TY - GEN
T1 - Space-time division multiplexing-based superfast spectral-domain optical coherence tomography up to 1 MHz A-scan rate
AU - Seong, Daewoon
AU - Jeon, Deokmin
AU - Wijesinghe, Ruchire Eranga
AU - Park, Kibeom
AU - Kim, Hyeree
AU - Lee, Euimin
AU - Jeon, Mansik
AU - Kim, Jeehyun
N1 - Publisher Copyright:
© 2022 SPIE.
PY - 2022
Y1 - 2022
N2 - Optical coherence tomography (OCT) is a high-resolution and non-invasive internal structural imaging technique. Since the first introduction of OCT, it has been widely studied to enhance the scanning speed of the system to enhance the applicability. Spectral-domain OCT (SD-OCT) is one of the representative types of Fourier-domain OCT, which consisted with lower prices than swept-source OCT and offers higher axial resolution, but there are limited hardware performance to improve the scanning speed. In this paper, we introduced the space-time division multiplexing (STDM) method-based superfast SD-OCT with 1 MHz A-scan rate. In terms of the time-division method, dual-cameras were implemented in a single spectrometer to reduce the alignment error between each camera and fully utilize the operating time of camera by remove the dead time. In addition, the path length difference of the two-sample arm is accurately controlled to utilize the space-division method. By concurrently integrating the time- and space-division methods in STDM with GPU parallel computing, 32 volume/sec was acquired. The quantitative evaluation of the performance of STDM-OCT was analyzed with sensitivity roll-off and image quality comparison measured at different depth. The proposed STDM-OCT is able to enlarge the application of OCT including biomedical research areas, which require a high-speed scanning system.
AB - Optical coherence tomography (OCT) is a high-resolution and non-invasive internal structural imaging technique. Since the first introduction of OCT, it has been widely studied to enhance the scanning speed of the system to enhance the applicability. Spectral-domain OCT (SD-OCT) is one of the representative types of Fourier-domain OCT, which consisted with lower prices than swept-source OCT and offers higher axial resolution, but there are limited hardware performance to improve the scanning speed. In this paper, we introduced the space-time division multiplexing (STDM) method-based superfast SD-OCT with 1 MHz A-scan rate. In terms of the time-division method, dual-cameras were implemented in a single spectrometer to reduce the alignment error between each camera and fully utilize the operating time of camera by remove the dead time. In addition, the path length difference of the two-sample arm is accurately controlled to utilize the space-division method. By concurrently integrating the time- and space-division methods in STDM with GPU parallel computing, 32 volume/sec was acquired. The quantitative evaluation of the performance of STDM-OCT was analyzed with sensitivity roll-off and image quality comparison measured at different depth. The proposed STDM-OCT is able to enlarge the application of OCT including biomedical research areas, which require a high-speed scanning system.
KW - Highspeed industrial inspection
KW - Parallel processing
KW - Space-division multiplexing
KW - Spectral-domain optical coherence tomography
KW - Superfast optical imaging system
UR - http://www.scopus.com/inward/record.url?scp=85131223164&partnerID=8YFLogxK
U2 - 10.1117/12.2608236
DO - 10.1117/12.2608236
M3 - Conference contribution
AN - SCOPUS:85131223164
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Frontiers in Ultrafast Optics
A2 - Herman, Peter R.
A2 - Osellame, Roberto
A2 - Ben-Yakar, Adela
PB - SPIE
T2 - Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXII 2022
Y2 - 20 February 2022 through 24 February 2022
ER -