388 results about "Optical coupler" patented technology

The invention discloses a scanning high-resolution double-optical-comb spectrum system based on Raman gain modulation. The method is suitable for real-time spectrum detection with a wide spectrum range and high spectral resolution. The system comprises a single-frequency laser and driver, an optical coupler, a mode-locked laser, a rare earth doped amplifier, a wavelength division multiplexer, a Raman gain fiber, a sample to be tested, a photoelectric detector, a data processor and a wavemeter. The single-frequency laser couples part of light to the wavemeter, and the remaining light is divided into two paths to be coupled with the two amplified mode-locked lasers to enter the Raman gain optical fiber for Raman gain modulation and is converted into high-mutual-dryness double optical combs. The double combs pass through a to-be-measured sample in a combined manner, and interference signals are measured by the photoelectric detector and received by the data processor. And meanwhile, the processor sends a tuning signal to the single-frequency laser driver, so that the double combs scan in a wide spectrum range to obtain high-resolution spectrum information. Electrical feedback locking is not needed, and high-precision spectrum acquisition with megahertz resolution in a terahertz range can be completed within a few minutes.

According to the three-dimensional stacked photoelectric co-packaging structure and the packaging method thereof provided by the invention, the three-dimensional stacked structure is formed by bonding the optical chips with C2W of the adapter plate wafer, and the optical chips can be allowed to be processed separately and then bonded on the adapter plate wafer, so that the complexity of the packaging process is reduced, and the packaging reliability is improved; besides, a bonding pad of each layer of optical chip bonding pad region is in contact connection with a part of conductive via holes of the electric interconnection region, and an upper layer optical coupling region is arranged to shrink outwards relative to a lower layer optical coupling region to expose a first optical coupler in the lower layer optical coupling region, so that the areas of the optical chips are sequentially increased from bottom to top along the thickness stacking direction of the photoelectric switching structure; the electric interconnection structure is arranged on the outer side edge of the optical chip to form an inverted pyramid shape, the electric interconnection structure is distributed on the outer side edge of the optical chip, a conductive column structure can be effectively prevented from being manufactured on the optical chip, the process complexity is reduced, meanwhile, the optical interconnection structure is also distributed on the outer side edge of the optical chip, light in the optical chip can be directly coupled to a photoelectric transmission layer, and too high efficiency loss caused by too many optical coupling times is avoided.

The invention discloses a charging management circuit and a charger. The charging management circuit comprises a flyback converter, a first sampling feedback module, a second sampling feedback module and an optocoupler. The first sampling feedback module comprises a comparator, a first switch unit, a thermosensitive voltage dividing unit and a current sampling resistor. The duty ratio of a PWM chip is controlled through an optocoupler to achieve constant-current charging in the first charging stage. The resistance of the thermosensitive voltage dividing unit is increased when the temperature rises, the charging current is automatically reduced, and temperature self-adaptive protection is achieved. And when the charging current is reduced to a preset value, the second sampling feedback module takes over the control optocoupler to realize constant-voltage charging in a second charging stage. Constant-current and constant-voltage two-stage charging can be achieved, the function of automatically adjusting the charging current through the temperature is achieved, the charger is effectively prevented from being overheated in the high-temperature environment, and the safety of the charger and a battery is protected.

Apparatuses, systems and methods for optical coupling, optical integration, electro-optical coupling, and electro-optical packaging are described herein. Optical couplers may comprise various optical elements (e.g., mirrors as described herein) to relax optical assembly requirements and improve producibility. Optical couplers may improve fiber-to-chip, fiber-to-fiber and chip-to-chip optical connection. Optical couplers and optical components may be used to improve integration of, connection of, and / or packaging of optical systems and / or components with electrical systems and / or components.

