Variation of speckle in multimode fiber over time

Using a conventional semiconductor laser and a multimode optical fiber we study experimentally how the speckle pattern depends on the laser pump current and on the image acquisition settings. During multimode fiber (MMF)...

Speckle Analysis in Multimode Optical Fibers for Chemical and

We examine how these algorithms perform when analyzing speckle patterns from a polymer optical fiber exposed to variations in both refractive index and pressure.

Learning rotated speckle patterns projected from step-index

In this study, under transverse displacement or oscillatory disturbances, an overall rotation of speckle patterns—along with local minor random variations—was observed in step-index

Anti-perturbation multimode fiber speckle imaging and recognition

In reference 16, researchers utilized deep learning to extract invariant fiber characteristics from speckle patterns of different fiber configurations, enabling image transmission through a

Global and local speckle variation in tensioned multimode fiber

We introduce a deep-learning technique to perform complete mode decomposition for few-mode optical fibers for the first time. Our goal is to learn a fast and accurate mapping from near-field...

Speckle-Based Strain Sensing in Multimode Fiber

In summary, we presented a multimode fiber based dynamic strain sensor that uses the evolution of the backscattered speckle pattern to extract a linear strain response.

Multimodal Speckle-polarization Fiber-optic Sensing for Localized

In this work, we present an alternative fiber-optic vibration sensing strategy that harnesses a multimodal architecture com-bining speckle and polarization interrogation.

Information distribution on regions of speckle patterns for imaging of

Multimode fibers (MMF) have been extensively investigated for transmitting images. The transmitting images are distorted into speckle patterns by MMFs, which can be reconstructed by

Experimental characterization of the speckle pattern at the output of a

Here we use a multimode semiconductor laser and a multimode fiber to generate speckle patterns and analyze how the amount of speckle depends on the laser current.

Space division multiplexing in standard multi-mode optical fibers

We experimentally demonstrate the feasibility of an original space division multiplexing technique based on the classification of speckle patterns measured at the fiber''s output.

Experimental characterization of the speckle pattern at

Here we use a multimode semiconductor laser and a multimode fiber to generate speckle patterns and analyze how the amount of speckle depends on the laser

Speckle characterization in multimode fibers for sensing applications

This paper proposes the characterization of speckle patterns of multimode fibers in view of sensing applications and particularly for detection of vibration or seismic activity.