 This study demonstrates a new method for high-resolution imaging with a flexible multi-mode fiber, using a swept laser source and wavelength-dependent speckle illumination. This allows for independent control of bandwidth and scanning range, eliminating the need for mechanical scanning. Additionally, the use of a narrow-sweeping bandwidth of 2447680 nanometers, NM, while maintaining acquisition times reduced by 95%, compared to conventional raster scanning endoscopy. This method is particularly useful for detecting fluorescent biomarkers in neuro-imaging applications, as it provides device simplicity and flexibility for minimally invasive endoscopy. This article was authored by Benjamin Lechocki, Alexandra Ivanina, Akchi Bandho, and others.