21 results about "Ring modulation" patented technology

The invention discloses an electromagnetic shielding case formed based on ultrafast laser plasma, and the electromagnetic shielding case comprises an ultrafast laser which is used for emitting ultrafast laser; the phase modulation element is used for carrying out annular modulation on the phase of the ultrafast laser to enable the cross section of a light beam to be in an annular shape; and the focusing device is used for pre-focusing the annular modulation light emitted by the phase modulation element in air to form a hollow cylindrical plasma cylinder, and the plasma cylinder is used for being nested at the periphery of equipment to be shielded so as to realize a signal shielding effect. Therefore, the generation and dissipation process of the ultrafast laser plasma is very rapid and can be completed on the nanosecond-level time scale, rapid response to electromagnetic waves can be achieved, and the method is suitable for occasions where the shielding effect needs to be dynamically adjusted.

The present disclosure relates to an optical ring modulator with photonic crystals. Embodiments of the present disclosure provide an optical ring modulator. The optical ring modulator includes a waveguide including a first semiconductor material having a first doping type, and a second semiconductor material adjacent to the first semiconductor material and having a second doping type. A P-N junction is located between the first semiconductor material and the second semiconductor material. A plurality of photonic crystal layers have an upper surface substantially coplanar with an upper surface of the waveguide structure, wherein each photonic crystal layer is embedded within the first semiconductor material or the second semiconductor material.

A system can include a unit cell of a ring modulator of a coarse wavelength division multiplexing (CWDM) optical link. The unit cell includes a ring resonator including a ring waveguide configured to receive, via a first bus waveguide, an optical signal, and modulate the optical signal to generate a modulated optical signal. The unit cell further includes a multiplexer, disposed between the first bus waveguide and a second bus waveguide, configured to filter the modulated optical signal.

The invention relates to a micro-ring modulation light engine based on glass substrate packaging and a manufacturing method thereof, and the light engine comprises a glass substrate which is provided with a first plate surface and a second plate surface; the micro-ring modulation optical chip and the electric chip are respectively mounted on the first plate surface through a first connecting structure, and the optical chip and the electric chip are electrically connected through an electric interconnection structure formed in the glass substrate; the engine substrate is electrically connected with the second board surface through a second connecting structure, so that the micro-ring modulation optical chip and the electric chip are electrically communicated with an external circuit; and the optical coupling element is optically coupled to the optical port of the optical chip. In the invention, the glass substrate is used as an adapter plate to connect the photoelectric chip and the engine substrate, so that the micro-ring modulation optical chip and the electric chip can be integrated on the glass substrate in a high-density manner through a packaging technology, and the problems of high I / O quantity and high-bandwidth electric interconnection between the micro-ring modulation optical chip and the driving chip can be well solved; the integration level and the photoelectron interconnection density which are far higher than those of a traditional packaging scheme are achieved; through high-density integration, extremely high bandwidth density is realized in an extremely small packaging size, and dual requirements of a CPO / NPO optical engine on extreme performance and compact space occupation can be met.

Embodiments of the present application propose an imaging system based on super-Raleigh limit focusing lens and its application, which can be widely applied in the technical fields of photolithography, biomedical, optical imaging and nanometer structure precision measurement; the system can produce transverse wave vector distribution and excitation and detection vector beams with wave vector range meeting the requirements by wave vector ring modulation on incident linearly polarized light, focus the vector beams to make the focusing field meet the scale requirements, so as to obtain super-Raleigh limit excitation PSF and detection PSF, and obtain a confocal PSF capable of exciting high-order terms of spot intensity by superimposing the excitation and detection PSFs, thereby improving the imaging resolution of the system; on the other hand, the system can use solid and hollow focusing spots formed by focusing vector beams to form an image, and calculate according to the imaging result to reduce interference, so as to obtain a high-resolution detection result far exceeding the Raleigh diffraction limit, and further improve the resolution of the imaging system.

