title: Calibration and characterization protocol for spectral-domain optical coherence tomography using fiber Bragg gratings.
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.
authors: Tae Joong
authors: TJ
authors: Eom
authors: Yeh-Chan
authors: YC
authors: Ahn
authors: Chang-Seok
authors: CS
authors: Kim
authors: Zhongping
authors: Z
authors: Chen
mesh_terms: D002138:Calibration; D004867:Equipment Design; D005583:Fourier Analysis; D055620:Optical Phenomena; D041623:Tomography, Optical Coherence / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data