Myriawatt-level high-power integrating sphere laser testing device

Abstract

The invention discloses a myriawatt-level high-power integrating sphere laser testing device, and the device comprises a water-cooled integrating sphere, a diffuse reflection coating, a concave lens,a laser detection module, a light barrier and a convex reflector; the laser to be tested enters the water-cooled integrating sphere through the concave lens, is diffused in the water-cooled integrating sphere and irradiates the convex reflector; the light beam is reflected to the inner wall of the water-cooling integrating sphere through the convex reflector; a diffuse reflection coating is arranged on the inner wall of the water-cooling integrating sphere; the light beam diffusely reflected by the diffuse reflection coating is sampled and tested by the laser detection module; the laser detection module converts an incident optical signal into an electric signal, obtains the laser power of the incident water-cooled integrating sphere according to the aperture ratio, and reversely deduces the power of the laser to be measured according to the reflection loss of the concave lens. The device can directly test the myriawatt-level high-power and small-divergence-angle laser power by using the integrating sphere, has short response time, and improves the laser test efficiency.

Description

technical field [0001] The invention relates to the technical field of laser power testing, in particular to a 10,000-watt high-power integrating sphere laser testing device. Background technique [0002] With the development of laser technology, the laser power has been continuously improved. At present, lasers with an output power of 10,000 watts have gradually come out of the laboratory, and high-performance laser cutting and processing equipment on the market are also equipped with 10,000-watt lasers. In the process of development and maintenance of 10,000-watt-level high-power lasers and related equipment, it is necessary to test the laser power. The test of laser power can be divided into three categories from the test principle, one is direct test by calorimetry, and the other is One class is to test by pyroelectric plus chopping, and the other is to carry out sampling test. [0003] For 10,000-watt-level high-power lasers, direct testing by means of calorimetry requ...

AI Technical Summary

Problems solved by technology

For traditional integrating spheres, the incident laser light is directly irradiated on the diffuse reflection coating on the inner wall of the integrating sphere through the light entrance hole. This structure is suitable for low-power lasers, but for high-power lasers, especially those with small divergence angles For high-power lasers, the laser power density will be very large. When the power density exceeds the damage threshold of the diffuse reflection coating, the coating will be destroyed, and the test results cannot be guaranteed to be accurate. In severe cases, the entire integrating sphere will be damaged.

Images