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Proceedings Paper

Improvement of axial resolution for optical coherence tomography using a synthesized light source
Author(s): Manabu Sato; Ichiro Wakaki; Yuuki Watanabe; Naohiro Tanno
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Paper Abstract

We demonstrated that a synthesized light source (SLS) consisting of two low coherence light sources is capable of enhancing spatial resolution in optical coherence tomography (OCT). The axial resolution of OCT is given by the half of coherence length of the light source. We fabricated an SLS with a coherence length of 2.3 μm and the side lobe intensity of 29% under the intensity ratio of LED 1: LED 2 = 1: 0.4 by combining two light sources, LED 1 with a central wavelength of 700 nm and spectral bandwidth of 100 nm, and LED 2 of 898 nm and 85 nm. The coherence length of 2.3 μm is 56% of the shorter coherence length in two LED's, therefore the axial resolution is 1.2 μm.

Paper Details

Date Published: 21 October 2004
PDF: 8 pages
Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); doi: 10.1117/12.583033
Show Author Affiliations
Manabu Sato, Yamagata Univ. (Japan)
Ichiro Wakaki, Yamagata Univ. (Japan)
Yuuki Watanabe, Yamagata Univ. (Japan)
Naohiro Tanno, Yamagata Univ. (Japan)
Japan Science and Technology Corp. (Japan)

Published in SPIE Proceedings Vol. 5581:
ROMOPTO 2003: Seventh Conference on Optics
Valentin I. Vlad, Editor(s)

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