Apparatuses, systems and methods for optical coupling, optical integration, electro-optical coupling, and electro-optical packaging are described herein. Optical couplers may comprise various optical elements (e.g., mirrors as described herein) to relax optical assembly requirements and improve producibility. Optical couplers may improve fiber-to-chip, fiber-to-fiber and chip-to-chip optical connection. Optical couplers and optical components may be used to improve integration of, connection of, and / or packaging of optical systems and / or components with electrical systems and / or components.

Apparatuses, systems and methods for optical coupling, optical integration, electro-optical coupling, and electro-optical packaging are described herein. Optical couplers may comprise various optical elements (e.g., mirrors as described herein) to relax optical assembly requirements and improve producibility. Optical couplers may improve fiber-to-chip, fiber-to-fiber and chip-to-chip optical connection. Optical couplers and optical components may be used to improve integration of, connection of, and / or packaging of optical systems and / or components with electrical systems and / or components.

The application provides an optical coupler applied to the field of optical communication. The optical coupler comprises a buried layer, a support layer, a waveguide layer and an upper cladding layer. In the height direction, the support layer is between the buried layer and the waveguide layer. The waveguide layer is between the support layer and the upper cladding layer. In the width direction, the waveguide layer and the support layer are inside the upper cladding layer. The materials of the waveguide layer and the support layer are different. In the application, the support layer is inside the upper cladding layer. Therefore, the upper cladding layer is on both sides of the support layer. The energy of the optical signal can be dispersed on both sides of the support layer, so that the degree of uneven energy distribution near the center of the waveguide layer is reduced, and the coupling loss of the optical coupler is reduced.

The invention relates to a packaging structure and a preparation method thereof, and relates to the technical field of semiconductors, in the packaging structure and the preparation method thereof, a first rewiring layer comprises a wiring layer and a dielectric layer, the orthographic projection of the wiring layer on a carrier plate is not overlapped with the orthographic projection of an optical coupler on the carrier plate, namely, the wiring layer does not shield an optical window of the optical coupler, and the dielectric layer is arranged on the dielectric layer; a light-transmitting dielectric material column is formed on the side, away from the carrier plate, of the first rewiring layer, the orthographic projection of the light-transmitting dielectric material column on the carrier plate is overlapped with the orthographic projection of the optical coupler on the carrier plate, at the moment, an optical window of the optical coupler is shielded by the light-transmitting dielectric material column, and the optical window cannot be polluted when the second packaging layer is prepared subsequently; the second packaging layer exposes the light-transmitting dielectric material columns, and the optical coupler achieves vertical optical coupling through the light-transmitting dielectric material columns.

The invention provides an optical feedback resonance enhanced forward Brillouin demodulation structure, which comprises a tunable laser, a first polarization controller, an erbium-doped optical fiber amplifier, an optical coupler, an optical isolator, a forward Brillouin gain optical fiber, a band-pass filter and a photoelectric detector, a second polarization controller; and a spectrum analyzer. The first polarization controller is connected with a port a of the optical coupler, a port b of the optical coupler is connected with an input end of the erbium-doped optical fiber amplifier, an output end of the erbium-doped optical fiber amplifier is connected with the optical isolator, the optical isolator is connected with the band-pass filter, the band-pass filter is connected with the forward Brillouin gain optical fiber, and the optical fiber is fed back to a port c of the coupler through the second polarization controller. The output power of the erbium-doped optical fiber amplifier is controlled, and the polarization states of the pump light and the feedback laser are controlled by the first polarization controller and the second polarization controller, so that the forward Brillouin effect is amplified.

Implementations disclosed describe, among other things, a sample inspection system that includes an illumination subsystem to illuminate a sample with a plurality of time-spaced light pulses generated, using a pulse multiplexing system, from a source light pulse. The pulse multiplexing system includes a plurality of optical loops, each deploying an optical coupler that outputs a first portion of incident light to a sample and provides a second portion of incident light as an input into the next optical loop. The sample inspection system further includes a collection subsystem to collect a portion of light generated upon interaction of the plurality of time-spaced light pulses with the sample, and a light detection subsystem to detect the collected portion of light.

