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

Volume

22

Issue

20

fYear

2010

Firstpage

1524

Lastpage

1526

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2055842

Filename

5498950