Optimization of piezo-fiber scanning architecture for low voltage/high displacement operation

R. Khayatzadeh, F. Çivitci, O. Ferhanoğlu

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Piezo-based fiber scanning probes have emerged as low-cost and compact tools for various optical imaging modalities, allowing access to tissue sites that are hard to reach. These instruments exploit scanning of a fiber optic cable via a piezoelectric element, which is driven at the mechanical resonance of the extended fiber piece. However, the dynamics of the piezo-scanning structure is often neglected, resulting in an inefficient electromechanical conversion. This work presents a methodology, together with experimental evidence, to collectively optimize the geometries of the piezo-scanner and the extended fiber optic cable to achieve maximum displacement for a given drive voltage. Our findings suggest that matching the individual resonances of the fiber optics cable and the piezo-scanner alone, leads to optimum electromechanical conversion efficiency. Simulations, circuit model, and experimental results reveal more than x2 improvement in the achieved fiber displacement when piezo and fiber resonances are matched, as opposed to the unmatched (i.e., when piezo element length is varied approximately by ±20% from its optimal value) case. Besides offering lower power consumption for the actuation of the piezo-element, our findings paves the way for safer (electric shock-free) minimally-invasive procedures using the piezo-based fiber scanning probes, which is crucial for patient safety.

Original languageEnglish (US)
Pages (from-to)21-27
Number of pages7
JournalSensors and Actuators, A: Physical
Volume255
DOIs
StatePublished - Mar 1 2017
Externally publishedYes

Keywords

  • Confocal microscopy
  • Endoscopic device
  • Fiber optics
  • Piezo-fiber scanning

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Optimization of piezo-fiber scanning architecture for low voltage/high displacement operation'. Together they form a unique fingerprint.

Cite this