Low-loss antireflection for laser system

Abstract

Abstract: In the laser systems for measurement and so on, like gyro; in its laser cavity or path, it makes use of the optical components which need very high performances, like low losVi low scatter i low reflection i low absorption and high transmittance. In this article, we design and manufacture the 632.8nm(He-Ne laser) low loss AR (LLAR) on crystal quartz, the results show this LLAR have the total loss is about 30ppm and ha ve high uniformity , the fluctuations of the total loss mainly from the surface contamination and the inner defects of crystal material. Key words: the total loss, antireflection, crystal quartz 1. Introduction For high precision laser systems which apply for measurement, like gyro and so on, the optical components which lie in the cavity or laser path need to control the total losVi scattering ireflection iabsorption and etc. In some case, Crystal Qu artz has been used for polarization control or frequency choice, so LLAR should be deposited on the surface of Crystal Quartz. In this situation, the total loss is composed of reflectance and scattering of surface i absorption of coating i scattering and absorption of the substrate, that is: LTotalLoss L R