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

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.

[1]  Byeong Ha Lee,et al.  Novel Optical Delay Line for Optical Coherence Tomography System , 2003 .

[2]  Lihong V. Wang,et al.  Spectral-domain optical coherence tomography: Removal of autocorrelation using an optical switch , 2006 .

[3]  A. Kersey,et al.  Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry - Perot wavelength filter. , 1993, Optics letters.

[4]  S. Yun,et al.  Phase-resolved optical frequency domain imaging. , 2005, Optics express.

[5]  Zhilin Hu,et al.  Fourier domain optical coherence tomography with a linear-in-wavenumber spectrometer. , 2007, Optics letters.

[6]  S. Yun,et al.  Real-time fiber-based multi-functional spectral-domain optical coherence tomography at 1.3 microm. , 2005, Optics express.

[7]  C. Hitzenberger,et al.  High speed spectral domain polarization sensitive optical coherence tomography of the human retina. , 2005, Optics express.

[8]  K. Hill,et al.  An all-fiber dense wavelength-division multiplexer/demultiplexer using photoimprinted Bragg gratings , 1995, IEEE Photonics Technology Letters.

[9]  Hua-Jun He,et al.  Procedures for Wavelength Calibration and Spectral Response Correction of CCD Array Spectrometers , 2009, Journal of research of the National Institute of Standards and Technology.

[10]  Jun Zhang,et al.  High-Speed and Wide Bandwidth Fourier Domain Mode-locked Wavelength Swept Laser with Multiple SOAs , 2007, 2007 Conference on Lasers and Electro-Optics - Pacific Rim.

[11]  F Ouellette,et al.  Passive temperature-compensating package for optical fiber gratings. , 1995, Applied optics.