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All-optical optoacoustic microscope based on wideband pulse interferometry.

Opt. Lett. 41, 1953-1956 (2016)
Postprint DOI
Open Access Green
Optical and optoacoustic (photoacoustic) microscopy have been recently joined in hybrid implementations that resolve extended tissue contrast compared to each modality alone. Nevertheless, the application of the hybrid technique is limited by the requirement to combine an optical objective with ultrasound detection collecting signal from the same micro-volume. We present an all-optical optoacoustic microscope based on a pi-phase-shifted fiber Bragg grating (π-FBG) with coherence-restored pulsed interferometry (CRPI) used as the interrogation method. The sensor offers an ultra-small footprint and achieved higher sensitivity over piezoelectric transducers of similar size. We characterize the spectral bandwidth of the ultrasound detector and interrogate the imaging performance on phantoms and tissues. We show the first optoacoustic images of biological specimen recorded with π-FBG sensors. We discuss the potential uses of π-FBG sensors based on CRPI.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Resolution Photoacoustic Microscopy; Fiber Sensors; Ultrasound; Tomography; Phase
ISSN (print) / ISBN 0146-9592
e-ISSN 1539-4794
Journal Optics Letters
Quellenangaben Volume: 41, Issue: 9, Pages: 1953-1956 Article Number: , Supplement: ,
Publisher Optical Society of America (OSA)
Publishing Place Washington
Reviewing status Peer reviewed