The invention discloses a pumping ring structure-based active optical fiber with high pumping conversion efficiency and an amplifier structure, and relates to the field of active optical fibers and optical fiber amplifiers, the pumping ring structure-based active optical fiber comprises a layered structure which is sequentially arranged from inside to outside, and the layered structure comprises a fiber core, a pumping ring structure, a quartz cladding and a coating layer, the optical fiber is located at the geometric center of the active fiber; the pumping ring structure is arranged around the fiber core and is used for guiding and converging pumping light to gather towards a fiber core area, the pumping ring structure is composed of one or more layers of concentric annular modulation areas, and the refractive indexes of all the layers of modulation areas are gradually increased layer by layer from outside to inside in the radial direction; according to the active optical fiber and amplifier structure, one or more layers of concentric pumping rings with refractive indexes gradually increased layer by layer from outside to inside are arranged in the cladding, and the concentration degree and energy density of pumping light towards a fiber core area can be remarkably improved to a certain extent by utilizing the guiding effect of refractive index gradients on a pumping light propagation path; therefore, higher pumping absorption efficiency and gain performance are realized.

A silicon photonics modulator includes a substrate, a PN junction disposed on the substrate, the PN junction formed by a first L-shaped region doped with a p-type doping abutting a second L-shaped region doped with an n-type doping, a first plurality of regions each having different p-type doping concentrations greater than the first L-shaped region, and a second plurality of regions each having different n-type doping concentrations greater than the second L-shaped region. The silicon photonics modulator includes a first electrical contact on one of the first plurality of regions, a second electrical contact on one of the second plurality of regions, and multiple grating pillars doped with the n-type doping or the p-type doping, each of the multiple grating pillars spaced apart from the PN junction and spaced apart from one another.

The invention discloses a high-linearity modulator based on multi-waveguide coupling, and belongs to the technical field of semiconductor devices. The high-linearity modulator comprises an optical splitter, a phase tuning unit, a micro-ring coupling waveguide group and a micro-ring modulation unit, and is characterized in that the optical splitter is used for carrying out equal-proportion light splitting on an optical waveguide signal, dividing the optical waveguide signal into N beams of optical waveguide signals and outputting the N beams of optical waveguide signals; the phase tuning unit is used for tuning the phase and amplitude of the N beams of optical waveguide signals by changing the waveguide refractive index and loss; the micro-ring coupling waveguide group outputs a modulated optical signal; and the phase of a micro-ring light field in a ring of the micro-ring modulation unit is changed through electro-optical modulation so as to modulate the signal, and the optical signal with the maximum optical power is used as an output modulation signal of the high-linearity modulator. According to the high-linearity modulator disclosed by the invention, high-order harmonic components are remarkably suppressed while the advantage of small size is maintained, so that the dynamic range of the modulator reaches a high-linearity level.

Embodiments herein relate to techniques for baseline wander (BLW) compensation. The technique may include identifying a data stream that is to be modulated by a ring modulator of an optical transmitter, wherein the data stream has a frequency operable to cause thermal-based BLW of an optical output of the optical transmitter. The technique may further include adjusting a time-varying direct current (DC) voltage bias of the ring modulator based on the frequency of the data stream. Other embodiments may be described and / or claimed.

The present application discloses an optical computing method based on an optical computing network structure, a device, a system, and a medium. The optical computing network structure comprises a plurality of preset computing units, and each preset computing unit comprises a Mach-Zehnder interferometer, a broadband phase shifter, and a plurality of micro-ring resonators. The method comprises: determining first modulation parameters for micro-ring resonators from a preset micro-ring modulation parameter range, wherein during matrix-matrix multiplication, the micro-ring resonators on an upper arm and a lower arm of an interferometer have the same first modulation parameter, and during different matrix-vector multiplications, any two of the micro-ring resonators on the upper arm and the lower arm of the interferometer have different first modulation parameters; according to a second modulation parameter, each broadband phase shifter performing phase delay modulation on light passing through the Mach-Zehnder interferometer, and according to a first modulation parameter, each micro-ring resonator performing phase modulation on the light passing through the Mach-Zehnder interferometer; and inputting an optical signal to be computed into an optical computing network structure to obtain an optical computing result output by the optical computing network structure.