The utility model discloses an industrial control board based on STM32F103 singlechip, it includes main control chip, RS 485 level conversion circuit, digital I / O circuit and LED pilot lamp, and RS 485 circuit realizes efficient level conversion through three stage anti -interference framework magnetic pearl filtering, photo -coupler isolation, TVS protection, and digital I / O circuit adopts photo -coupler and isolation amplifier to enhance signal stability, and is equipped with LED pilot lamp feedback state, and the application effectively reduces the code rate less than 10 ‑7 , reduces signal dithering, and the temperature drift attenuation is only 2.1%, is suitable for industrial automation and intelligent manufacturing system, has simple structure, low in cost, stable performance and the advantages such as.

The invention discloses an all-fiber three-dimensional tomography system, which is used for performing three-dimensional tomography on an object to be observed at a high speed and comprises a light source, a first optical coupler, a first optical circulator, a first optical collimator, a first convex lens, an electric control attenuator, a second optical circulator, a second optical collimator, a second convex lens, a second optical coupler and a balance detector. The light source included in the all-fiber three-dimensional tomography system can quickly perform line or plane scanning on optical scattering media such as biological tissues and the like by utilizing a technology of capturing optical signals to obtain images and adopting an all-fiber line architecture, so as to obtain high-resolution three-dimensional images.

The invention discloses an FBG (Fiber Bragg Grating) and F-P (Fabry-Perot) cavity multiplexing air pressure sensing system, which comprises a linear tunable laser 1, a Mach-Zehnder interference device 2, a sensing array 3 and a processing unit 4, and is characterized in that an output optical coupler of the linear tunable laser 1 is connected with the Mach-Zehnder interference device 2; the linear tunable laser 1 and the Mach-Zehnder interference device 2 are directly connected with the processing unit 4, and the sensing array 3 is an FBG and F-P cavity sensor multiplexing array and is connected with the Mach-Zehnder interference device 2; according to the invention, multiplexing and distance positioning of the FBG and the F-P cavity sensor are realized, temperature compensation is carried out on pressure measurement while the spatial resolution can reach 20 [mu] m for temperature measurement, and the FBG-F-P cavity sensor can be widely applied to the fields of aviation, precision manufacturing and the like.

The invention provides an automatic bidirectional mode-locking fiber laser system, and relates to the technical field of fiber lasers. The system comprises a first electric polarization controller, a second wavelength division multiplexer and a second gain optical fiber which are connected in sequence to form a first gain branch used for realizing laser amplification and polarization state adjustment in an anti-clockwise direction; the second electric polarization controller, the first wavelength division multiplexer and the first gain optical fiber are sequentially connected to form a second gain branch for realizing laser amplification and polarization state adjustment in the clockwise direction; and the third electric polarization controller, the gold nano film and the optical coupler are sequentially connected to form a common branch for simultaneously realizing automatic bidirectional mode locking in the clockwise direction and the anticlockwise direction. The automatic bidirectional mode-locking fiber laser system based on a genetic algorithm and a feedforward neural network is adopted to realize automatic searching and long-term maintenance of a bidirectional single soliton mode-locking state, and is suitable for the fields of double-comb spectrum, double-comb distance measurement, precision spectroscopy and light source programming.

The invention discloses an optocoupler state detection method and device, a storage medium and an electronic device.The method is applied to an insulation circuit and comprises the steps that the opening and closing states of a third optocoupler and a fourth optocoupler are changed, and when it is determined that the opening and closing states of the third optocoupler and the fourth optocoupler are both normal according to the voltage value of a sixth resistor in the corresponding state, the third optocoupler and the fourth optocoupler are switched on; controlling the third optocoupler and the fourth optocoupler to be closed; and controlling the first optocoupler to be switched off, changing the on-off state of the second optocoupler, and controlling the first optocoupler to be switched on and the second optocoupler to be switched off when the off-state of the first optocoupler and the on-off state of the second optocoupler are determined to be normal according to the voltage value of the fourth resistor in the corresponding state. When it is determined that the difference degree of the resistance values of the seventh resistor and the eighth resistor is smaller than a preset degree according to the voltage value of the fourth resistor in the corresponding state, the first optocoupler is controlled to be closed, the second optocoupler is controlled to be closed, and whether the closed state of the first optocoupler is normal or not is determined according to the voltage value of the fourth resistor in the corresponding state.

