364 results about "Electro-optic modulator" patented technology

The embodiment of the invention provides an electro-optical modulator and a light quantum computer. The electro-optical modulator comprises an electrode assembly and an optical waveguide assembly. The electrode assembly comprises a positive signal electrode, a negative signal electrode, a first grounding electrode and a second grounding electrode, and the positive signal electrode and the negative signal electrode are arranged between the first grounding electrode and the second grounding electrode. The optical waveguide assembly is configured to bear optical signals and comprises a first optical waveguide and a second optical waveguide, the first optical waveguide is located between the positive signal electrode and the negative signal electrode and used for bearing first optical signals, and the second optical waveguide is located between the first grounding electrode and the positive signal electrode or between the second grounding electrode and the negative signal electrode and used for bearing second optical signals. The carrier is used for bearing second optical signals. Constant-amplitude voltage signals with opposite phases are applied to the positive signal electrode and the negative signal electrode which are tightly coupled, so that the modulation efficiency can be improved, and the common-mode noise can be reduced.

The invention provides a bent waveguide structure, an electro-optical modulator and a light quantum computer, and relates to the technical field of electro-optical modulation.The bent waveguide structure comprises an input waveguide, a bent waveguide and an output waveguide which are sequentially connected, and the bent waveguide comprises a substrate transmission waveguide layer, an input coupling part and an output coupling part; the input coupling part and the output coupling part are arranged at the two ends of the substrate transmission waveguide layer respectively, a shallow etching groove is formed between the input coupling part and the output coupling part, the input coupling part is connected with the input waveguide, and the output coupling part is connected with the output waveguide. Compared with the prior art, the shallow etching groove is formed between the input coupling part and the output coupling part, so that the thickness of the waveguide film at the bending part is reduced to ensure that the substrate transmission waveguide layer is of a single-mode structure, the transmission loss is reduced, and the bending waveguide is relatively independent from the input waveguide and the output waveguide, so that the transmission efficiency is improved. Therefore, the process precision of the bent waveguide can be independently adjusted, the process time is reduced, and the efficiency is improved.

The invention provides a lead zirconate titanate composite film with a high electro-optical coefficient, a preparation method of the lead zirconate titanate composite film and an electro-optical modulator, the lead zirconate titanate composite film comprises an insulating substrate, a buffer layer and a ferroelectric main body layer which are sequentially stacked, and the buffer layer is a lanthanum-doped lead zirconate titanate film; the ferroelectric main body layer is a lead zirconate titanate thin film and has (001) / (100) orientation. The composite film has a relatively high electro-optical coefficient, relatively low driving voltage and relatively high thermal stability.

The invention provides an electro-optical modulator and a modulation method thereof, the electro-optical modulator comprises a substrate, a buried oxide layer and a lithium niobate waveguide layer are sequentially stacked on the substrate, and the lithium niobate waveguide layer comprises a first optical waveguide and a second optical waveguide; the electrode layer comprises a composite traveling wave electrode and a direct-current electrode, and the direct-current electrode is arranged on one side, in the signal transmission direction, of the composite traveling wave electrode; wherein the composite traveling wave electrode comprises a metal electrode and a polymer electrode, the metal electrode is embedded into the buried oxide layer, the polymer electrode is arranged on the surface of the buried oxide layer, and the composite traveling wave electrode is arranged between the first optical waveguide and the second optical waveguide and arranged on the side faces of the first optical waveguide and the second optical waveguide respectively; wherein the direct current electrode is arranged between the first optical waveguide and the second optical waveguide. The electro-optical modulator is high in electro-optical conversion efficiency, the plasma effect caused by light field coupling is effectively avoided, and the light loss of the device is remarkably reduced.

The application provides a Y-shaped thin film lithium niobate electro-optical modulator and a manufacturing method. A lithium niobate layer on an electro-optical modulator chip is etched into a corresponding curved waveguide structure, and two curved waveguide structures are symmetrically arranged on both sides of the Y-shaped waveguide structure, so that the heights of two light paths are consistent. The curved waveguide structure reduces the space size required by the waveguide while ensuring the waveguide length. For the waveguide with the same length, a chip with a smaller length can be used for mounting. The signal electrode and the ground electrode are arranged on both sides of each straight waveguide in the curved waveguide structure, the optical signal in the waveguide is modulated, and the modulation requirement of the electro-optical modulator is realized.

