AI Article Synopsis
- Endoscopic imaging with multicore fibers (MCFs) suffers from pixelation, limiting resolution to a few micrometers due to large core spacing.
- Wavefront shaping can enhance resolution beyond core spacing but typically requires lengthy calibration tailored to the fiber's structure.
- The authors propose a new calibration method using a single digital hologram that utilizes digital phase conjugation and the MCF's memory effect, enabling focused scanning and simple pattern projection.
Article Abstract
Endoscopic imaging through a multicore fiber (MCF) is widely used but is affected by pixelated images, which limits its resolution to a few micrometers. This is due to the spacing between the cores in the MCF, which is large enough to avoid core-to-core light coupling. Wavefront shaping techniques have been shown to focus light to a resolution finer than the inter core spacing, however a long calibration procedure is needed. Moreover the calibration depends on the optical fiber conformation. Here, we show a calibration method using only one digital hologram. The method is based on digital phase conjugation and the memory effect of the MCF to focus and scan a spot. In addition, we show how simple patterns can be projected using the same multicore fiber.
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| http://dx.doi.org/10.1364/OE.23.030532 | DOI Listing |
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