Title :
Gas-Cell Referenced Swept Source Phase Sensitive Optical Coherence Tomography
Author :
Kuranov, Roman V. ; McElroy, Austin B. ; Kemp, Nate ; Baranov, Stepan ; Taber, Joe ; Feldman, Marc D. ; Milner, Thomas E.
Author_Institution :
Health Sci. Center, Dept. of Ophthalmology, Univ. of Texas, San Antonio, TX, USA
Abstract :
Distinct reference and signal interferometers in combination with a gas-cell spectral reference are employed to increase sensitivity and environmental stability of a swept source phase-sensitive optical coherence tomography. A displacement sensitivity (DS) of 65 pm at 280-μm depth and DS degradation with depth of 0.0015 rad/mm is achieved. Differential DS of 234 pm in a 127-μm -thick scattering phantom is six-fold superior to previously reported values. DS degradation with a depth of 0.026 rad/mm is reported for tissue-like scattering phantoms. Measured depth-dependent DS suggests that digitization time jitter noise contributes to degradation of phase sensitivity with depth.
Keywords :
biological tissues; biomedical optical imaging; light interferometers; noise; optical tomography; phantoms; timing jitter; displacement sensitivity; gas-cell spectral reference; phase sensitive optical coherence tomography; phase sensitivity; scattering phantom; size 127 mum; swept source; time jitter noise; tissue-like scattering phantoms; Degradation; Imaging phantoms; Interferometers; Noise measurement; Optical interferometry; Optical scattering; Optical sensors; Phase measurement; Stability; Tomography; Biomedical optical imaging; optical coherence tomography (OCT); phase measurements;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2055842
