期刊
JOURNAL OF BIOPHOTONICS
卷 2, 期 6-7, 页码 357-363出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jbio.200910028
关键词
optical coherence tomography; tunable lasers; Fourier domain mode locking; optical frequency domain imaging
资金
- German Research Foundation [DFG-HU 1006/2-1]
- European Union project FUN OCT (FP7 HEALTH) [201880]
We report on recent progress in Fourier domain mode-locking (FDML) technology. The paper focuses on developments beyond pushing the speed of these laser sources. After an overview of improvements to FDML over the last three years, a brief: analysis of OCT imaging using FDML lasers with different wavelengths is presented, For the first time, high speed, high quality FDML imaging at 1550 nm is presented and compared to a system at 1310 nm. The imaging results of human skin for both wavelengths are compared and analyzed. Sample arm optics, power on the sample, heterodyne, gain, detection bandwidth, colour cut levels and sample location have been identical to identify the influence of difference in scattering and water absorption. The imaging performance at 1310 nm in human skin is only slightly better and the results suggest that water absorption only marginally affects the penetration depth in human skin at 1550 nm. For several applications this wavelength may be preferred. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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