Fourier domain optical coherence tomography with ultralong depth range

• Published in: Frontiers of Optoelectronics (Online) Vol. 8; no. 2; pp. 163 - 169
• Main Authors: Ding, Zhihua, Shen, Yi, Bao, Wen, Li, Peng
• Format: Journal Article
• Language: English
• Published: Beijing Higher Education Press 01.06.2015
• Subjects: Biomedical Engineering and Bioengineering; CT系统; Electrical Engineering; Engineering; OCT; Physics; Research Article; 傅里叶; 光学相干; 典型应用; 断层扫描; 深度分辨率; swept source; parallel imaging; orthogonal dispersion; optical coherence tomography (OCT); virtually-imaged phased array (VIPA); dimensional metrology; light recirculation
• DOI: 10.1007/s12200-015-0463-5
• ISSN: 2095-2759

The depth ranges of typical implementations of Fourier domain optical coherence tomography （FDOCT）, including spectral domain OCT （SDOCT） and swept source OCT （SSOCT）, are limited to several millimeters. To extend the depth range of current OCT systems, two novel systems with ultralong depth range were developed in this study. One is the orthogonal dispersive SDOCT （OD-SDOCT）, and the other is the recirculated swept source （R-SS） interferometer/OCT. No compromise between depth range and depth resolution is required in both systems. The developed OD-SDOCT system realized the longest depth range （over 100 mm） ever achieved by SDOCT, which is ready to be modified for depth-encoded parallel imaging on multiple sites. The developed R-SS interferometer achieved submicron precision within a depth range of 30mm, holding potential in real-time contact-free on-axis metrology of complex optical sys- tems.