73results about How to "Optical signal enhancement" patented technology

An array of piezoelectric resonators used in a sensor device in order to identify chemical and biological agents. The resonators can operate as bulk acoustic wave (BAW), surface acoustic wave (SAW), or Love mode devices. The sensor device integrates gravimetric, calorimetric, thermal gravimetric, voltage gravimetric and optical detection methods into one sensor system, improving the accuracy of identifying hazardous agents. For gravimetric detection, dual-mode resonators provide simultaneous calorimetric and gravimetric data, one type from each mode. Resonators with heaters on the surfaces will provide thermal gravimetric data. An optical detector can be used to analyze the optical signal from the surface of a coated resonator. Additionally, voltage gravimetric measurements can be made with an electric field set up between the resonator and an external electrode. Thermal voltage gravimetric measurements can be made by adding an integrated heater on the resonator with an external electrode. An alarm can be activated upon the identification of a hazardous agent. The sensor device can utilize other valuable information, including traceable time, GPS location, and variables related to temperature, humidity, air speed, and air direction.

A multiplexer/demultiplexer is provided for optical interconnection between electronic components on an integrated circuit chip. The multiplexer/demultiplexer includes a substrate formed with an array of photo emitters/detectors and conditioning electronics coupled thereto. A first layer of optically transparent material is formed on the substrate overlying the emitters/detectors and a second layer of optically transparent material, functioning as an optical waveguide, is formed on the first layer. A binary blazed grating is formed at the interface of the two layers. For multiplexing, discrete wavelength optical signals are modulated with data, emitted by the emitters, intercepted by the binary blazed grating, and multiplexed into a polychromatic beam for transmission through the waveguide. For demultiplexing, the discrete wavelengths are separated by the binary blazed grating and directed to corresponding detectors. The conditioning electronics receive and demodulate the output of the detectors to extract data, and format the data for communication with electronic components.

An SOI-based photonic bandgap (PBG) electro-optic device utilizes a patterned PBG structure to define a two-dimensional waveguide within an active waveguiding region of the SOI electro-optic device. The inclusion of the PBG columnar arrays within the SOI structure results in providing extremely tight lateral confinement of the optical mode within the waveguiding structure, thus significantly reducing the optical loss. By virtue of including the PBG structure, the associated electrical contacts may be placed in closer proximity to the active region without affecting the optical performance, thus increasing the switching speed of the electro-optic device. The overall device size, capacitance and resistance are also reduced as a consequence of using PBGs for lateral mode confinement.

An off-resonance photoacoustic spectrometric detection and analysis device consists of a photoacoustic spectrometric module (8). The photoacoustic spectrometric module (8) comprises a light source module (2-1), a photoacoustic signal generation module (2-2), an optical power measurement module (2-3) and a fault diagnostic analysis module (2-4). Optical signals generated by an infrared incoherence light source in the light source module (2-1) are focused by an ellipsoidal reflector to form a focused light beam, the focused light beam is modulated into light of specific frequency and wavelength by chopping blades of an optical chopper and optical filters and then transmitted to the photoacoustic signal generation module (2-2), and the fault diagnostic analysis module (2-4) calculates each gas concentration according to to-be-tested gas photoacoustic signals generated by irradiation, diagnoses faults and alarms. The off-resonance photoacoustic spectrometric detection and analysis device can be used for quantitative detection of gases such as SF6, CF4, SO2F2, SOF2, SO2, SF4 and H2O and is applicable to onsite online monitoring.

Different bands (C-band and L-band) are allotted respectively to an upstream optical signal and a downstream optical signal. In a transmission-path optical fiber for Raman amplification, the C-band optical signal is amplified by pumping light from a C-band pumping light source, and the L-band optical signal is amplified by pumping light from an L-band pumping light source. As a result of this configuration, the optical signals are Raman-amplified through backward pumping in both upstream and downstream directions, whereby negative effects, which could be exerted on the optical signals by forward pumping, can be avoided.

A system and method to broadcast an optical signal through an amorphous medium, including a primary emitter capable of producing a primary optical signal during at least one broadcast period and capable of transmitting the primary optical signal through the amorphous medium. A secondary emitter, separate from the primary emitter and in operation during at least a portion of the broadcast period, produces a secondary emission detectable by a detector during the broadcast period. A signal entrainment controller, in communication with the primary emitter and the secondary emitter, synchronizes the secondary emitter with the primary emitter to generate a resultant signal of higher intensity than the primary signal by itself.

An optical platform including optical bench, an optical or photonic coupling device and a photonic circuit. The photonic circuit includes a photonic crystal along a waveguide and/or defect. The coupling device may be a waveguide or impedance matching interconnection device. The optical bench includes a rectangular trench to seat an optical fiber and provide alignment with the photonic circuit.

