Device for high-precision testing of output power stability of wide-spectrum light source

The invention discloses a device for high-precision testing of the output power stability of a wide-spectrum light source, and the device includes an optical filter, detectors, an amplification circuit, a data acquisition circuit and a display circuit. The optical filter filters light emitted by a wide-spectrum light source to be tested, light of a certain wavelength is selected to enter the detector, the detectors convert optical signals into current signals, the current signals are fed into the amplification circuit and are converted into voltage signals through I/V conversion, the voltage signals are amplified and then transmitted to the data acquisition circuit, the data acquisition circuit performs lowpass filtering and AD conversion on the voltage signals to convert analog signals into digital signals, the digital signals are displayed and recorded on the display circuit, and according to recorded optical power numerical values, the optical power stability of the wide-spectrum light source is obtained. The device provided by the invention adopts three optical detectors to form optical trap type detectors, and light is reflected among the three detectors for multiple times, so that the reflectivity is reduced, thereby improving the responsivity and precision of the detectors.