Phase and amplitude correction in polygon tunable laser-based optical coherence tomography

Jinyu Fan; Pinghe Wang; Feng Gao; Zhehao Hu; Wen Kong; Haiwen Li; Guohua Shi

doi:10.1117/1.JBO.22.9.096013

23 September 2017 Phase and amplitude correction in polygon tunable laser-based optical coherence tomography

Jinyu Fan, Pinghe Wang, Feng Gao, Zhehao Hu, Wen Kong, Haiwen Li, Guohua Shi

Author Affiliations +

Journal of Biomedical Optics, Vol. 22, Issue 9, 096013 (September 2017). https://doi.org/10.1117/1.JBO.22.9.096013

Abstract

Phase instability is a serious problem in swept-source optical coherence tomography (OCT) with polygon tunable lasers; however, these devices have additional issues. We found that polygon tunable lasers also have fluctuations in output power and sweep range: the former creates artifacts that may impair the recognition of sample information, and the latter reduces the interference signal utilization during phase correction. We demonstrate a method that uses the calibration signal to quantify these problems and improve system stability and image quality. The proposed amplitude correction and phase correction methods are used to eliminate vertical artifacts and improve the resolution of OCT flow and intensity images while reducing the phase error.

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Jinyu Fan, Pinghe Wang, Feng Gao, Zhehao Hu, Wen Kong, Haiwen Li, and Guohua Shi "Phase and amplitude correction in polygon tunable laser-based optical coherence tomography," Journal of Biomedical Optics 22(9), 096013 (23 September 2017). https://doi.org/10.1117/1.JBO.22.9.096013

Received: 21 December 2016; Accepted: 23 August 2017; Published: 23 September 2017

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KEYWORDS

Optical coherence tomography

Tunable lasers

Signal to noise ratio

Mirrors

Image resolution

Interference (communication)

Doppler effect

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