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Journal of Biomedical Optics

Calibration and characterization protocol for spectral-domain optical coherence tomography using fiber Bragg gratings
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Paper Abstract

We present a calibration protocol to obtain the alignment factors of a custom-made spectrometer and the nonlinear fitting function between the measured CCD pixel domain and the wavelength domain to apply to the spectral-domain optical coherence tomography (SD-OCT) using fiber Bragg gratings. We have used five gratings with different center wavelengths covering the broadband source spectral range. All have a narrow spectral bandwidth (0.05 nm) and the same reflectivity (92%) to calibrate and align the custom-made spectrometer. The implemented SD-OCT system following the proposed protocol showed the alignment factors as 44.37 deg incident angle, 53.11 deg diffraction angle, and 70.0-mm focal length. The spectral resolution of 0.187 nm was recalculated from the alignment factors.

Paper Details

Date Published: 1 March 2011
PDF: 4 pages
J. Biomed. Opt. 16(3) 030501 doi: 10.1117/1.3552602
Published in: Journal of Biomedical Optics Volume 16, Issue 3
Show Author Affiliations
Tae Joong Eom, Gwangju Institute of Science and Technology (Korea, Republic of)
Yeh-Chan Ahn, Pukyong National Univ. (Korea, Republic of)
Chang-Seok Kim, Pusan National Univ. (Korea, Republic of)
Zhongping Chen, Beckman Laser Institute and Medical Clinic (United States)


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