-coherent light of the total number of children to avoid many of the patterns, the specific mode of ρν increased, the STE photon coherent focus on one or a few mold.

The initial laser laser's Chinese name is called "laser", "les" is its English transliteration of the name LASER is taken from the English Light Amplification by Stimulated Emission of Radiation the first letter of each word consisting of abbreviations.What does the 2.4MHz on the china laser pointer mean? Means "to expand by stimulated emission of light." Laser has been completely full name in English to express the main process of manufacturing the laser.