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Journal of Biomedical Optics

Simultaneous dual-band optical coherence tomography for endoscopic applications
Author(s): Jianbing Xu; Luoqin Yu; Xiaoming Wei; Xie Wang; Po-Ching Chui; Kin Tak Chan; Edmund Y. Lam; Nikki P. Lee; Kenneth K. Y. Wong
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Paper Abstract

Dual-band optical coherence tomography (OCT) can greatly enhance the imaging contrast with potential applications in functional (spectroscopic) analysis. A new simultaneous dual-band Fourier domain mode-locked swept laser configuration for dual-band OCT is reported. It was based on a custom-designed dual-channel driver to synchronize two different wavelength bands at 1310 and 1550 nm, respectively. Two lasing wavelengths were swept simultaneously from 1260 to 1364.8 nm for the 1310-nm band and from 1500 to 1604 nm for the 1550-nm band at an A-scan rate of 45 kHz. Broadband wavelength-division multiplexing was utilized to couple two wavelength bands into a common catheter for circumferential scanning to form dual-band OCT. The proposed dual-band OCT scheme was applied to endoscopic OCT imaging of mouse esophageal wall <italic<ex vivo</italic< and human fingertip <italic<in vivo</italic< to justify the feasibility of the proposed imaging technique. The proposed dual-band OCT system is fast and easy to be implemented, which allows for <italic<in vivo</italic< high-speed biomedical imaging with potential applications in spectroscopic investigations for endoscopic imaging.

Paper Details

Date Published: 9 December 2014
PDF: 6 pages
J. Biomed. Opt. 19(12) 126007 doi: 10.1117/1.JBO.19.12.126007
Published in: Journal of Biomedical Optics Volume 19, Issue 12
Show Author Affiliations
Jianbing Xu, The Univ. of Hong Kong (China)
Luoqin Yu, The Univ. of Hong Kong (China)
Xiaoming Wei, The Univ. of Hong Kong (China)
Xie Wang, The Univ. of Hong Kong (China)
Po-Ching Chui, The Univ. of Hong Kong (China)
Kin Tak Chan, The Univ. of Hong Kong (China)
Edmund Y. Lam, The Univ. of Hong Kong (China)
Nikki P. Lee, The Univ. of Hong Kong (China)
Kenneth K. Y. Wong, The Univ. of Hong Kong (China)


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