摘要:
The invention provides novel “folded” Mach-Zehnder interferometers (“folded” MZI's), methods for making folded MZI's, and systems and devices incorporating them. The novel folded MZI's are elaborated from conventional MZI structures by cutting across the interferometer arms of a conventional MZI structure and creating reflectors on the exposed ends of the interferometer arms to form two “folded” MZI's from a single conventional Mach-Zehnder interferometer structure. The novel folded MZI's show promise as sensors having a reduced size and enhanced sensitivity relative to sensors incorporating conventional Mach-Zehnder Interferometers.
摘要:
An ultrasound system includes an ultrasound probe configured for sensing and transmitting ultrasound signals. The ultrasound system further includes an optical conduit configured for coupling a light source and an optical detector in an optical path. The optical conduit includes electro-optic modulators configured for modulating optical signals on the optical conduit with at least one of the electrical signals configured to generate corresponding optically modulated analog signals on the optical conduit. In one example, the electro-optic modulators comprise electro-optic polymer modulators.
摘要:
A system and method for optical transmission of ultrasound data signals from a probe to an image processing system is provided. By using a silicon-based optical modulator to encode ultrasound data signals onto an optical signal, an optical transmission link between the ultrasound probe and the image processing system can achieve a high signal to noise ratio with a lower power input.
摘要:
A method of forming a waveguide including a core region, a cladding region, and an index contrast region situated therebetween includes depositing a polymerizable composite on a substrate to form a layer, patterning the layer to define an exposed area and an unexposed area of the layer, irradiating the exposed area of the layer, and volatilizing the uncured monomer to form the waveguide, wherein the polymerizable composite includes a polymer binder and sufficient quantities of an uncured monomer to diffuse into the exposed area of the layer and form the index contrast region. The resulting waveguide includes an index contrast region which has a lower index of refraction than that of the core and cladding regions.
摘要:
A method and system for increasing the coupling efficiency of optical interconnections between optical elements such as optical fibers, waveguides, and vertical cavity surface emitting lasers (VCSEL) in single mode or multimode.
摘要:
An ultrasound system includes an ultrasound probe configured for sensing and transmitting ultrasound signals. The ultrasound system further includes an optical conduit configured for coupling a light source and an optical detector in an optical path. The optical conduit includes electro-optic modulators configured for modulating optical signals on the optical conduit with at least one of the electrical signals configured to generate corresponding optically modulated analog signals on the optical conduit. In one example, the electro-optic modulators comprise electro-optic polymer modulators.
摘要:
An imaging system for generating an image of an object is provided. The imaging system comprises an X-ray source disposed in a spatial relationship to the object configured to transmit X-ray radiation through the object. The system further comprises at least one X-ray detecting media configured to convert the X-ray radiation transmitted through the object to optical signals. In addition, the system comprises an optical transmission conduit comprising a first end and a second end and an optical detector configured to convert optical signals to corresponding electrical signals. The first end of the optical transmission conduit is coupled to the X-ray detection device and the second end coupled to the optical detector.
摘要:
An electromagnetic coupler comprising: a coupling waveguide adapted for receiving input modes along an input axis, propagating coupling modes along a coupling axis, and transmitting output modes along an output axis, the output axis being not parallel to the coupling axis; and an output waveguide disposed adjacent the coupling waveguide and adapted for receiving the output modes.
摘要:
A method for determining deflection of an optical sensor having an optical cavity includes: providing an optical signal including a train of time spaced light pulses, each light pulse including a known set of wavelengths; splitting the optical signal and providing a portion of the optical signal to a reference path; detecting light pulses in the portion of the optical signal; using a remaining portion of the optical signal and interrogating the sensor; receiving a reflected optical signal from the sensor; detecting light pulses in the reflected optical signal; and analyzing the portion of the optical signal and the reflected optical signal to determine the deflection. Corresponding apparatus and computer program products are provided.