大学物理英语论文

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Laser’s development and applications

In 1958, the American scientists Shawalowand Townes find a singular phenomenon ： when they will be launched in the light bulb light in a rare earth elements , crystal the molecules of a bright and always get together again. According to this phenomenon, theycame up withthe Laser Principle, by its elements in the oscillating same frequency as the energy and motivation will produce the skin of light - the laster. They delivered important for this paper.AfterSchawlow and Towns’ research, scientists have made the countries of the proposed scheme, but without success.

In May 15, 1960,californiahughes laboratory scientists announced that the wavelength memain for 0.6943 micron laser, this is the first ever of the laser, which may become united in the world will be introduced for the first light of the areas of scientists. In July 7,1960 , the development of the world united a success of the laser, the first united, the use of the scheme is a powerful beacon, to stimulate the ruby crystal the Cr atoms, which results in a rather focus on the thin red ray, and when it to a certain point, but to achieve even higher than the sun's surface temperature.

As the scientists of the research and more better laser by scientists developed rapidly, the laster also been applied to various trades and the people's lives and social development played an alternative function.

Laser welding ： car body nowadays thick cardboard, vehicle spare parts, of lithium battery, the heart performs a result, airtightness etc sealing device relay, all are not allowed to welding pollution and deformity of the device. the use of lasers is yag laser, the semiconductor laser and pump CO2 - laser.

Laser cooling ： laser is the cooling and laser the interaction of atoms are extremely slow down the movement to the atom of technology. this important technical the main purpose is to the precise measurements of atoms, in the high resolution laser spectrum and has high precision clock is a quantum frequency (atomic clock).1



翻译： 激光技术的发展及应用。

1958、美国科学家肖洛和斯找到一个奇异的现象：当他们将在稀土元素在灯泡中光发射

Wangyu, Scientific journal of northwest university of post and telecommunications[9] ,2009.

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时，水晶发光，分子总是再相聚。根据这一现象，了解了激光的原理，通过在振荡频率相同的元素作为能量和动力，会产生光的皮肤激光。他们发表论文重要。肖洛和城镇的研究之后，科学家们提出研究的方案，但没有成功。

1960年5月15日，加利福尼亚休斯实验室的科学家们宣布，产生0.6943微米的激光波长memain，这是有史以来第一次的激光，这美国首先拥有世界上第一区域的光。在1960年7月7日，世界联合成功产生激光，第一次合作，配合该计划是一个强大的灯塔，以刺激红宝石晶体的铬原子，这导致在一个相当短的波段的的红色射线聚到了一点，产生的温度甚至高于太阳表面温度。。

科学家们的研究使得激光技术很快地发展，激光也被应用于各种行业，对人民生活和社会发展起到了不可替代的作用。

工业上在焊接焊接车身的外壳、汽车零件、锂电池、心脏起结果，气密性密封装置，继电器等时，都不允许焊接设备的污染和畸形。使用激光器，YAG激光器，激光半导体激光泵CO2等，可以很好地避免这个问题。

激光冷却：激光是冷却和激光的相互作用使得原子是非常缓慢的运动的技术。这一重要技术的主要目的是对原子的精确测量，在高分辨激光光谱中具有高精度的时钟是一个量子频率（原子钟）。

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