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.
© 2012 Optical Society of America
Original Manuscript: February 17, 2012
Revised Manuscript: May 5, 2012
Manuscript Accepted: July 17, 2012
Published: August 20, 2012
Vol. 7, Iss. 10 Virtual Journal for Biomedical Optics
Wen-Chuan Kuo, Yune-Shee Lai, Chih-Ming Lai, and Yi-Shiang Huang, "Balanced detection spectral domain optical coherence tomography with a multiline single camera for signal-to-noise ratio enhancement," Appl. Opt. 51, 5936-5940 (2012)