Photonic compressive sensing enabled data efficient time stretch optical coherence tomography

Chaitanya K. Mididoddi; Chao Wang

doi:10.1117/12.2283035

5 March 2018 Photonic compressive sensing enabled data efficient time stretch optical coherence tomography

Chaitanya K. Mididoddi, Chao Wang

Proceedings Volume 10591, 2nd Canterbury Conference on OCT with Emphasis on Broadband Optical Sources; 105910F (2018) https://doi.org/10.1117/12.2283035
Event: Second Canterbury Conference on Optical Coherence Tomography, 2017, Canterbury, United Kingdom

Abstract

Photonic time stretch (PTS) has enabled real time spectral domain optical coherence tomography (OCT). However, this method generates a torrent of massive data at GHz stream rate, which requires capturing as per Nyquist principle. If the OCT interferogram signal is sparse in Fourier domain, which is always true for samples with limited number of layers, it can be captured at lower (sub-Nyquist) acquisition rate as per compressive sensing method. In this work we report a data compressed PTS-OCT system based on photonic compressive sensing with 66% compression with low acquisition rate of 50MHz and measurement speed of 1.51MHz per depth profile. A new method has also been proposed to improve the system with all-optical random pattern generation, which completely avoids electronic bottleneck in traditional binary pseudorandom binary sequence (PRBS) generators.

Citation Download Citation

Chaitanya K. Mididoddi and Chao Wang "Photonic compressive sensing enabled data efficient time stretch optical coherence tomography", Proc. SPIE 10591, 2nd Canterbury Conference on OCT with Emphasis on Broadband Optical Sources, 105910F (5 March 2018); https://doi.org/10.1117/12.2283035

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KEYWORDS

Compressed sensing

Optical coherence tomography

Photodetectors

Signal detection

Dispersion

Binary data

Integrated optics

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