A photonic integrated circuit includes a first ring-shaped optical waveguide optically coupled to both a second optical waveguide and a third optical waveguide within a first optical coupling region and a second optical coupling region, respectively. An inner silicon region is formed along an inner side of the first ring-shaped optical waveguide. Tab-shaped N-type doping regions and tab-shaped P-type doping regions are formed in alternating positions within the first ring-shaped optical waveguide and the inner silicon region within the first optical coupling region to form a first interdigitated PN diode configuration within the first optical coupling region. Tab-shaped N-type doping regions and tab-shaped P-type doping regions are also formed in alternating positions within the first ring-shaped optical waveguide and the inner silicon region within the second optical coupling region to form a second interdigitated PN diode configuration within the second optical coupling region.

The invention discloses an intensity modulation method, system and device for quantum key distribution and a medium, belongs to the technical field of optical transmission safety communication, and is applied to an intensity modulation system. Wherein the intensity modulation system comprises an asymmetric waveguide modulation module and an electrically tunable micro-ring modulation module, the asymmetric waveguide modulation module comprises a non-uniform light beam splitting unit and a uniform light beam combining unit, and the method comprises the following steps: performing non-uniform beam splitting on an input light signal through the non-uniform light beam splitting unit; obtaining a first light beam splitting signal and a second light beam splitting signal; carrying out intensity attenuation and optical signal delay difference compensation on the first light beam splitting signal through an electrically tunable micro-ring modulation module to obtain a modulated first light beam splitting signal; according to the invention, uniform beam combination is carried out on the modulated first light beam splitting signal and the second light beam splitting signal through the uniform light beam combination unit to obtain the output light signal, so that the intensity modulation of the input light signal is realized, and therefore, high extinction ratio intensity modulation can be realized.

A photonic integrated circuit includes a first ring-shaped optical waveguide optically coupled to both a second optical waveguide and a third optical waveguide within a first optical coupling region and a second optical coupling region, respectively. An inner silicon region is formed along an inner side of the first ring-shaped optical waveguide. Tab-shaped N-type doping regions and tab-shaped P-type doping regions are formed in alternating positions within the first ring-shaped optical waveguide and the inner silicon region within the first optical coupling region to form a first interdigitated PN diode configuration within the first optical coupling region. Tab-shaped N-type doping regions and tab-shaped P-type doping regions are also formed in alternating positions within the first ring-shaped optical waveguide and the inner silicon region within the second optical coupling region to form a second interdigitated PN diode configuration within the second optical coupling region.

The invention provides a micro-ring modulator and a multi-channel micro-ring modulation system, and belongs to the technical field of semiconductors. The micro-ring modulator comprises a silicon waveguide structure, the silicon waveguide structure comprises a flat plate layer and a Z-shaped ridge waveguide which are arranged in a stacked mode, the Z-shaped ridge waveguide and an area located under the Z-shaped ridge waveguide form an interface area, the interface area is provided with a PN junction interface, and the PN junction interface is connected with the flat plate layer. The PN junction interface comprises a first vertical interface, a horizontal interface and a second vertical interface which are connected in sequence, and a P region and an N region are arranged on the two sides of the PN junction interface respectively; the P region and the N region are sequentially provided with a lightly doped region, a medium doped region and a heavily doped region in the width direction, the doping concentration of the lightly doped region, the doping concentration of the medium doped region and the doping concentration of the heavily doped region are sequentially increased, the lightly doped region of the P region and the lightly doped region of the N region are in butt joint, and the PN junction interface is formed at the butt joint position. According to the micro-ring modulator provided by the invention, relatively high modulation efficiency and relatively large bandwidth can be ensured at the same time.

Embodiments of the present invention provide a semiconductor device and a method for operating a silicon ring modulator. The semiconductor device includes: a first bus waveguide; a first silicon ring optically coupled to the first bus waveguide; a spare silicon ring optically coupled to the first bus waveguide; a first heater and a second heater configured to heat the first silicon ring and the spare silicon ring, respectively; and a first switch, wherein the first switch is configured to electrically couple the first silicon ring to a first radio frequency (RF) circuit when the first switch is in a first switch position, and is configured to electrically couple the spare silicon ring to the first RF circuit when the first switch is in a second switch position.