The application discloses a kind of optical coupler health state evaluation methods based on switching time characteristic parameters, pre-calibration switching time characteristic parameters t r The mapping relationship between CTR;In the state that optical coupler is in online operation, the switching time characteristic parameters of optical coupler are detected and calculated t r Online real-time detection value;Based on the mapping relationship between pre-calibration switching time characteristic parameters t r The mapping relationship between CTR;The online real-time value of CTR corresponding to optical coupler is calculated;Based on the change of the online real-time value of CTR corresponding to optical coupler with the online operation time of optical coupler, the health state of optical coupler is evaluated;The application avoids the complex measurement process of directly measuring CTR and avoids the interference to original circuit in measurement process;Meanwhile, the application is based on the performance degradation condition of optical coupler under real switching mode, and the life evaluation model is established under actual working environment, so that the health state of optical coupler under specific condition can be more accurately reflected.

A photonic integrated circuit includes a substrate, an insulating layer on the substrate, an optical device layer on the insulating layer, the optical device layer including an optical coupler, and a reflective layer between the optical coupler and the insulating layer, where the optical device layer further includes hydrogen-containing amorphous silicon.

This invention relates to an instrument for cutting human or animal tissue, including an optical coupler. The cutting instrument includes - a femtosecond laser (1), - a shaping system (2) located downstream of the femtosecond laser (1) for forming a phase-modulated laser beam, - an optical scanner (4) located downstream of the shaping system (2), - an optical focusing system (5) located downstream of the optical scanner (4), and - a control unit (6) for controlling the shaping system (2), the optical scanner (4), and the optical focusing system (5). The instrument is characterized in that it further includes an optical coupler (3) between the femtosecond laser (1) and the shaping system (2), the optical coupler (3) including a photonic crystal fiber for filtering the phase-modulated laser beam (21) from the shaping system (2).

The utility model relates to the technical field of power supply circuits, in particular to a bipolar output circuit for a photoresist constant-temperature power supply, which comprises a bipolar inverter circuit, a driving control circuit and an auxiliary power supply circuit. The isolation driving circuit uses a simple optical coupler device, a special digital driver or a high-speed driving optical coupler is not needed, an upper tube driving auxiliary power supply directly couples to generate two paths of driving power supplies through a mode of adding an auxiliary winding on an inductor of a conventional PWM converter, an additional independent auxiliary power supply is not needed, a bipolar voltage output function is realized, and the voltage output is realized. The circuit has the advantages of no physical contact, long service life, simple circuit and low cost.

This invention discloses a simple, multifunctional, integrated 5G analog fronthaul in-band full-duplex communication method for remote units (RUs). This method primarily relates to the fields of optical communication technology and microwave technology. The system structure of the method, as shown in Figure 1 of the specification, includes a laser, downlink vector signal, electrical local oscillator signal, downlink interference signal, target signal, reference signal, 90° electrical coupler, dual-polarization quadrature phase-shift keying modulator, phase modulator, single-mode fiber, optical coupler, polarization beamsplitter, polarization beam combiner, polarization controller, polarizer, and photodetector. The remote unit (RU) uses a single phase (PM) modulator to achieve self-interference cancellation (SIC) combined with anti-fiber dispersion transmission and down-conversion, eliminating the need for bias control and additional local oscillator (LO) branches, resulting in a simple structure. At the central office (CO), the carried downlink signal and local oscillator signal are single-sideband modulated to achieve anti-fiber dispersion transmission. The RU uses wavelength reuse technology to perform PM cascaded down-conversion on the signal received from the uplink, and the SIC is moved from the RU to the CO to simplify the RU. The entire link has no optical filter and is reconfigurable.

