Improvement of axial resolution for optical coherence tomography using a synthesized light source

Manabu Sato; Ichiro Wakaki; Yuuki Watanabe; Naohiro Tanno

doi:10.1117/12.583033

21 October 2004 Improvement of axial resolution for optical coherence tomography using a synthesized light source

Manabu Sato, Ichiro Wakaki, Yuuki Watanabe, Naohiro Tanno

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Proceedings Volume 5581, ROMOPTO 2003: Seventh Conference on Optics; (2004) https://doi.org/10.1117/12.583033
Event: ROMOPTO 2003: Seventh Conference on Optics, 2003, Constanta, Romania

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.

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Manabu Sato, Ichiro Wakaki, Yuuki Watanabe, and Naohiro Tanno "Improvement of axial resolution for optical coherence tomography using a synthesized light source", Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); https://doi.org/10.1117/12.583033

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