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Open Access Green as soon as Postprint is submitted to ZB.
Intravital hybrid optical-optoacoustic microscopy based on fiber-Bragg interferometry.
Proc. SPIE 10494:104942M (2018)
Downloading of the abstract is permitted for personal use only. Optoacoustic microscopy (OAM) has enabled high-resolution, label-free imaging of tissues at depths not achievable with purely optical microscopy. However, widespread implementation of OAM into existing epi-illumination microscopy setups is often constrained by the performance and size of the commonly used piezoelectric ultrasound detectors. In this work, we introduce a novel acoustic detector based on a π-phase-shifted fiber Bragg grating (π-FBG) interferometer embedded inside an ellipsoidal acoustic cavity. The cavity enables seamless integration of epi-illumination OAM into existing microscopy setups by decoupling the acoustic and optical paths between the microscope objective and the sample. The cavity also acts as an acoustic condenser, boosting the sensitivity of the π-FBG and enabling cost effective CW-laser interrogation technique. We characterize the sensor's sensitivity and bandwidth and demonstrate hybrid OAM and second-harmonic imaging of phantoms and mouse tissue in vivo.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Fiber Bragg- Grating ; Fiber Detectors ; Medical And Biological Imaging ; Nonlinear Microscopy ; Optoacoustic Microscopy
ISSN (print) / ISBN
0277-786X
e-ISSN
1996-756X
Journal
Proceedings of SPIE
Quellenangaben
Volume: 10494,
Article Number: 104942M
Publisher
SPIE
Reviewing status
Peer reviewed
Institute(s)
Institute of Biological and Medical Imaging (IBMI)