英语翻译Laser is constructed form three principal parts:An energ

英语翻译
Laser is constructed form three principal parts:An energy source (usually referred to as the pump or pump source),a gain medium or laser medium,and two or more mirrors that form an optical resonator.
pump source
The pump source is the part that provides energy to the laser system,Examples,of pump sources include electrical discharges,arc lamps,light form another laser,chemical reactions and even explosive devices,thetype of pump source used principally depends on the gain medium,and this also determines how the energy is transmitted to the medium.A helium-neon (HeNe) laser uses an electrical discharge in the helium-neon gas mixture,a Nd:YAG laser uses either light focused form a xenon flash lamp or diode laser,and excimer lasers use a chemical reaction.
Gain medium
the gain medium is the major determining factor of the wavelength of operation,and other properties of the laser.There are hundreds if not thousands of different gain media in which laser operation has been achieved.the gain medium is excited by the pump source to produce a population inversion,and it is in the gain medium that spontaneous and stimulate emission of photons takes place,leading to the phenomenon of optical gain,or amplification.

激光构造形式的三个主要部分：一个能源来源（通常称为泵或泵源） ,增益介质或激光介质,和两个或两个以上的反射镜组成,光学谐振.
泵浦源
泵浦源是部分提供能量的激光系统,例如,泵来源包括电器放电,弧灯,轻形式,另一种激光,化学反应,甚至爆炸装置, thetype的泵浦源,主要用于依赖于增益介质,这也决定了如何能源是传送到中等. 1氦氖（氦氖）激光用途电器放电,在氦氖混合气体, Nd ： YAG激光用途,无论是轻的重点是形成一个氙闪光灯灯或二极管激光器,准分子激光器和使用的化学反应.
增益介质
增益介质是主要的决定因素的波长的运作,和其他财产的laser.there是数以百计,如果不是数以千计的不同增益介质,其中激光手术已achieved.the增益介质是兴奋,由泵浦源产生人口反演,它是在增益介质认为,自发的和刺激的排放量光子发生,导致这一现象的光学增益,或扩增.