Compact fiber-based multi-photon endoscope working at 1700 nm

Research output: Contribution to journalArticle

Abstract

We present the design, implementation and performance analysis of a compact multi-photon endoscope based on a piezo electric scanning tube. A miniature objective lens with a long working distance and a high numerical aperture (≈ 0: 5) is designed to provide a diffraction limited spot size. Furthermore, a 1700 nm wavelength femtosecond fiber laser is used as an excitation source to overcome the scattering of biological tissues and reduce water absorption. Therefore, the novel optical system along with the unique wavelength allows us to increase the imaging depth. We demonstrate that the endoscope is capable of performing third and second harmonic generation (THG/SHG) and three-photon excitation fluorescence (3PEF) imaging over a large field of view (> 400 µm) with high lateral resolution (2: 2 µm). The compact and lightweight probe design makes it suitable for minimally-invasive in-vivo imaging as a potential alternative to surgical biopsies.

LanguageEnglish (US)
Article number#320649
Pages2326-2335
Number of pages10
JournalBiomedical Optics Express
Volume9
Issue number5
DOIs
StatePublished - May 1 2018

Fingerprint

endoscopes
Endoscopes
Photons
Optical Devices
design analysis
fibers
Optical Imaging
photons
numerical aperture
wavelengths
Lenses
excitation
field of view
fiber lasers
harmonic generations
Lasers
lenses
tubes
Biopsy
fluorescence

Keywords

  • Endoscopic imaging
  • Medical and biological imaging
  • Nonlinear microscopy
  • Ultrafast technology

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics

Cite this

Compact fiber-based multi-photon endoscope working at 1700 nm. / Akhoundi, Farhad; Qin, Yukun; Peyghambarian, Nasser N; Barton, Jennifer K; Kieu, Khanh Q.

In: Biomedical Optics Express, Vol. 9, No. 5, #320649, 01.05.2018, p. 2326-2335.

Research output: Contribution to journalArticle

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