Identification of multimodal vortex optical orbital angular momentum in
Identification of multimodal vortex optical orbital angular momentum in multimode fiber speckle patterns Hangyu Zhang a, ZiFei Li a, LeiHong Zhang a, HaiMa Yang a, Quan Sun b,
Speckle
Multimode
Fiber
PIC
Dynamic 3D holographic projection of vectorial images with a multimode
An optical multimode fiber (MMF) is capable of delivering structured light modes or complex images with high flexibility. Here, we present a holographic approach to enable the MMF as
au:Sui_X in:physics
Imaging through perturbed multimode fibres based on deep learning has been widely researched. However, existing methods mainly use target-speckle pairs in different configurations. It is
Sources of optical radiation and methods for providing low-speckle
U.S. Patent Application US20160352066A1 for the present disclosure relates more particularly to active optical fibers, amplified spontaneous emission (ASE) sources using such active optical fibers, and
Speckle-based image reconstruction via uniform illumination in single
Abstract Conventional multimode fiber (MMF) imaging systems based on Gaussian illumination often suffer from uneven speckle distributions, which limit image reconstruction quality
Event-based Speckle Interrogation for High-Bandwidth Multi-point
In this work, we report an innovative interrogation scheme for speckle-based optical fiber sensors using event-based sensors (EVS) together with a tensor-based methodology capable of separating and
Deep learning and superoscillatory speckles empowered multimode
This work introduces an in-situ nano-displacement measurement system via a multimode fiber probe with superoscillatory speckles and deep learning.
Dynamic Multimode Fiber Specklegram Sensor Smart Bed Enabled
We achieve this by recording videos of speckle from a single multimode fiber that covers a mattress in an S-configuration, and train convolutional neural networks directly on the video data. We show that
AI-assisted spectrometer based on multi-mode optical fiber speckle
Speckle patterns at the output end of a multi-mode fiber (MMF) are generated by the interference of eigenmodes propagating along the fiber. A MMF can
Multimode optical fiber transmission with a deep learning network
Multimode fibers (MMF) scramble the waves propagating inside them and produce seemingly random patterns known as speckles at their outputs. Despite this seemingly random
The Optimization of Multimode Fiber Speckle Sensor for
The signal intensity, demodulated from the speckles, is different when using multimode fibers with different diameters. At the same time, the sensing effect of different fibers depends on the
Anti-perturbation multimode fiber speckle imaging and recognition
Specifically, we propose a speckle imaging model that consists of a lightweight encoder-decoder architecture and a weighted loss function, enabling high-fidelity image transmission through
High-Speed Multi-D Optical Field Measurement
Here, we present a compact high-dimensional optical field analyzer employing a discrete spatiotemporal sampling architecture based on multimode and multicore fibers. An optical delay line array maps
Spatial correlation analysis of multimode fiber speckles generated
A coherent superposition of mode fields in a multimode fiber (MMF) can introduce a speckle pattern, of which the statistical properties are highly dependent on the modal conditions.
Design, development and characterization of a 3D-printed low-force
In particular, the use of multimode fiber (MMF) for generating speckle patterns has attracted significant attention in the development of fiber specklegram-based techniques capable of measuring a wide
Honglin LIU | Shanghai Institute of Optics and Fine
Multimode fibers (MMFs) are a promising solution for high-throughput signal transmission in the time domain.
Investigation on Speckle-Free Imaging at the Output of
When a coherent light source is incident on a multimode fiber, a speckle field is formed at the output of the multimode fiber because of the
Learning to see speckle in weak laser field through multimode fiber
Multimode fibers (MMFs) have great potential for endoscopic imaging due to the high number of modes and small core diameter. Deep learning based on neural networks has received
Multimode Fiber Speckle Imaging Using Integrated Optical Phased
Abstract: The silicon optical phased array has emerged as a promising approach for speckle imaging through multimode fibers. High spatial resolution typically requires a large number of phase
Multimode optical fiber based spectrometers
Finally, we demonstrate a method to reduce the spectrum reconstruction error and increase the bandwidth by separately imaging the speckle patterns of orthogonal polarizations. The multimode
Speckle Analysis in Multimode Optical Fibers for Chemical and
Our findings offer practical guidance for selecting appropriate demodulation techniques in multimodal sensing applications and highlight the potential of speckle-based systems for robust, low
System and method providing intracoronary laser speckle imaging for
Another technique has been investigated, i.e., a Laser Speckle Imaging (“LSI”) technique which can provide measurements related to biomechanical, compositional and morphological factors potentially
The Optimization of Multimode Fiber Speckle Sensor for
Fiber specklegram sensors (FSS) are a kind of sensor based on the intermodal interference of multimode optical fibers (MMFs) . When coherent light is incident into a multimode
(PDF) Experimental characterization of the speckle pattern at the
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
Multimode Fiber Imaging With Bit-Plane Encoding:
High-performance natural scene image transmission via multimode fiber (MMF) represents a substantial challenge. Conventional MMF gray imaging system
Enhancing Fiber-Optic SPR sensor performance using
The performance of a sample SPR sensor based on an Ag-coated single-mode fiber (SMF) sandwiched between two multimode fibers (MMFs) is experimentally evaluated by
Speckle Analysis in Multimode Optical Fibers for Chemical and
This article presents a comparative study on the performance of three widely used speckle demodulation algorithms, average intensity algorithm (AIA), normalized inner product coefficient
Record-High Efficiency Speckle Suppression in Multimode Fibers
We present a technique that utilizes cascaded resonant cylindrical piezoelectric ceramics and multimode optical fibers wound around them to effectively mitigate laser speckle. By precisely
Output beam shaping of a multimode fiber amplifier
Multimode fibers provide a promising platform for realizing high-power laser amplifiers with suppressed nonlinearities and instabilities. The potential degradation of optical beam quality has