Abstract
For all imaging techniques, such as optical coherence tomography (OCT), fast imaging speed is always of high demand. Optical computing OCT () 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 and prove that the dispersion imbalance between reference arm and sample arm may be introduced to improve the resolution. Furthermore, this novel technique can also enable a conjugate restrained OCT imaging without any data processing, achieving times higher resolution than typical . At an imaging speed of 5M-A-scans per second, the dispersion imbalance has strong ability of restraining the conjugate signal with a conjugate signal rejection ratio of 2.6.
© 2019 Optical Society of America
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