Multifiber angular compounding optical coherence tomography for speckle reduction

• Main Authors: Cui, Dongyao, Bo, En, Luo, Yuemei, Liu, Xinyu, Wang, Xianghong, Chen, Si, Yu, Xiaojun, Chen, Shi, Shum, Ping, Liu, Linbo
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2017
• Subjects: Optical coherence; Three-channel spectrometer
• Online Access: https://hdl.handle.net/10356/83120; http://hdl.handle.net/10220/42414
• Institution: Nanyang Technological University

We report on an integrated fiber optic design to implement multifiber angular compounding optical coherence tomography, which enables angular compounding for speckle reduction. A multi-facet fiber array delivers three light beams to the sample with different incident angles. Back-reflective/back-scattered signals from these channels were simultaneously detected by a three-channel spectrometer. The axial and lateral resolution was measured to be ∼3 ∼3 and ∼3.5 μm ∼3.5 μm , respectively, in air with ∼100 dB ∼100 dB sensitivity. We conducted ex vivo experiments on a rat esophagus to demonstrate a contrast to noise improvement of 1.58.