Wavelength Scanning Multimode Fiber Imaging

Ultra-thin optical fibers play a vital role in the development of minimal invasive endoscopes. Commonly, there are spatially resolved monochromatic light patterns created at the distal end of the fiber [1], providing imaging in hard-to-reach places. The signal from the sample is collected via a single pixel detector. This configuration allows for the exploration of compressive sensing algorithms, using a sub-Nyquist set of patterns and the computational super-resolution reconstruction of the sample [2]. However, in all those configurations a light scanning element is necessary. In this study we demonstrate a new way to generate dynamic illumination patterns for multimode fiber imaging with a mechanically scan-free approach. The wavelength of light can be used as an additional degree of freedom to control the spatial profile at the fiber output.