The invention provides an optical gain and electro-optical modulation integrated device and a preparation method thereof, and relates to the field of photoelectron, the optical gain and electro-optical modulation integrated device comprises a chip platform, and an electro-optical modulator and a gain waveguide which are integrated on the chip platform, and the chip platform is doped with rare earth ions in a region corresponding to the gain waveguide; the electro-optical modulator is used for modulating an input optical signal to obtain a modulated optical signal; and the gain waveguide is used for amplifying the modulated optical signal under the action of the pump light and the rare earth ions to obtain a target optical signal. The electro-optical modulator and the gain waveguide are integrated on the chip platform, cooperative work between the electro-optical modulator and the gain waveguide is achieved through rare earth ions, integrated design is achieved, the defects of discrete devices are overcome, and the design target of an on-chip photonic system can be met.

The invention relates to an electro-optical Mach-Zehnder modulator (1) comprising an input divider, first and second main waveguides (10p, 20p), and an output combiner (3). It also includes a first coplanar RF line (30) associated with the first main waveguide (10p). Finally, it includes a first additional waveguide (10a), not coupled to the input divider (2) and the output combiner (3), and having a positioning relative to a central track (33), a dimensioning and a doping profile symmetrical to those of the first main waveguide (10p), with respect to a plane of symmetry (Ps), orthogonal to the main plane (XY), parallel to the first main (10p) and additional (10a) waveguides, and passing through a center of the central track (33).

The invention discloses a frequency response testing device and method for a Mach-Zehnder electro-optical modulator, and belongs to the technical field of photoelectrons. A dual-tone or multi-tone optical signal output by the optical excitation module is transmitted to the Mach-Zehnder electro-optical modulator to be measured; the signal source outputs a sinusoidal signal of which the frequency is f, and the sinusoidal signal is loaded to a radio frequency driving electrode of the Mach-Zehnder electro-optical modulator to be measured to modulate an optical signal sent into the Mach-Zehnder electro-optical modulator to be measured by the optical excitation module; and finally, a modulated light signal output by the Mach-Zehnder electro-optical modulator to be measured is subjected to photoelectric conversion and detection through the measurement module. And extracting a modulation coefficient and a half-wave voltage of the Mach-Zehnder electro-optical modulator to be measured at the frequency f according to the amplitude of the detection signal and the signal amplitude loaded to the Mach-Zehnder electro-optical modulator to be measured by the signal source.

The present application provides a heterogeneously integrated photonic chip, a heterogeneous integration method, a system, and an optical communication device. The heterogeneously integrated photonic chip comprises a first wafer and a second wafer, wherein: the second wafer is integrated above the first wafer; the first wafer comprises a first substrate layer and an electro-optic material layer disposed on one side of the first substrate layer; and the second wafer comprises a silicon base layer arranged on the side of the electro-optic material layer away from the first substrate layer. In the present application, by integrating the second wafer above the first wafer, with the first wafer comprising an electro-optic material layer, and the second wafer comprising a silicon base layer, the integration of two heterogeneous materials, the electro-optic material layer and the silicon base layer, on a single chip is achieved. This heterogeneously integrated photonic chip has the advantage of high integration. Additionally, the electro-optic material layer can form a high-speed electro-optic modulator, and silicon materials have well-established device integration technologies in the semiconductor field. By integrating the electro-optic material layer and the silicon base layer in this heterogeneously integrated chip, the performance of the heterogeneously integrated chip can be improved.

