Multimodal noncontact photoacoustic and optical coherence tomography imaging using wavelength-division multiplexing.
We present multimodal noncontact photoacoustic (PA) and optical coherence tomography (OCT) imaging. PA signals are acquired remotely on the surface of a specimen with a Mach-Zehnder interferometer. The interferometer is realized in a fiber-optic network using a fiber laser at 1550 nm as the source. In the same fiber-optic network, a spectral-domain OCT system is implemented. The OCT system utilizes a supercontinuum light source at 1310 nm and a spectrometer with an InGaAs line array detector. Light from the fiber laser and the OCT source is multiplexed into one fiber using a wavelength-division multiplexer; the same objective is used for both imaging modalities. Reflected light is spectrally demultiplexed and guided to the respective imaging systems. We demonstrate two-dimensional and three-dimensional imaging on a tissue-mimicking sample and a chicken skin phantom. The same fiber network and same optical components are used for PA and OCT imaging, and the obtained images are intrinsically coregistered.
Thomas
T
Berer
Elisabeth
E
Leiss-Holzinger
Armin
A
Hochreiner
Johannes
J
Bauer-Marschallinger
Andreas
A
Buchsbaum
D000818:Animals; D002645:Chickens; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008954:Models, Biological; D019047:Phantoms, Imaging; D061088:Photoacoustic Techniques / Q000295:instrumentation / Q000379:methods*; D012867:Skin / Q000737:chemistry; D041623:Tomography, Optical Coherence / Q000295:instrumentation / Q000379:methods*