摘要:
An all-optical fiber sensor apparatus includes a light source and an in-line fiber polarizer that polarizes light received from the light source. The in-line fiber polarizer outputs light in a first polarization state which is directed to a polarization-maintaining fiber. After receiving the light in a first polarization state, the polarization-maintaining fiber transmits the light such that the light exits as light in a second polarization state. During measurements, the polarization-maintaining fiber contacts a test sample. A compression device compresses the test sample. The compression device applies a time varying force to the test sample in which the force is sequentially increased. A polarimeter receives the light in a second polarization state and outputs polarization state data for the light in a second polarization state. Finally, a data processor is in communication with the polarimeter to receive and stores the polarization state data.
摘要:
In one embodiment, an on-chip electronic-plasmonic transducer is provided that is capable of both direct plasmon generation and detection at high efficiencies. The electronic-plasmonic transducer includes a metal-insulator-metal junction formed from a first wire constructed of a first metal, a tunneling barrier material in contact with the first wire, and a second wire made from a second metal in contact with the tunneling barrier material. A plasmonic waveguide is formed as a contiguous part of the second wire, such that the waveguide is directly coupled to the MIM junction. The electronic-plasmonic transducer can both directly generate and detect plasmons, such that it may be configured on-chip as either a plasmon source or a plasmon detector. The electronic-plasmonic transducer may be used to form an on-chip plasmon-based frequency multiplier or plasmon amplifier, among other usages.
摘要:
There is provided a semi-circular resonator using a whispering gallery mode (WGM) and an optical sensor using the same. Accordingly, an active region that is a waveguide of an active layer in which laser oscillation is caused by gains of advancing beams is deeply etched in a semi-circular or semi-ring shape.
摘要:
Techniques and devices for measuring polarization crosstalk in polarization maintaining fiber by placing the PM fiber in a 1-dimensional or 2-dimensional configuration for sensing stress or strain exerted on the PM fiber at different locations along the fiber with a high spatial sensing resolution.
摘要:
To eliminate a need for polarization adjustment, to simplify a configuration, and to make a configuration at low cost. Wavelength swept light is provided to a measurement-target optical fiber having an FBG with a chirped grating interval. A polarization multiplexing unit generates polarization multiplexed reference light by multiplexing first reference light and second reference light, which are swept in a wavelength in the same manner as wavelength swept light and have polarizations orthogonal to each other. Polarization multiplexed reference light is input to combine means along with reflected light from measurement-target optical fiber and is made to interfere with reflected light. A signal processing unit performs Fourier transform processing on the digital signal by dividing a time domain into a plurality of periods, and synthesizes the Fourier transform results on a distance axis to obtain a measurement result of orthogonal polarization components of reflected light.
摘要:
Methods, systems and apparatuses are disclosed comprising a tunable multilayered array reinforcement system having a supramolecular adhesive embedded with nanoparticles that are reoriented on-demand in response to or in advance of vibrational effects in a moving or stationary structure.
摘要:
Provided is a semiconductor integrated circuit device having pixel regions in a photodiode array region and having, in each of the pixel regions, a waveguide holding hole having a substantially perpendicular sidewall above the photodiode and embedded with a silicon oxide-based sidewall insulating film reaching the bottom surface of the hole and two or more silicon nitride-based insulating films having a higher refractive index on the inner side of the hole. This structure makes it possible to prevent deterioration of pixel characteristics of an imaging device, such as CMOS sensor, which is rapidly decreasing in size.
摘要:
System and methods for highly integrated optical readout MEMS sensors are provided. In one embodiment, a method for an integrated waveguide optical-pickoff sensor comprises: launching a laser beam generated by a laser light source into an integrated waveguide optical-pickoff monolithically fabricated within a first substrate, the integrated waveguide optical-pickoff including an optical input port, a coupling port, and an optical output port; and detecting an amount of coupling of the laser beam from the coupling port to a sensor component separated from the coupling port by a gap by measuring an attenuation of the laser beam at the optical output port.
摘要:
A high index contrast waveguide device is disclosed and described. In one embodiment the waveguide may include a lithium niobate substrate, a waveguide with a higher refractive index than that of the lithium niobate substrate patterned on a surface thereof, and an electrode electrically coupled to the waveguide.
摘要:
Disclosed herein are embodiments of sensor devices comprising a sensing component able to determine the presence of, detect, and/or quantify detectable species in a variety of environments and applications. The sensing components disclosed herein can comprise MOF materials, plasmonic nanomaterials, or combinations thereof. In an exemplary embodiment, light guides can be coupled with the sensing components described herein to provide sensor devices capable of increased NIR detection sensitivity in determining the presence of detectable species, such as gases and volatile organic compounds. In another exemplary embodiment, optical properties of the plasmonic nanomaterials combined with MOF materials can be monitored directly to detect analyte species through their impact on external conditions surrounding the particle or as a result of charge transfer to and from the plasmonic material as a result of interactions with the plasmonic material and/or the MOF material.