The invention relates to the related technical field of silicon photon chips, in particular to a high-speed silicon optical engine method and device for a silicon optical module, and the method comprises the steps: obtaining basic technical parameters of an optical fiber connection product with the silicon optical module; the refractive index distribution and the waveguide section size of the silicon optical waveguide are configured, and a multi-mode waveguide array is constructed; an electro-optical modulator array is integrated in a multi-mode waveguide array, and the coupling efficiency of waveguides and optical fibers is adjusted in real time through dynamic impedance matching; meanwhile, the high-speed electric drive circuit is used for driving the electro-optical modulator array and optimizing rising edge characteristics / falling edge characteristics of signals, and power consumption adjustment is carried out on the high-speed electric drive circuit. The technical problem that the optical signal quality is reduced due to the fact that the silicon optical waveguide design mostly adopts fixed parameters and mode crosstalk is prone to occurring in a high-speed transmission scene is solved, and the technical effects that the waveguide refractive index is dynamically configured, the multi-mode waveguide array is constructed, the mode crosstalk is effectively reduced, the transmission loss is reduced, and the optical signal transmission quality is improved are achieved.

The invention relates to the technical field of optical measurement, and provides an electro-optical modulator parameter measurement device based on an optical fiber ring resonant cavity, which comprises an optical signal modulation system, an optical fiber ring resonant cavity system and a signal acquisition system which are sequentially connected through optical fibers, the optical signal modulation system comprises a to-be-measured electro-optical modulator which modulates an optical signal and outputs a modulated signal; the optical fiber ring resonant cavity system comprises an optical fiber coupler and a linear piezoelectric ceramic optical fiber stretcher; an annular optical fiber is formed based on an optical fiber coupler, and a plurality of reciprocating optical signal loops are formed in the annular optical fiber. The linear piezoelectric ceramic optical fiber stretcher is used for changing the length of the annular optical fiber; the signal acquisition system acquires signals and calculates parameters. Compared with the prior art, the method has the advantage that the resolution during measurement is improved.

The embodiment of the invention provides a multi-physical field collaborative simulation method and device for a high-speed silicon-based electro-optical modulator, and the method comprises the steps: building a physical model of the electro-optical modulator, carrying out the simulation under different bias voltage and temperature conditions, solving a Poisson equation, a carrier continuity equation and a drift diffusion transport equation, and obtaining the corresponding carrier concentration distribution; performing small-signal simulation analysis on the model to obtain corresponding PN junction electrical characteristic parameters; performing waveguide optical mode simulation on the model to obtain corresponding electric field mode distribution and effective refractive index, and calculating the effective refractive index and absorption coefficient change of the waveguide; constructing a traveling wave electrode model, simulating the traveling wave electrode model to solve an S parameter of a traveling wave electrode, and determining a distribution parameter of the no-load traveling wave microstrip line; a load traveling wave transmission line model is constructed in combination with PN junction electrical characteristic parameters, and based on the model, the frequency response characteristics and the modulation bandwidth of the electro-optical modulator at different temperatures are determined, so that the accuracy of a simulation result can be improved.

In the field of ultrastable laser technology, tuning an ultrastable laser maintains its performance indicators without increasing additional lock noise and out-of-loop drift. [Solution] One acoustic-optic modulator and one electro-optic modulator are introduced separately, and the laser device, frequency shift unit, PDH frequency stabilization control unit, and ultra-stable cavity are integrated. [Effects] By changing the frequency of the acousto-optic modulator, high-precision tuning of the ultra-stable laser can be achieved. By changing the frequency of the electro-optic modulator, wide-range tuning of the ultra-stable laser can be achieved, enabling wide-range, high-precision, and dead-zone-free frequency tuning.

Embodiments of this application disclose an electro-optic modulator and a transmitter. The electro-optic modulator includes a first waveguide, a second waveguide, at least one first modulation region, and at least one second modulation region. The first modulation region and the second modulation region are distributed in a first direction in which the first waveguide and the second waveguide extend. Electric fields applied to the first waveguide and the second waveguide in the first modulation region have some features different from features of electric fields applied to the first waveguide and the second waveguide in the second modulation region, so that an absolute value of an optical path difference generated by the first waveguide in the first modulation region is approximate to or equal to an absolute value of an optical path difference generated by the second waveguide in the second modulation region.

