VLP-2000 is a high-precision laser power meter manufactured by Beijing Ranbond Technology Co.,Ltd., which can be equipped with sensors of different specifications for measuring laser sources of different wavelengths and different power levels. The laser power meter is used for measuring the power of the CW/pulsed laser etc. The spectrum response range 11nm~ 19μm. It is widely used in the research,teaching, medical, science, industry and other fields. It can be used continuously for a long time without repeated calibration. Because of the characteristics of laser beam output, the core of laser power measurement lies in the design of laser detector.The detector of thepower meter is equipped with a self-developed thermopile sensor, which adopts thin film thermopile technology and anti-damage coating anufacturing technology, and has excellent performance, including anti-damage, linearity and uniformity. The calibration of the power meter has an important influence on the accuracy of measurement.When the power meter leaves the factory, the quantity value can be directly traced to the standard device of National Bureau of Measurement, which reduces the intermediate link of quantity value transmission and has high precision of factory calibration.