Balanced detection spectral domain optical coherence tomography with a multiline single camera for signal-to-noise ratio enhancement.
In this study, the use and advantages of balanced detection (BD) in spectral domain optical coherence tomography (SD-OCT) are demonstrated. A-scans are calculated as a combination of two phase-opposed interferometric spectra acquired simultaneously by using a multiline single camera spectrometer. Not only does this system suppress artifacts due to autocorrelation, but also the signal of interest is increased by a factor of 2 as experimentally verified. Our BD-based SD-OCT gives a signal-to-noise ratio improvement of 8-14 dB for the peak within 1 mm compared to standard SD-OCT using a single detection scheme. This method is validated by experimental measurement of a glass plate.
Institute of Biophotonics, National Yang-Ming University, Taiwan. wckuo@ym.edu.tw
Wen-Chuan
WC
Kuo
Yune-Shee
YS
Lai
Chih-Ming
CM
Lai
Yi-Shiang
YS
Huang
D000465:Algorithms; D004867:Equipment Design; D005583:Fourier Analysis; D007368:Interferometry / Q000379:methods; D013053:Spectrophotometry / Q000379:methods; D041623:Tomography, Optical Coherence / Q000295:instrumentation* / Q000379:methods*