The invention relates to an aerosol particle scattering characteristic experimental platform and experimental method based on a Pockels effect, and belongs to the technical field of optical measurement. The experimental platform comprises an optical platform, an aerosol particle transport system, an optical path system and a data processing system, the aerosol particle conveying system comprises a combustion chamber, a dust aerosol generator, a water mist aerosol generator, a pipeline and an aerosol jet hole; the combustion chamber, the dust aerosol generator and the water mist aerosol generator are all placed outside a room where the optical platform is located, and the light path system is placed on the indoor optical platform; all parts of the data processing system are placed inside or on the top of the cabinet, and the cabinet is close to the optical platform. According to the aerosol particle scattering characteristic experiment platform based on the Pockels effect, the electro-optical modulator based on the Pockels effect and the phase-locked demodulation technology are used, the Mueller matrix measurement time can be shortened, and the measurement precision is improved.

This disclosure provides a signal monitoring method and apparatus, electronic devices, computer-readable storage media, and computer program products applicable to an electro-optic modulator. The signal monitoring method includes inputting a modulated voltage signal to the modulation circuit of an electro-optic modulator, the modulated voltage signal being obtained by superimposing a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wavelength voltage Vpi of the electro-optic modulator and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal; obtaining a photoelectric conversion detection signal corresponding to the output optical signal of the electro-optic modulator; and monitoring the presence of the pulse voltage signal in the modulated voltage signal based on the photoelectric conversion detection signal.

A gate apparatus configured to perform an XOR operation on received input signals to provide a logical output signal, y. The apparatus includes at least one first signal input adapted to receive a first input signal; and at least one second signal input adapted to receive a second input signal. At least one of the received input signals is split into a first split signal portion fed to a photo diode to generate an electrical photocurrent supplied to a junction node, and a second split signal portion combined with at least a signal portion of the other signal received at the second signal input to generate a combined optical output signal supplied to an electro-optical modulator to provide the logical output signal, y. The electro-optical modulator is driven by a photocurrent processing unit having an input connected to the junction node.

The invention discloses a dual-drive differential thin film barium titanate electro-optical modulator. Comprising a narrow linewidth laser, a first optical fiber waveguide coupling module, a second optical fiber waveguide coupling module, a first 1 * 2 optical beam splitter, a second 1 * 2 optical beam splitter, a first radio frequency module, a second radio frequency module, a GSGSG coplanar traveling wave electrode structure, a first waveguide and a second waveguide, wherein the GSGSG coplanar traveling wave electrode structure consists of a first ground electrode, a first signal electrode, a second ground electrode, a second signal electrode and a third ground electrode; the invention relates to an a-axis oriented barium titanate film and a substrate. After beam splitting, input laser is respectively injected into two parallel waveguides which are prepared on the barium titanate film and penetrate through the GSGSG structure. The first radio frequency module and the second radio frequency module apply composite modulation signals including direct current bias and differential radio frequency signals to the signal electrodes, so that the refractive indexes of the two waveguides have opposite sign changes to realize push-pull modulation, and modulated optical signals are output after beam combination. By means of the dual-drive differential and GSGSG electrode structure, the modulation efficiency is improved, and meanwhile the anti-interference capacity and stability of the device are remarkably improved.

The invention relates to an electro-optical modulator and a method of operating the electro-optical modulator. An electro-optical modulator includes: a substrate; an optical waveguide disposed on the substrate; and a first graphene layer such that input light is absorbed by the electro-optical modulator during operation. The electro-optical modulator is configured to operate at a wavelength of 8 microns to 15 microns.

The application provides a silicon substrate removing method based on C2W bonding in a chip, and belongs to the technical field of electro-optical modulators.The method comprises the following steps: forming a waveguide core on a substrate, and depositing a first passivation layer, wherein the first passivation layer covers the substrate and the waveguide core; forming metal grooves on two sides of the waveguide core, and forming metal electrodes in the metal grooves; depositing a second passivation layer, wherein the second passivation layer covers the metal electrodes and the first passivation layer; performing opening on the metal electrodes to form a hole structure; forming a protective layer on a region corresponding to the metal electrodes above the second passivation layer, and the protective layer covers the metal electrodes through the hole structure; bonding a region corresponding to the waveguide core above the second passivation layer with a chip; removing the silicon substrate in the chip after bonding; and removing the protective layer.The scheme shortens the device preparation time and reduces the cost.

