The invention relates to a
laser parameter detection device, in particular to a
laser power meter and a method for calibrating a sampling coefficient of a large optical
system based on the
laser power meter. The problems that when an existing laser power meter is applied to large optical
system sampling coefficient calibration in an industrial field, the structure is not compact, installation and testing in the industrial field cannot be achieved, long-distance transmission cannot be achieved, and the calibration cost is high are solved. The laser power meter comprises a to-be-measured laser optical sampling module, a
photoelectric conversion analog circuit module and a digital circuit module which are directly connected in sequence; the device is of an
integrated design, is compact in structure, is easy to integrate, facilitates the installation, debugging and maintenance of an industrial field, and can be applied to the calibration of a large-scale optical
system sampling coefficient. In the calibration process, the influence of
background light is deducted, the interference of background
stray light on sampling coefficient measurement is weakened, and the whole calculation method is simple, convenient to realize online and short in
processing time. And meanwhile, due to synchronous sampling, the interference of
light source fluctuation on sampling coefficient measurement can be reduced.