Focusing and scanning light through a multimode optical fiber using digital phase conjugation

Opt Express. 2012 May 7;20(10):10583-90. doi: 10.1364/OE.20.010583.


We demonstrate for the first time to our knowledge a digital phase conjugation technique for generating a sharp focus point at the end of a multimode optical fiber. A sharp focus with a contrast of 1800 is experimentally obtained at the tip of a 105 μm core multimode fiber. Scanning of the focal point is also demonstrated by digital means. Effects from illumination and fiber bending are addressed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Crystallization
  • Endoscopy / methods
  • Equipment Design
  • Fiber Optic Technology
  • Holography / methods
  • Lasers
  • Light
  • Lighting
  • Nephelometry and Turbidimetry
  • Optical Fibers*
  • Optics and Photonics / methods*