This invention discloses a method and system for measuring the frequency response of an electro-optic modulator based on a spectral analyzer. The system includes a laser, a 95:5 single-mode fiber splitter, an optical power meter, an electro-optic modulator, a control power supply, an RF signal generator, and a spectral analyzer. The measurement method includes the following steps: calculating a calibration factor to correct optical power drift through optical path splitting, driving the modulator by applying several discrete single-frequency RF points, and measuring the carrier power P0(f) using the spectral analyzer. i ) and the first-order sideband power P1(f i ), and determined by the power ratio R(f) i )=10 (P1‑P0) / 10 Combining the Jacobi–Anger expansion / Bessel function relation, the phase modulation index β(f) is solved by inverse solution. i Then, the phase transfer function H(f) at each frequency point is calculated and fitted. i The continuous frequency response S of the modulator is obtained. 21 This invention simplifies the testing process, reduces reliance on high-speed photodetectors and vector network analyzers, and enables high-precision electro-optic response testing of electro-optic modulators at high frequencies.

This application provides an electro-optic modulator chip, a packaging structure, and an electronic device, relating to the field of optical communication technology. The electro-optic modulator chip includes: a first end connected to an input light source, and a second end connected to an output light source and a monitoring end; the input light source is used to transmit an input optical signal to the electro-optic modulator; the electro-optic modulator modulates the input optical signal to obtain a modulated optical signal and a monitoring optical signal, and transmits the modulated optical signal to the output light source and the monitoring optical signal to the monitoring end; the output light source is used to output the modulated optical signal; the monitoring end is used to output the monitoring optical signal; the transmission direction of the optical signal is parallel to the plane of the substrate. The packaging structure includes: a substrate, a monitor, and the electro-optic modulator chip; the electro-optic modulator chip is fixedly mounted on the substrate; the monitor is fixedly mounted on the substrate; the monitor receives the monitoring optical signal output by the electro-optic modulator chip and performs optical power monitoring based on the monitoring optical signal to obtain the monitoring result.

The application discloses a packaging structure, an electro-optical modulator and an optical quantum computer, and relates to the technical field of optical communication. The packaging structure comprises a tube shell, a support and an electro-optical chip. The electro-optical chip is arranged on the tube shell through the support. The support is used for isolating the tube shell and the electro-optical chip. The packaging structure, the electro-optical modulator and the optical quantum computer can inhibit a parasitic mode and improve the electro-optical broadband of the electro-optical device.

This invention discloses a high signal-to-noise ratio modulation transfer frequency stabilization optical path device, including a light source and a frequency stabilization optical path. The light source adopts an internally adjustable fiber collimator, with a 45° reflector behind it. The frequency stabilization optical path behind the 45° reflector includes a half-wave plate and a polarizing beam splitter (PBS). An atomic gas cell and two pyramidal reflectors are sequentially arranged on the probe light path of the PBS. A half-wave plate, a 45° reflector, an electro-optic modulator, another 45° reflector, and a half-wave plate are sequentially arranged on the pump light path. The polarizing beam splitter (PBS) is located at the convergence point of the two optical paths, and a 45° reflector, a frequency stabilization optical path lens, and a photodetector are sequentially arranged behind it. This invention cleverly utilizes a folded optical path design and fine-tunes the beam divergence angle to increase the length and area of ​​the laser-atomic interaction without increasing the system volume. At the same time, it actively controls the splitting ratio of the two frequency-stabilized beams, improving the stability of the frequency stabilization.

