Experiment on polarized laser energy transmission under smoke environment

Polarization is another property of light, except intensity, spectrum and phase. A lot of information of its own different from other material is contained polarization characteristics of the object. Light absorbed and scattered by suspended and drifting particles in its process of transmission through smoke and haze environment. Thus the energy and the polarization state of light are changed. How to eliminate and reduce influence of the transmission environment for polarized light, to analyze affecting factors scientifically, it is the key problem of the relation research field. The smoke environment simulation system has been established in our laboratory. Smoke tank box is released smoke by the smoke generator. Therefore, the different concentrations of smoke environment are controlled. Through three processes of the smoke filled, hold and exhaust smoke, we test change of transmission energy and the polarization state of the light. The 532nm laser is modulated three kinds of polarized light of 0°, 45 ° line polarized light and left circularly polarized light. There three kinds of polarized light are regarded as incident light source, respectively. Three kinds of incident light source pass respectively smoke environment. Then energy attenuation process of change over time can be recorded. At last, more calculate and analyze about the change of different polarization laser under different concentrations of smoke. So the different polarization laser energy transfer characteristic curves are obtained.