An integrated and miniaturized dual-frequency enhanced spectrophone was constructed by combining a dual-channel fiber-optic acoustic sensor with a multi-pass excitation structure for
FEMTO-PHOTONICS: OPTICAL TRANSDUCERS UTILIZING NOVEL SUB-WAVELENGTH DUAL LAYER GRATING STRUCTURES Dustin W. Carr, Gregory R. Bogart, Bianca E. N. Keeler
Abstract: A dye-doped polymer based optical fiber transducer is demonstrated for PA-US dual-modality imaging, which exhibits an ultrasound generation efficiency of 0.064MPa mJ -1 cm 2 with a
We propose a nondestructive dual-modal imaging system that utilizes the light absorption contrast of photoacoustic imaging (PAI) and light scattering contrast of optical coherence imaging (OCI).
Leveraging photonic integration and photonic computing acceleration, Lu et al. proposed and demonstrated a scalable integrated silicon photonic processor that enables high-capacity optical
We present an analysis of a three-layered structure used for both launching and detecting picosecond acoustic waves. To enhance the optical
Abstract A literature survey of Optical Current Transducers (OCTs) with particular emphasis on electric power systems measurements has been performed. This report is intended to provide information
Dual-modal PAI/OCI visually identifies surface and internal defects on FPCBs that cannot be detected by the current automatic optical inspection (AOI) system in a manufacturing environment. The PAI/OCI
Ultrasonic dual element transducers consist of two angled piezoelectric elements housed in the same case but separated by an acoustic barrier. While one element excites transient waves
We propose a high-sensitivity compact dual-T-type resonant fiber-optic photoacoustic (DTR-FOPA) sensor for simultaneous detection of two gases. The designed DTR-FOPA sensor
High-resolution sub-millimetre diameter side-viewing all-optical ultrasound transducer based on a single dual-clad optical fibre.
2. Dual-Frequency Transducers The goal of dual-frequency contrast imaging is to form images of only microbubble harmonics by transmitting acoustic
Eliminates delay line multiples for high temperature applications Reduces direct back-scattering noise in coarse grained or scattering materials Combines
A dual element transducer consists of two crystal elements housed in the same case, separated by an acoustic barrier. One element transmits longitudinal waves, and
Microwave-to-optical transduction of single photons will play an essential role in interconnecting future superconducting quantum devices. Various transducers have been developed
Current dual-frequency imaging systems for superharmonic imaging have been used for visualizing tumor microvasculature, with single-element transducers for each of the low- and high-frequency
All-optical ultrasound (OpUS), where ultrasound is both generated and received using light, has emerged as a modality well-suited to highly miniaturised applications. In this work we
Schematic illustration of the all-optical transducer with CNT-PDMS composite film layer and thin-film etalon incorporating two DBRs.
A dual element transducer consists of two crystal elements housed in the same casing, separated by an acoustic barrier. One crystal transmits sound energy
Purpose Photoacoustic (PA) microscopy has emerged as a useful tool in biomedical imaging applications such as visualization of microvasculature
This transducer bridges the sensitivity capability of ultrasound and the high contrast of optical methods in functional photoacoustic tomography. The dual-element transducer enabled multiscale analysis of
This paper presents the design, fabrication and testing of a single-mode fiber optic ultrasound transducer. This transducer can work as an ultrasound
Here, we present a compact microwave-optical transducer based on monolithic integration of piezoelectric actuators on silicon nitride photonic circuits.
ts as a receiver for the echoes produced in the component under test. The main advantages of this type of trans-ducer compared to a single-element pulse-echo probe are a better near-surface resolution
Dual element transducers offer enhanced near-surface resolution, ideal for thickness gauging, corrosion monitoring, and weld/cladding inspections.
In this section the radiation transducers commonly found in hand-held or benchtop optical instruments are described. The list of these devices described in
In this work, we overcome these limitations by using a dual-clad optical fibre (DCF) for light delivery. Additionally, we used micro-optic components to enable ultrasound transmission in a side-viewing
In optical sensing technology, phototransistors are essential components that perform as both photodiodes and bipolar junction transistors (BJTs). Signal
In this article, we present a theoretical study of SPR-based fiber optic sensor by utilizing oxide and polymer over layer upon single metal layer. We have categorized our probe designs in 3 types in
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