The invention discloses an optical fiber bundle spectrometer, which comprises an optical fiber bundle, a dispersion element and an array detector element, wherein an output end of the optical fiber bundle is arranged into an optical slit, is fixedly arranged on an incident light path of the dispersion element, and is directly used as an incident slit of the spectrometer, the energy loss of a sampling optical signal can be greatly reduced, the instrumental sensitivity is greatly improved, as a result, the nonlinearity, the dark noise and the stray light error of the instrument are reduced, and higher measurement accuracy and quicker measurement velocity are obtained. Through orderly arranging a two-dimensional array detector and optical fiber units at the input end and the output end of the optical fiber bundle and connecting a plurality of sets of sub-fiber bundle spectrometer in parallel, the two-dimensional image spectra measurement and multi-purpose spectral measurement can be realized through the optical fiber bundle spectrometer, so the optical fiber bundle spectrometer has the advantages of dispensing with mechanical scanning or switching mechanism, and having quick measurement speed, high precision, flexible configuration, wide application range and the like.

The invention discloses the Schlieren type ultrasonic wave observer system. The invention states optics interference by the ultrasonic wave sound field after perturbation the medium, and combines to make the interference penetration optical projection the image, the goal lies in the observation ordinary naked eye blind ultrasonic wave sound field distribution. Characteristic of the invention using the spectroscope and the reflector combination, as well as microcontroller precise time delay control, might formerly be limited under the 4F optical field length limit to enhance largely the field of vision the several fold.

An optical transmitter includes a light source and an SBS suppression circuit coupled to the light source. The light source is operable to generate an optical signal having one or more wavelengths. The optical signal has a signal spectrum having an upper band limit and a lower band limit. The SBS suppression circuit is operable to communicate a noise current for receipt by the light source. The noise current is operable to broaden the signal spectrum of the optical signal. The light source operates to convert the noise current into a noise component of the signal spectrum that resides between the upper band limit and the lower band limit.

When in an optical signal amplifying triode 10, light of a second wavelength λ₂, selected from among light from a first optical amplifier 26, into which a first input light L₁ of a first wavelength λ₁ and a second input light L₂ of second wavelength λ₂ have been input, and a third input light (control light) L₃of a third wavelength λ₃ are input into a second optical amplifier 34, an output light L₄ of the third wavelength λ₃, selected from among the light output from the second optical amplifier 34, is light that is modulated in response to the intensity variation of one or both of the first input light L₁ of the first wavelength λ₁ and the third input light L₃ of the third wavelength λ₃ and is an amplified signal, with which the signal gain with respect to the third input light (control light) L₃ of the third wavelength λ₃ is of a magnitude of 2 or more. An optical signal amplifying triode 10, which can directly perform an optical signal amplification process using control input light, can thus be provided.

The invention is in the field of distributed Raman amplification for digital and analog transmission applications and other applications, e.g., instrumentation and imaging applications, including HFC-CATV applications. In particular, the invention uses a high power broadband source of amplified spontaneous emission (ASE) as the Raman pump source for improved system performance. The invention also includes methods for constructing such a high-power broadband Raman pump.

A hybrid fiber coax (HFC) circuit comprises a diplexer and laser. The diplexer has an input terminal receiving a downstream radio-frequency (RF) signal from a passive optical network (PON). The diplexer outputs this signal from its common terminal onto a cable distribution network (CDN) covering the “last mile” to the customer. The diplexer receives on the common terminal an upstream radio-frequency (RF) signal from the CDN which it outputs on its output terminal. The laser connects to receive the upstream RF signal from the output terminal and uses this signal to generate an optical upstream RF signal transmitted to the head-end or hub via the PON. The HFC circuit can also comprise an RF amplifier, equalizer, or pod adjustment unit. Elements of the HFC circuit can be mounted on a substrate with an interface connection configured to fit into an optical network terminal (ONT). A related system is also disclosed.

A transceiver having an improved transmitter optical signal to noise ratio, and methods of making and using the same.

The present invention relates to analyte detection devices and methods of using such devices to detect minute quantities of a target analyte in a sample. In particular, the invention provides an analyte detection device comprising a plurality of composite metallic nanostructures conjugated to analyte binding partners and a surface containing a metallic nanolayer on which a plurality of capture molecules is immobilized. Methods of preparing composite nanostructures are also described.

