Correlated Doppler optical coherence tomography

Huang, Liangmin; Ding, Zhihua; Wang, Hong; Wang, Chuan

doi:10.7498/aps.61.023401

Acta Phys. Sin.

2012

DOI: 10.7498/aps.61.023401

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Correlated Doppler optical coherence tomography

Liangmin Huang¹,

Zhihua Ding²,

Hong Wang³

et al.

Abstract: A new method based cross-correlation technique (CD-OCT) is proposed to acquire and analyse the information about flow velocity with low signal-to-noise ratio(SNR) in spectral-domain optical coherence tomography(SD-OCT). We theoretically study the procedure of this method, and analyse the correlation between the noises by computer simulation and experiment. The Doppler flow images reconstructed by CD-OCT are compared with those reconstructed by Joint spectral and time-domain optical coherence tomography (STD-OC… Show more

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Cited by 8 publications

References 22 publications

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Fiber Fabry-Perot tunable filter based Fourier domain mode locking swept laser source

Chen¹,

Ding²,

Wang³

et al. 2013

Acta Phys. Sin.

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An all-fiber Fourier domain mode locking (FDML) swept laser source at 1300 nm for swept source optical coherence tomography is reported. The swept laser source is realized with power amplification and laser resonator which includes gain medium, tunable filter and dispersion managed delay line. FDML swept laser can realize high-speed tuning, and phase is stable since its highly stable mode locking operation. The turning range of fiber Fabry-Perot tunable filter (FFP-TF) based FDML swept laser is 130 nm, and the 3 dB bandwidth is 70 nm with an average output power of 11 mW. The tunable speed of FDML laser is 48.12 kHz compared with 8 kHz of short-cavity FFP-TF based swept laser. The axial resolution in OCT imaging of FDML swept laser is 7.8 μm (in tissue), which is improved by 1.9 μm compared with that of short-cavity swept laser.

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Fiber Fabry-Perot tunable filter based Fourier domain mode locking swept laser source

Chen¹,

Ding²,

Wang³

et al. 2013

Acta Phys. Sin.

View full text Add to dashboard Cite

show abstract

Application of amplitude and phase registration in blood flow imaging using optical coherence tomography

et al. 2013

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The amplitude and phase fluctuations of A-scans, influenced by the galvanometer positioning accuracy, mechanical jitter, and especially the ovement of the sample, may lead to the distortion and degradation of the tissue structure images and the blood flow images within tissue beds in frequency domain optical coherence tomography. The amplitude registration method for A-scans is proposed based on the minimum intensity difference matching criterion, Lorentzian curve fitting method, and compensation of the optical path difference in interference spectrum. The phase differences between A-scans are detected and registered by matching of phase distribution characteristics of A-scans. After the amplitude and phase registration, the complex signal differences between two A-scans are calculated to eliminate the effect of the static tissue on the blood flow imaging. The eye scanning experiments were performed and three-dimensional blood flow images of retina were acquired. Experiment results indicate that the effect of system scanning accuracy and tissue movement on the image quality can be effectively eliminated by the proposed amplitude and phase registration method. The fast and accurate phase registration method can also be used in Doppler OCT, phase microscope, and other phase related applications.

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Joint spectral and depth domain spectral domain phase microscopy

Yan¹,

Zhihua²,

Wang³

et al. 2013

Acta Phys. Sin.

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We present a joint spectral and depth domain spectral domain phase microscopy for high-sensitive and high-dynamic-range quantitative phase imaging, where phase information retrieved in spectral domain is used to overcome the limitation of 2π ambiguity and phase information in depth domain is used to achieve a high phase sensitivity. By theoretical derivation and simulation, the sensitivity advantage of phase information in depth domain over phase information in spectral domain is investigated. The theoretical derivation of joint spectral and depth domain spectral domain phase microscopy is presented in detail. The performance of the proposed joint spectral and depth domain spectral domain phase microscopy is illustrated by phase imaging of a coverslip and a resolution target.

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Correlated Doppler optical coherence tomography

Cited by 8 publications

References 22 publications

Fiber Fabry-Perot tunable filter based Fourier domain mode locking swept laser source

Fiber Fabry-Perot tunable filter based Fourier domain mode locking swept laser source

Application of amplitude and phase registration in blood flow imaging using optical coherence tomography

Joint spectral and depth domain spectral domain phase microscopy

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