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Seeing through multimode fibers with real-valued intensity transmission matrices
Optics Express
|July 19, 2020
Summary
Researchers developed a simple, high-speed method for retrieving images transmitted through multimode optical fibers. This technique leverages pseudo-linearity in light intensity, simplifying image retrieval for applications like miniature endoscopes and telecommunications.
Area of Science:
- Optics and Photonics
- Biomedical Engineering
- Telecommunications
Background:
- Image transmission via multimode optical fibers is crucial for miniaturized endoscopes and high-capacity telecommunications.
- Conventional methods require complex-valued transmission matrices, increasing experimental and computational complexity.
Purpose of the Study:
- To develop a simplified and high-speed method for image retrieval through multimode optical fibers.
- To investigate the pseudo-linearity between input and output light intensity distributions.
Main Methods:
- Demonstration of pseudo-linearity between input and output light intensity.
- Experimental and numerical simulations to validate the image retrieval technique.
- Analysis of key parameters: image pixel count, fiber core diameter, and numerical aperture.
Main Results:
- Faithful retrieval of various binary and grayscale images from output speckle patterns.
- Demonstrated the effectiveness of the pseudo-linearity approach.
- Quantified the impact of critical fiber and image parameters on retrieval fidelity.
Conclusions:
- The developed method offers a simple and high-speed alternative for image retrieval in multimode fibers.
- This technique has significant potential for applications in miniaturized biomedical endoscopy.
- The method is also promising for advancing spatial-mode-division multiplexing in telecommunications.
