A Large Field of View High Efficiency Fiber Coupling System

Abstract

The invention belongs to the technical field of optical lens design, and in particular relates to a high-efficiency optical fiber coupling system with a large field of view. 90%. This method can solve the problem that the existing optical fiber coupler products are limited by the numerical aperture angle of the optical fiber and the field of view is limited. The field of view, sensitivity and detection efficiency of the existing system can improve the imaging performance and have broad application prospects in the fields of quantum imaging, single-pixel imaging and computational imaging.

Description

technical field [0001] The invention belongs to the technical field of optical lens design, and in particular relates to a high-efficiency optical fiber coupling system with a large field of view. 90%. Background technique [0002] The fiber-coupled lens design technology is very mature, especially in the aspect of optical high-efficiency fiber couplers. There are mature solutions for optical fiber couplers at home and abroad, including Tholabs, Newport, Beijing Daheng Optoelectronics, Beijing Century Maofeng and other companies have shelf products. Existing fiber coupling lenses are designed for high coupling efficiency according to the numerical aperture NA of the fiber core, but the coupling field of view is small, usually the fiber NA = 0.22, and the field angle of the coupling lens that can be designed generally does not exceed 2mrad, In fact, the better the matching between the coupling lens and the NA value of the fiber, the higher the coupling efficiency, which limi...

AI Technical Summary

Problems solved by technology

Existing fiber coupling lenses are designed for high coupling efficiency according to the numerical aperture NA of the fiber core, but the coupling field of view is small, usually the fiber NA=0.22, and the field of view of the coupling lens that can be designed generally does not exceed 2mrad. In fact, the better the coupling lens matches the NA value of the fiber, the higher the coupling efficiency will be, which limits the field of view of the fiber coupler

[0003] With the development of detection technology in the new system, the demand for high-efficiency fiber-optic coupling systems with large fields of view has gradually emerged. For example, in quantum imaging, single-pixel imaging and computational imaging, on the one hand, high-bandwidth and high-sensitivity detectors are required 90% of the above-mentioned detectors adopt optical fiber coupling. On the other hand, it is necessary to directly detect the target in a larger field of view, and the field of view needs to reach about 100mrad. For the above-mentioned energy detectors, now The field of view of the coupling method with product design generally does not exceed 2mrad, which cannot meet the new requirements.

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