Towards new applications using capillary waveguides

Nicolino Stasio, Atsushi Shibukawa, Ioannis N. Papadopoulos, Salma Farahi, Olivier Simandoux, Jean Pierre Huignard, Emmanuel Bossy, Christophe Moser, Demetri Psaltis

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


In this paper we demonstrate the enhancement of the sensing capabilities of glass capillaries. We exploit their properties as optical and acoustic waveguides to transform them potentially into high resolution minimally invasive endoscopic devices. We show two possible applications of silica capillary waveguides demonstrating fluorescence and optical-resolution photoacoustic imaging using a single 330 μm-thick silica capillary. A nanosecond pulsed laser is focused and scanned in front of a capillary by digital phase conjugation through the silica annular ring of the capillary, used as an optical waveguide. We demonstrate optical-resolution photoacoustic images of a 30 μm-thick nylon thread using the water-filled core of the same capillary as an acoustic waveguide, resulting in a fully passive endoscopic device. Moreover, fluorescence images of 1.5 μm beads are obtained collecting the fluorescence signal through the optical waveguide. This kind of silica-capillary waveguide together with wavefront shaping techniques such as digital phase conjugation, paves the way to minimally invasive multi-modal endoscopy.

Original languageEnglish
Article number248264
Pages (from-to)4619-4631
Number of pages13
JournalBiomedical Optics Express
Issue number12
Publication statusPublished - Nov 2 2015
Externally publishedYes


  • Digital holography
  • Endoscopic imaging
  • Fiber optics imaging
  • Phase conjugation

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics


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