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A Method of Improving Beam Quality Based on Phase Carrier

A phase carrier and beam quality technology, applied in the laser field, can solve the problems of not considering the periodic modulation of the beam, and achieve the effects of improving the quality of the near-field beam, convenient operation, and simple structure

Active Publication Date: 2021-09-07
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

However, the final loaded rectangular phase carrier distribution requires the superposition of two 1D rectangular phase carriers of different spatial frequencies and does not take into account the periodically modulated beam

Method used

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  • A Method of Improving Beam Quality Based on Phase Carrier
  • A Method of Improving Beam Quality Based on Phase Carrier
  • A Method of Improving Beam Quality Based on Phase Carrier

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited in turn.

[0028] see first figure 2 , figure 2 It is a structural schematic diagram of the method for improving beam quality based on phase carrier in the present invention. As can be seen from the figure, the method for improving beam quality based on phase carrier in the present invention includes the following steps:

[0029] 1) The spatial filter is composed of a first lens 2, a filter aperture 3 and a second lens 4, and the first reflector 6 and the second reflector 6 are sequentially placed in the optical path of the periodically modulated light beam 1 before the spatial filter. mirror 7, polarizer 8 and beam splitting prism 9, the beam splitting prism 9 divides the incident light into transmitted light and reflected light, a detector 10 is set in the direction of the reflec...

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Abstract

A method for improving the quality of near-field beams based on phase carrier. This method only needs to install a reflective phase-type spatial light modulator in the optical path, and load a rectangular shape with a suitable spatial frequency on the reflective phase-type spatial light modulator. The phase carrier can solve the contradiction between the size of the plugging hole and the size of the filter in the spatial filter, ensure the filtering effect, and improve the quality of the near-field beam. The invention has the characteristics of simple structure and convenient operation.

Description

technical field [0001] The invention relates to the field of laser technology, more specifically, the invention relates to a method for improving the quality of near-field beams based on phase carrier. Background technique [0002] In a high-power laser system, during the transmission of hundreds of meters, various amplitude modulations and phase modulations will be introduced to the near-field beam due to the quality of optical components, dust in the environment, and pollution particles, which not only reduces the The beam quality of the system is improved, and the probability of damage to optical components is increased, which also increases the operation and maintenance costs of the system. These modulations are mainly divided into three types: modulation caused by a single local obstruction, aperiodic random distribution modulation and periodic modulation. Among them, in addition to introducing periodic modulation to the near field, the periodic modulation will also in...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133
CPCG02F1/13306
Inventor 高雅茹刘德安张盼
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI