Full-vector modulation single-fiber high-signal-to-noise-ratio three-dimensional imaging method and device

Abstract

The invention discloses a full-vector modulation single-fiber high-signal-to-noise-ratio three-dimensional imaging method and device. The device comprises a laser, a spatial light modulator, a polarization modulation module, an orthogonal polarization microscopic module and the like. Exciting light generated by the laser device passes through the spatial light modulator and the polarization modulation module to form a light field with any controllable phase, polarization and amplitude. And after the light enters the optical fiber, a full-vector transmission matrix is reconstructed through the cross-polarization microscopic module. And mode coupling, mode loss and polarization dispersion in the long-distance large-curvature multimode optical fiber are compensated through numerical processing of the transmission matrix. And axial scanning with a high signal-to-noise ratio is obtained by adding a propagation factor in a virtual frequency domain of an optical fiber emergent end, and high-signal-to-noise-ratio, high-resolution and large-depth imaging is realized, so that the method can be widely applied to the aspect of biomedicine.

Description

technical field [0001] The invention belongs to the technical field of optical fiber microscopy, and in particular relates to a three-dimensional imaging method and device for a single optical fiber with high signal-to-noise ratio of full vector modulation. Background technique [0002] In recent years, with the development of science and technology. There is a strong desire to be able to study the mechanisms of biological processes directly in complex organisms. Such applications require high spatio-temporal resolution, enabling imaging in three dimensions to capture critical depth-resolved tissue structures in the human body in real time. Multimode fiberoptic endoscopes, which can provide high-resolution 3D imaging, have attracted great research and commercial interest. [0003] However, in the transmission of long optical fiber or large curvature optical fiber, there are different degrees of fiber curvature radius, defects, etc. The mode coupling and mode-dependent los...

AI Technical Summary

Problems solved by technology

[0003] However, in the transmission of long optical fiber or large curvature optical fiber, there are different degrees of fiber curvature radius, defects, etc.

The mode coupling and mode-dependent loss caused by mode dispersion and polarization mode dispersion are further enhanced, which greatly reduces the signal-to-noise ratio of the image, especially for deep three-dimensional images

Images