Signal-to-Noise Ratio Enhanced Spectral Domain Optical Coherence Tomography with Dual-balanced Detection. (2016)

• Record Type: Journal Article
• Authors: Bo, En; Liu, Xinyu; Liu, Linbo
• Is Part Of: Procedia engineering. Volume 140(2016)
• Page Start: 140
• Page End: 143
• Publication Date: 2016
• Subjects: Optical coherence tomography -- Optical and biomedical imaging -- Medical optics instrumentation -- Dual-balanced detection; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.07.358
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Spectral domain optical coherence tomography (SD-OCT) with dual-balanced detection (DBD) for signal-to-noise ratio (SNR) enhancement is developed. The dual-balanced detection in the SD-OCT system inherently achieves two-fold increase of the interested signal amplitude, minimizes the common background noise and suppresses artifacts by combining two phase-opposed interferometric spectra obtained simultaneously in comparison to unbalanced detection configuration, resulting in a significant SNR increase and dc elimination performance. Two interferometric spectrum were captured using a dual-line CCD through the same spectrometer optics. This new design is of lower cost compared with the dual CCD design. The feasibility and validity of this SD-OCT system with dual-balanced detection are demonstrated by experimental measurement of a 95% reflector.