The utility model discloses a system for measuring the half-wave voltage of a phase modulator. The system comprises a laser generation module, an optical coupler, a first phase modulator, a second phase modulator, a first Faraday mirror, a second Faraday mirror, a signal generator, a photoelectric detector and an oscilloscope. The utility model discloses a system for measuring the half-wave voltage of a phase modulator, which is characterized in that a high-frequency periodic square wave electric signal is loaded to a second phase modulator through a signal generator, and the phase drift amount caused by unstable factors such as a light source, an optical device and an external environment can be regarded as perturbation in a small time period; the half-wave voltage of the second phase modulator is obtained by accurately calculating the variable quantity of the number of the peak (valley) values of the sine (cosine) waveform, so that the judgment on the light intensity extreme point of an interference pattern is avoided, the measurement precision is improved, and the key core application in the fields of quantum communication and quantum calculation is realized.

This improves the degradation of the cross-correlation coefficient caused by the error between the set frequency and the actual frequency of the light source, and makes it possible to improve the degradation of the measurement accuracy of strain and temperature. [Solution] The light source unit has a frequency-stabilized wavelength-tunable laser that generates continuous light, and a first optical coupler splits the continuous light generated by the light source unit into two, sending one to a second optical coupler and the other to an optical frequency measurement unit. The optical frequency measurement unit measures the frequency of the continuous light generated by the light source unit, and the second optical coupler further splits the continuous light split by the first optical coupler into two, sending one as probe light to the optical pulse generation unit and the other as local light to a detection unit. The detection unit measures the frequency change Δf by means of coherent time domain reflectometry and a means for heterodyne detection of the Rayleigh scattered light and the local light resulting from Rayleigh scattering of pulsed light in the fiber under test. max and means for acquiring the

The application belongs to the technical field of wavelength measurement, and is especially a high-resolution speckle wavelength measurement device and method. The device comprises a shell, a first optical fiber incident port and a second optical fiber incident port are arranged on the outer wall of the shell, an optical switch, a light splitting coupler, a calibration light source and a test light path are arranged in the shell, and the test light path is composed of a multimode optical fiber, an optical fiber mode enhancement device and a surface array detector. The application enhances the coupling and phase delay between different modes by applying mechanical disturbance to the scattering medium, increases the number of excited modes, and solves the problems that the resolution of the speckle wavelength meter is limited by the light path length of the transmission medium and the insufficient information density of the speckle per unit area. The method can improve the wavelength resolution, and effectively improve the sampling speed of the speckle wavelength meter by reducing the size of the photosensitive camera target surface.

The invention relates to the technical field of electric appliance control circuits, and discloses a non-isolated zero-crossing detection and commercial power voltage detection multiplexing low-cost simple circuit, which comprises a rectifier diode D3301 of which the cathode is connected with a live wire of a commercial power input end, and the anode is connected with a first resistor R3301; the first resistor R3301, the second resistor R3302 and the third resistor R3303 are connected in series. Through a sampling link formed by a rectifier diode D3301 and series voltage dropping resistors R3301, R3302 and R3303, a zero-cross detection signal is provided for an interruption input end VT at the same time, and a voltage detection signal is provided for an analog input end AD through a divider resistor R3304 and a filter capacitor C3301, so that multiplexing of two types of detection is realized under a non-isolation structure, commercial power detection can be completed without an optocoupler or an isolation transformer, and the detection efficiency is improved. Therefore, devices are reduced and circuits are simplified.

Described herein are systems and techniques for providing photonic devices having efficient optical coupling between waveguides. The photonic devices comprise a glass substrate having glass waveguides and a photonic integrated circuit (PIC) having PIC waveguides evanescently coupled with the glass waveguides. The waveguides may have recesses disposed between adjacent waveguides to allow for excess adhesive to be squeezed out. The PIC may have a trench exposing the waveguide layer of the PIC, thus reducing the gap between the PIC waveguides and the glass waveguides when coupled.