A micropore structure of a microplate strip comprises round micropore in a standard format. A plurality of convex tooth strips in the same shape and proportion are arranged in an equant manner on the annular wall of the lower part of the inside of each micropore, the bottoms of the convex tooth strips are connected with the bottom of the micropore, and the sides of the convex tooth strips are connected with the annular wall of the micropore. The surface area formed by the convex tooth strips convex inward is much greater than the surface area of the inner cavity of the conventional micropore, so the solid-liquid interface of the same volume of reaction solution has a greatly increased reaction area that is favorable for complete immunoreactions, and luminous reaction or enzyme catalyzed reaction and contributes to the great reduction in time for reaching reaction equilibrium, improvement in detection flexibility and reduction in time for detection; the convex tooth strips improves both the reaction area and an optical signal compared with the conventional micropore structure and increases the strength of the detection optical signal of a luminometer; the top parts of the convex tooth strips are inclined sectors which are capable of reflecting the optical signal of the luminous reaction upward to a probe of the luminometer, and compared with the reaction of the micropore side wall of the conventional microplate strip, the optical signal of the probe is strengthened considerably and the flexibility of a method is improved.

An optical proximity sensor arrangement comprises a semiconductor substrate (100) with a main surface (101). A first integrated circuit (200) comprises at least one light sensitive component (201). The first integrated circuit is arranged on the substrate at or near the main surface. A second integrated circuit (300) comprises at least one light emitting component (301), and is arranged on the substrate at or near the main surface. A light barrier (400) is arranged between the first and second integrated circuits. The light barrier being designed to block light to be emitted by the at least one light emitting component from directly reaching the at least one light sensitive component. A multilayer mask (500) is arranged on or near the first integrated circuit and comprising a stack (501) of a first layer (502) of first elongated light blocking slats (503) and at least one second layer (504) of second elongated light blocking slats (505). The light blocking slats are arranged in the mask to block light, incident on the mask from a first region of incidence (701), and to pass light, incident on the mask from a second region of incidence (702), from reaching the at least one light sensitive component.

The conventional EDFA has such problems that it is very costly since it requires an external high-energy laser diode and an optical coupling means for optically coupling the pumping light given from the laser diode, and that it must have a long length for obtaining a desired amplification degree. A constitution having an optical waveguide and an pumping light source integrated for solving the problems is also proposed, but it also has a problem in view of downsizing.

This invention proposes a waveguide optical amplifier 1, in which a surface light emission source 3 for pumping driven electrically is provided adjacently to and integrally with an optical waveguide 2 doped with a light-emitting species, in the longitudinal direction of the optical waveguide.

Disclosed is a novel free space optical communication system comprising an optical amplifier configured to amplify an optical signal received from a fiber optic cable, a transmitter coupled to the optical amplifier and configured to transmit the amplified optical signal across a free space medium. The system also includes a receiver configured to receive the attenuated optical signal and a second optical amplifier coupled to the receiver configured to amplify the attenuated optical signal before transmitting the optical signal on to a fiber optic cable. The optical amplifier is preferably a Raman optical amplifier, but may also be any other optical amplifier, or combination of optical amplifiers, known in the art.

The invention relates to a chemiluminescence immunoassay for helicobacter pylori in a gastric mucosa sample. The chemiluminescence immunoassay comprises the following steps of: (a), preparing a sample diluent with a test substance; (b), forming an antibody-antigen compound; (c), separating the sample obtained in the step (b) from the antibody-antigen compound obtained in the step (b); (d), forming an antibody-antigen-antibody compound; (e), adding a luminescence substrate; and (f), measuring the amount of the marked antibody, wherein the sample diluent contains protein and alkaline matter, and the pH of the sample diluent is 8.0-10. The chemiluminescence immunoassay for helicobacter pylori in the gastric mucosa sample provided by the invention ensures the accuracy of the test result through the sample diluent containing the protein and the alkali matter. Meanwhile, the luminescence substrate is low in cost, and the composite enhancer enables a light signal to be enhanced and everlasting.

The invention provides a high-precision multi-dimensional spectrometer detector adjusting structure. The high-precision multi-dimensional spectrometer detector adjusting structure comprises a shell, afocusing and reflecting device, a reflecting device, a light detecting device, an optical grating and an adjustable fixing mechanism, wherein the shell is provided with a slit, the focusing and reflecting device, the reflecting device, the light detecting device and the optical grating are clockwise arranged in the shell, the slit is located between the optical grating and the focusing and reflecting device, the slit faces the reflecting device, the slit, the reflecting device, the optical grating, the focusing and reflecting device and the light detecting device form a spectral path, light can be incident into the light detecting device through the reflection of the slit, reflecting device, optical grating and focusing and reflecting device in sequence, the adjustable fixing mechanism comprises a main fixing block and an angle adjusting device, the main fixing block is provided with a fixing side face and a mounting side face, the fixing side face of the main fixing block is arrangedon the shell through the angle adjusting device, and the light detecting device is arranged on the mounting side face of the main fixing block. The high-precision multi-dimensional spectrometer detector adjusting structure has the advantages that the structure is simple, and the adjustment is convenient.