Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Optimal wavelength for ultrahigh-resolution optical coherence tomography

Open Access Open Access

Abstract

The influence of depth dependent dispersion by the main component of biological tissues, water, on the resolution of OCT was studied. Investigations showed that it was possible to eliminate the influence of depth dependent dispersion by water in tissue by choosing a light source with a center wavelength near 1.0 µm. Ultrahigh resolution ophthalmic imaging was performed at this wavelength range with a microstructure fiber light source.

©2003 Optical Society of America

Full Article  |  PDF Article
More Like This
Ultrahigh-resolution optical coherence tomography by broadband continuum generation from a photonic crystal fiber

Yimin Wang, Yonghua Zhao, J. S. Nelson, Zhongping Chen, and Robert S. Windeler
Opt. Lett. 28(3) 182-184 (2003)

Ultrahigh resolution Fourier domain optical coherence tomography

R. A. Leitgeb, W. Drexler, A. Unterhuber, B. Hermann, T. Bajraszewski, T. Le, A. Stingl, and A. F. Fercher
Opt. Express 12(10) 2156-2165 (2004)

Ultrahigh-resolution optical coherence tomography using continuum generation in an air–silica microstructure optical fiber

I. Hartl, X. D. Li, C. Chudoba, R. K. Ghanta, T. H. Ko, J. G. Fujimoto, J. K. Ranka, and R. S. Windeler
Opt. Lett. 26(9) 608-610 (2001)

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (5)

Fig. 1.
Fig. 1. Chromatic dispersion of water. Triangles: experimental result; solid line: calculated result.
Fig. 2.
Fig. 2. Broadening effect for different OCT resolutions. K is the ratio of coherence length with and without water dispersion. Dashed line: 800 nm light source; solid line: 1.3 µm light source.
Fig. 3.
Fig. 3. Broadening of autocorrelation function when light passes through water sample. The light sources are at 940 nm and 1.32 µm.
Fig. 4.
Fig. 4. Calculated broadening effects for broadband light sources at center wavelengths of 0.8, 1.0, and 1.3 µm, respectively. The bandwidths were chosen such that the longitudinal resolution was maintained at 1.0 µm.
Fig. 5.
Fig. 5. High resolution ophthalmic imaging. (a) Cornea: image size 0.3×0.2 mm; Ep, epithelium; C.S., corneal stroma. (b) Anterior chamber of eye: image size 3.0×1.74 mm; En, endothelium; A.H., aqueous humor; C, conjunctiva; L, lens; I1, interface between epithelium and stroma; I2, interface between endothelium and A.H.; I3, Interface between A.H. and lens. (c) Interference peaks at line A-A in (b).

Tables (1)

Tables Icon

Table 1. Broadening ratio K at different imaging depth

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

σ t = σ t 0 { 1 + [ d 2 ϕ ( ω ) d ω 2 ] 2 σ ω 4 } 1 2
K = σ t σ to
D = ω 0 2 2 π z c d 2 ϕ ( ω ) d ω 2
Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved