Abstract

For all imaging techniques, such as optical coherence tomography (OCT), fast imaging speed is always of high demand. Optical computing OCT (${\mathrm{OC}}^2\mathrm{T}$) has achieved ultrahigh speed for real time 3D imaging without post data processing, but its spatial resolution is lowered down due to an imperfect Fourier transformation in the optical computing process. In this Letter, we illustrate the theory of ${\mathrm{OC}}^2\mathrm{T}$ and prove that the dispersion imbalance between reference arm and sample arm may be introduced to improve the resolution. Furthermore, this novel ${\mathrm{OC}}^2\mathrm{T}$ technique can also enable a conjugate restrained OCT imaging without any data processing, achieving $\sim 2$ times higher resolution than typical ${\mathrm{OC}}^2\mathrm{T}$. At an imaging speed of 5M-A-scans per second, the dispersion imbalance ${\mathrm{OC}}^2\mathrm{T}$ has strong ability of restraining the conjugate signal with a conjugate signal rejection ratio of 2.6.

© 2019 Optical Society of America

Optically computed optical coherence tomography for volumetric imaging

Yahui Wang, Qi Kang, Yuanwei Zhang, and Xuan Liu
Opt. Lett. 45(7) 1675-1678 (2020)

Iterative wavefront correction for complex spectral domain optical coherence tomography

Jonas Kanngiesser, Maik Rahlves, and Bernhard Roth
Opt. Lett. 44(6) 1347-1350 (2019)

Computational adaptive optics for optical coherence tomography using multiple randomized subaperture correlations

Dierck Hillmann, Clara Pfäffle, Hendrik Spahr, Sazan Burhan, Lisa Kutzner, Felix Hilge, and Gereon Hüttmann
Opt. Lett. 44(15) 3905-3908 (2019)

Spatial convolution for mirror image suppression in Fourier domain optical coherence tomography

Miao Zhang, Lixin Ma, and Ping Yu
Opt. Lett. 42(3) 506-509 (2017)

Calibration-free time-stretch optical coherence tomography with large imaging depth

Lei Zhang, Liao Chen, Zihui Lei, Yuhua Duan, Chi Zhang, and Xinliang Zhang
Opt. Lett. 44(17) 4135-4138 (2019)