Abstract
With the rapid development and gradual maturity of the laser manufacture craft, the lasers started heading for the physical laboratory of the university from the professional laboratory. At present, most of the science and engineering physics laboratory are equiped with lasers, especially the He-Ne lasers. People can observe and measure He-Ne laser power, divergence angle, transverse mode, longitudinal mode and other performance parameters by using lasers. On the basis of using the lasers, people can do research on alignment, positioning, holography, measurement, precision measurement and CD recorders. However, the problem of no producing lights which is caused by disorders of laser cavity is becoming more and more common during the usage. This paper describes the working principle of lasers, and analyses the reason why it can not produce lights. The author introduces several methods to solve the problem of no laser light correctly and quickly.
Keywords:He-Ne laser, optical resonator, the laser correction