GAO800 Optical Power Meter, a new generation of high-performance optical network test meter, with the characteristics of excellent performance and fast filed?test, has adopted the latest laser exploration and processing technology. It is a compositive optical power meter aimed at optical network maintenance, equipment research and development. It can be used to test optical power within the range of 800~1600nm wave length, with the unit as µ W, dB and dBm. Its display resolution level and test accuracy are high. There are 850nm, 980nm, 1310nm and 1550nm four kinds of wavelength calibration points in it. It can be used for linearity and non- linearity test, and it can display both direct and relative test of optical power.