Composite absorber structure of total-absorption high-energy laser energy meter

Abstract

The invention discloses a composite absorber structure of a total-absorption high-energy laser energy meter. The composite absorber structure comprises a main absorber, a receiving cone and a reflector, the main absorber is a combined cavity, the receiving cone is movably connected with an opening of the main absorber, the receiving cone is composed of two sections of conical structures which are movably connected and have different cone angles, the reflecting mirror is located in the main absorber and at the bottom opposite to the opening of the main absorber, and the main absorber and the receiving cone are connected through a connecting transition piece with low thermal conductivity. A high-energy laser beam is incident in the direction parallel to the axes of the receiving cone and the main absorber, is reflected by the inner surface of the receiving cone, enters the main absorber, and is absorbed after being reflected on the inner surface of the main absorber for multiple times. According to the invention, the overall size of the laser energy meter is effectively controlled, the laser damage resistance of the energy meter is improved, the loss of energy escaping from an opening is reduced, and the measurement accuracy of the high-energy laser energy meter is improved.

Description

technical field [0001] The invention relates to the field of high-energy laser optical parameter measurement, in particular to a composite absorber structure of a total absorption high-energy laser energy meter. Background technique [0002] Accurate measurement of the output energy of high-energy lasers is an important index for evaluating the quality of lasers and the level of laser development. For the quantitative measurement of high-energy laser energy, if indirect methods such as attenuation and sampling are used, the sampling ratio of the attenuation and sampling components is easy to change under the action of the laser. A small change in the sampling ratio will lead to large errors in energy measurement. Therefore direct measurements are required. The traditional photoelectric method and pyroelectric method are not applicable, and the calorimetric method is usually used. The calorimetry method can realize the complete absorption measurement of the laser energy dir...

AI Technical Summary

Problems solved by technology

However, the simple conical cavity is easy to cause breakdown due to energy accumulation at the top of the cone. If the incident direction is deviated, it is easy to cause the beam to reflect out of the cone, which will cause energy loss and cause incorrect measurement results.

In a single integrating sphere structure, the beam energy may escape from the opening of the sphere. In order to minimize the escaped energy, it is necessary to increase the diameter of the integrating sphere, which makes the volume of the laser energy meter relatively large.

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