The application discloses a single-end distributed optical fiber vibration sensor system and a signal processing method, and relates to the technical field of optical fiber vibration sensors. The system comprises a laser source, an electro-optical modulator, a to-be-measured optical fiber, a piezoelectric ceramic, a 1*2 coupler, a frequency mixer, an oscilloscope and a PC end. The laser source transmits laser to the to-be-measured optical fiber after the laser is loaded with a carrier frequency by the electro-optical modulator. The to-be-measured optical fiber changes the phase of the light conducted in the optical fiber after being affected by external environmental vibration. The piezoelectric ceramic generates a vibration signal to modulate the phase information of the to-be-measured optical fiber, and then transmits the vibration signal to the 1*2 coupler. The 1*2 coupler divides the vibration signal into signal light and local oscillator light, and then transmits the signal light and the local oscillator light to the frequency mixer for coherent mixing. The frequency mixer demodulates the phase change. The PC end demodulates and processes the phase change collected by the oscilloscope to obtain vibration information of the external environment. The single-end distributed optical fiber vibration sensor system has a large dynamic range, a long measurement distance, low cost and measurement stability.

The invention relates to a compound containing a cation represented by the following chemical formula 1, an electro-optical material, an electro-optical modulator, and an optoelectronic integrated circuit. [Chemical Formula 1] In Chemical Formula 1, A, D, L1, L2, R3a, and R3b are as defined in the specification.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores, including (2) compositions / materials / resistive layers comprising NLO chromophores, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores (e.g., methods of poling and / or drying, and the like), (3) uses of NLO chromophores in electro-optic devices (e.g., electro-optic modulators (EOMs)). NLO chromophores disclosed herein not only have large EO effect, but also have fast modulation speed. In addition, NLO chromophores disclosed herein have superior refractive index, photostability and thermal stability compared to other EO Materials. As a consequence, NLO chromophores herein are particularly suited for use as EO materials in connection with low power and small footprint devices, including devices used in data acquisition systems, analog I / O modules, field transmitters, lab and field instrumentation, servo drive control modules, direct current (DC) power supply, alternating current (AC), and / or electronic load.

The invention discloses a long-distance distributed Brillouin optical frequency domain analysis sensing system based on an Er-doped optical fiber, the output light of an electro-optical modulator is connected with a second optical fiber coupler and is divided into two beams which are respectively used for sensing and feedback regulation, and the output light of the electro-optical modulator after feedback regulation is connected with the input of a third optical fiber coupler; the output of the gain compensation controller is connected with the other input of the third optical fiber coupler, the output of the third optical fiber coupler is connected with the input of the fourth optical fiber coupler, one output of the fourth optical fiber coupler is connected with the input of the gain compensation controller, and the other output is connected with the input of the optical fiber isolator; output light of the optical fiber isolator serves as final detection light to enter the first to-be-detected optical fiber; output light of the scrambler and output light of the second laser are input into a first erbium-doped optical fiber together through a wavelength division multiplexer, pump light enters a first optical fiber circulator after being amplified by the first erbium-doped optical fiber, one path of output light is connected to a second to-be-measured optical fiber loop provided with a second erbium-doped optical fiber, and the other path of output light is connected to input of a second circulator; one path of output of the second circulator is connected to the optical fiber reflector, and the other path of output is connected to the photoelectric detector to convert optical signals into electric signals.

The embodiment of the invention provides an electro-optical modulator with a differential electrode assembly and a light quantum computer. The electro-optical modulator with the differential electrode assembly comprises the differential electrode assembly, a grounding electrode assembly, a first matching resistor and a second matching resistor. The differential electrode assembly comprises a positive signal electrode and a negative signal electrode and is used for transmitting electric signals. The ground electrode assembly includes a first ground electrode and a second ground electrode, and the positive signal electrode and the negative signal electrode are located between the first ground electrode and the second ground electrode. The first matching resistor is connected between the positive signal electrode and the first grounding electrode. The second matching resistor is connected between the negative signal electrode and the second grounding electrode. In the extending direction perpendicular to the differential electrode assembly, the distance between the first matching resistor and the second matching resistor is smaller than the distance between the center line of the positive signal electrode and the center line of the negative signal electrode. The distance between the first matching resistor and the second matching resistor is reduced, the total inductance is reduced, and the transmission efficiency is improved.