Design and application about a set of testing system of 1.06μm laser emission's transmitting performance

Abstract

A set of testing system has been designed to measure the transmitting performance of 1.06μm laser emission passed through various aerosol media. The system includes a semiconductor-pump laser emitter with high power, a laser power detecting system, a piece of A/D collection card and a computer with special software for data treatment. The emitter can continuously export 10W 1.06μm laser emission. The diameter of the laser beam at the aperture is 4mm and the beam divergence angle is smaller than 2mrad. The precision of the power meter is about 0.001W within 20W. The power detector can translate the power data into simulation voltage signal and transmit it to the A/D card. The software is applied to get the data of laser power from the A/D card and translate it into numerical signal to analyze or calculate by computer. The power curve may be drawn while peak value and average power may be analyzed and calculated by the program for engineering design or scientific research. Furthermore, the transmitting performance or attenuation laws of 1.06μm laser emission passed through various media may be quantitatively measured or analyzed by collecting background power and sample power after transmitted through a kind of medium. As an example, the transmitting performance of 1.06μm laser emission passed through water fog has been quantitatively measured. By the result, the 1.06μm laser emission is easy to be attenuated by water fog and the attenuation effect depends upon the concentration of the aerosol, optical length and other factors.