Spectrally-sampled OCT for sensitivity improvement from limited optical power.
Although high optical illumination power is favored in optical coherence tomography (OCT) for better signal-to-noise ratio, optical power is often limited by a damaged threshold for biomedical living tissues and autocorrelation signals observed in tomograms. In order to improve signal sensitivity without increasing the optical illumination power, a spectrally sampled multi-wavelength light source is proposed for the OCT system. A fiber Sagnac comb filter was used to spectrally sample the output of a continuous spectral light source. Point spread function analysis shows that the spectrally sampled OCT has an almost 50% dynamic range improvement in comparison with a conventional continuous spectral light source OCT for the same average optical power of 6 mW.
Jung
Eun Joo
EJ
Department of Nanosystem Engineering, Pusan National University, Busan, Korea.
Park
Jae-Seok
JS
Jeong
Myung Yung
MY
Kim
Chang-Seok
CS
Eom
Tae Joong
TJ
Yu
Bong-Ahn
BA
Gee
Sangyoun
S
Lee
Jongmin
J
Kim
Moon Ki
MK