The application provides a non-immersed transmembrane pressure detection system, which is characterized in that: a liquid inlet detection module, a permeation end detection module, a backflow end detection module and a transmembrane pressure calculation module are arranged, a non-immersed transmembrane pressure detection circuit is arranged in each of the liquid inlet detection module, the permeation end detection module and the backflow end detection module, the corresponding transmembrane pressure calculation result is obtained by calculating the liquid inlet detection signal, the permeation end detection signal and the backflow end detection signal output by the circuit, a four-stage amplification and analog signal isolation circuit composed of a high-precision resistance voltage division network, a first-stage operational amplifier circuit, a second-stage operational amplifier circuit, a linear optical coupler, a third-stage operational amplifier circuit and a fourth-stage operational amplifier circuit is arranged in the non-immersed transmembrane pressure detection circuit, the detected current signal is converted into an electrical signal by using the operational amplification piezoelectric effect, and the piezoelectric type can provide an anti-interference signal electrical output after isolation chip. The application has good linearity, simple circuit calculation and effectively solves the problem of electrical signal isolation between an analog signal and a single-chip microcomputer application system.

A microphone 1 includes a light source 11 that outputs an optical signal, an optical coupler 12 that demultiplexes and multiplexes the optical signal, a transmission path 13 including an optical fiber 130 that transmits a demultiplexed optical signal demultiplexed by the optical coupler 12 to the optical coupler 12 in mutually opposite directions, a sensor part 14 that is connected to the transmission path 13 and returns the demultiplexed optical signal to be transmitted by the transmission path 13 to the transmission path 13 via a space part 40, and a light receiving element 15 that receives a multiplexed optical signal multiplexed by the optical coupler 12.

A parallel interconnect system for transmitting data comprising: a plurality of light sources for emitting light for use as a carrier for the data; a first optical transceiver array having at least one optical transmitter; at least one fiber array configured to transmit light emitted by the at least one optical transmitter; an first optical coupler configured to couple the plurality of light sources to one end of the at least one fiber array; a second optical transceiver array having at least one optical receiver; a second optical coupler configured to receive and direct the transmitted light from another end of at least one fiber array to the second optical transceiver array.

To provide a wavelength conversion layer with improved light extraction efficiency, a display element using the wavelength conversion layer, and a method for manufacturing the wavelength conversion layer. [Solution] A wavelength conversion layer having a perovskite-type crystal structure, a nanocrystalline plate having a composite layer structure in which a first layer containing a ligand-coordinated cation A and a second layer containing a cation B and anion X are alternately stacked; a medium that supports the nanocrystalline plate and propagates light from the nanocrystalline plate; a first photo-coupler that guides light from outside the layer into the layer; and a second photo-coupler positioned differently from the first photo-coupler that guides light propagating within the layer to the outside of the layer, wherein the composite layer structure has an average number of stacks of 3 to 5, and the nanocrystalline plate is oriented such that the normal to the main surface of the plate intersects with the second photo-coupler.

The invention relates to an on-line self-adaptive health detection system and method for initiating explosive devices of an agile aircraft, and belongs to the technical field of on-line detection of spaceflight electronic systems. Comprising a constant current source, an integrated computing power center, a reusable detection link and an ignition loop, wherein the integrated computing power center comprises a sequential logic control algorithm module and a data estimation module; the reusable detection link comprises an analog switch 1, an isolation optocoupler, a multi-choice analog switch, a voltage following module, an isolation operational amplifier module, a differential operational amplifier module and an AD acquisition module; the ignition loop comprises an initiating explosive device to be detected; according to the invention, the problems of poor precision, complex hardware, low test efficiency and the like of a traditional single-path voltage measurement method are solved, and the test coverage, safety and application reliability of the agile aircraft are improved.