The application relates to the field of optical communication and discloses a photonic integrated multi-wavelength coherent transmitter and a transmitting method, which comprises a multi-wavelength light source, a transmitter modulation module and an optical amplifier; the transmitter modulation module comprises a total beam splitter, a first micro-ring modulation sub-module, a second micro-ring modulation sub-module, a polarization rotator and a polarization light combiner; the total beam splitter divides the light wave generated by the multi-wavelength light source into a first light wave and a second light wave, and respectively sends the first light wave and the second light wave to the first micro-ring modulation sub-module and the second micro-ring modulation sub-module for modulation to obtain a first optical signal and a second optical signal; the polarization rotator performs polarization rotation on the second optical signal; and the polarization light combiner couples the first optical signal and the polarization-rotated second optical signal to obtain a composite optical signal which is amplified by the optical amplifier and then transmitted. Compared with the existing Mach-Zehnder modulator-based coherent transmitter, the application can improve the integration level by reducing the number of modulators.

The application discloses a kind of micro-ring wavelength division multiplexing systems and its optical channel monitoring method, device, applied to optical fiber communication technical field, to solve the problem of accurately identifying the shift of micro-ring operating wavelength, multiple optical label generation module generates the optical signal label corresponding to each laser one by one;Laser adopts received optical signal label to modulate the light source signal generated by itself to obtain modulated light source signal;Optical coupler carries out wavelength division multiplexing to each modulated light source signal and is transmitted to micro-ring modulation array by waveguide;Micro-ring modulator array is transmitted to the optical signal that is matched with itself tuning wavelength by each micro-ring modulator;Optical signal detection module determines the shift of micro-ring modulator operating wavelength according to the current optical signal label in the optical signal that each micro-ring modulator respectively outputs and the optical signal label of target laser corresponding to micro-ring modulator;It improves the detection accuracy of the shift of micro-ring modulator operating wavelength.

Embodiments herein relate to techniques for baseline wander (BLW) compensation. The technique may include identifying a data stream that is to be modulated by a ring modulator of an optical transmitter, wherein the data stream has a frequency operable to cause thermal-based BLW of an optical output of the optical transmitter. The technique may further include adjusting a time-varying direct current (DC) voltage bias of the ring modulator based on the frequency of the data stream. Other embodiments may be described and / or claimed.

A microring modulator device, method and optical device, the microring modulator device comprising: a ring-shaped waveguide associated with N+ doping and P+ doping, wherein the N+ doping and P+ doping have two discontinuities over the ring-shaped waveguide, thereby creating a modulation segment of the ring-shaped waveguide, a calibration segment of the ring-shaped waveguide, and two gap sections, wherein the modulation segment and the calibration segment are electrically isolated from each other; a second waveguide, optically coupled to the ring-shaped waveguide, and to a light source; a first driver circuit for driving an input signal to be modulated to the modulation segment; a second driver circuit for driving a calibration signal to the calibration segment, thereby affecting a refraction index of the ring-shaped waveguide and a resonance frequency of the ring-shaped waveguide; and a non-invasive device for measuring light intensity on the second waveguide without reducing light transmitted through the waveguide.

The application discloses a microwave photon self-interference elimination and signal delay down-conversion device and method, and belongs to the field of optical communication and microwave technology.The device comprises the following steps: introducing the differential delay of reference self-interference signals and received self-interference signals based on a ring modulation structure, simultaneously using polarization control to realize amplitude matching and reverse operation, and finally eliminating the self-interference signals in the optical domain; and loading a local oscillation signal, increasing a dispersion medium, adjusting laser wavelength, group dispersion coefficient and other parameters, and simultaneously realizing the down-conversion and delay functions of expected signals.The application realizes the elimination and delay down-conversion of self-interference signals, has simple structure and high practicability, and can be widely applied in phased array radars, electronic warfare and wireless communication electronic systems.

A modulator including multiple modulation units each including multiple ring modulators and an output waveguide configured to multiplex beams that have passed through the ring modulators included in the modulation units and output a multiplexed beam. The modulation units each include a sorting waveguide that guides a beam inputted from outside to the ring modulators. All the ring modulators included in the modulation units have resonance frequencies adjusted to differ from each other. A modulator, modulation system, and transmission module for increasing the data communication capacity without having to increase the number of light sources can be provided.