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Optics Letters


  • Vol. 36, Iss. 19 — Oct. 1, 2011
  • pp: 3894–3896

Ultrathin side-viewing needle probe for optical coherence tomography

D. Lorenser, X. Yang, R. W. Kirk, B. C. Quirk, R. A. McLaughlin, and D. D. Sampson  »View Author Affiliations

Optics Letters, Vol. 36, Issue 19, pp. 3894-3896 (2011)

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We present the smallest reported side-viewing needle probe for optical coherence tomography (OCT). Design, fabrication, optical characterization, and initial application of a 30-gauge (outer diameter 0.31 mm ) needle probe are demonstrated. Extreme miniaturization is achieved by using a simple all-fiber probe design incorporating an angle-polished and reflection-coated fiber-tip beam deflector. When inserted into biological tissue, aqueous interstitial fluids reduce the probe’s inherent astigmatism ratio to 1.8, resulting in a working distance of 300 μm and a depth-of-field of 550 μm with beam diameters below 30 μm . The needle probe was interfaced with an 840 nm spectral-domain OCT system and the measured sensitivity was shown to be only 7 dB lower than that of a comparable galvo-scanning sample arm configuration. 3D OCT images of lamb lungs were acquired over a depth range of 600 μm , showing individual alveoli and bronchioles.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(350.3950) Other areas of optics : Micro-optics

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: August 4, 2011
Revised Manuscript: September 5, 2011
Manuscript Accepted: September 6, 2011
Published: September 28, 2011

Virtual Issues
Vol. 6, Iss. 11 Virtual Journal for Biomedical Optics

D. Lorenser, X. Yang, R. W. Kirk, B. C. Quirk, R. A. McLaughlin, and D. D. Sampson, "Ultrathin side-viewing needle probe for optical coherence tomography," Opt. Lett. 36, 3894-3896 (2011)

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