We demonstrate a digital phase conjugation technique for generating a sharp focus point at the end of a multimode optical fiber. A sharp focus is experimentally obtained at the distal end of a 200μm core multimode fiber. By recording the digital holograms for different excitation conditions, the sharp focus can be digitally scanned over a 175μm diameter regular grid. The demonstrated technique is used for high resolution scanning lensless imaging based on multimode fibers, of stained biological samples that can enable diagnosis from the investigation of cellular phenotype.

Date Published: 20 March 2013
PDF: 7 pages
Proc. SPIE 8576, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIII, 857603 (20 March 2013); doi: 10.1117/12.2001605

Published in SPIE Proceedings Vol. 8576:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIII
Israel Gannot, Editor(s)