Optical path pool for controlling multiple reflections of light beams through adoption of piezoelectricity and control method

Abstract

The invention discloses an optical path pool for controlling multiple reflections of light beams through adoption of piezoelectricity and a control method, and belongs to the field of optical detection. The optical path pool comprises two reflectors, an optical medium, a supporting device, a signal generator, a power supply and an optical detector, the reflecting surfaces of the two reflectors are oppositely arranged and are fixed by the supporting device, and the optical medium is positioned between the two reflectors; and the signal generator adjusts the height of the supporting device by controlling the output of the power supply. Small holes are formed in the reflecting mirror, a Gaussian beam emitter is arranged outside one small hole, and an optical detector is arranged outside the other small hole; and the Gaussian beam emitter, the two small holes and the optical detector are located at the same height. According to the invention, the position of the reflector is changed by controlling the deformation of the piezoelectric ceramic, so that the light beam reflection times in the optical path pool are controlled; and the problems that complex amplitude changes are small and high-sensitivity detection is difficult to break through when a light beam passes through an optical medium once are solved, and the advantages of being high in response speed, small in size, high in sensitivity and the like are achieved.

Description

technical field [0001] The invention belongs to the field of optical detection, and in particular relates to an optical path pool and a control method for piezoelectrically controlling multiple reflections of light beams. Background technique [0002] By increasing the distance between the light and the sample, the change response of the transmitted signal can be increased, thereby effectively improving the detection sensitivity. Multiple reflections are an effective way to achieve a long optical path. In the fields of scientific research, environmental protection, coal mine gas, and monitoring, a long optical path cell is required. The longer the distance between the beam and the material, the more obvious the complex amplitude change of the beam is, and the better it is for detection. [0003] At present, in many occasions where the optical path cell is used for optical detection, it is often necessary to pass the light beam through the optical path cell multiple times to ...

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Problems solved by technology

[0005] In order to solve the problem that the existing optical path cell can only control the reflection to a fixed number of times, and it is difficult to apply to the optical medium with a small cross-sectional area, the present invention provides an optical path cell and a control method for piezoelectrically controlling multiple reflections of the beam

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