346 results about "Micro ring resonator" patented technology

The current invention provides methods for detecting trace analytes in solution or suspension using coupled micro-ring resonators. The methods of the current invention determine the presence and concentration of the target analytes in real time by exposing the micro-ring resonator to the analyte and determining the resulting rate of change of resonance wavelength experienced by a sensing micro-ring resonator as compared to a reference micro-ring resonator.

The invention discloses a silicon-based integrated optical vector-matrix multiplier, which consists of nano-wire micro-ring resonators arranged periodically, and is used for realizing the multiplication of an N*N matrix and an N*1 vector, wherein elements in the N*N matrix and the N*1 vector are all 0 or 1. The optical vector-matrix multiplier is prepared from a silicon-on-insulator material, the basic units of the multiplier are the nano-wire micro-ring resonators (MRR), and the basic structure is the MRRs which are arranged in N*N and are provided with a thermal modulation mechanism respectively. The silicon-based integrated optical vector-matrix multiplier adopts the prior art, so that the device has small volume, low power consumption and good expansibility and is convenient to be integrated with an electrical element; the silicon-based integrated optical vector-matrix multiplier adopts laser pulses to transmit information, so the speed is high and the delay is short; a digital mode is utilized for processing signals, so the defect that an analog optical computing system has low accuracy and poor programmable capacity is avoided; and waveguides with a great refractive index difference are utilized to transmit light, so the problem that the space diversity efficiency of the conventional optical vector-matrix multiplier is low is avoided.

The invention discloses a 4*4 non-blocking optical router based on an active micro-ring resonator. The optical router comprises four parallel waveguide micro-ring resonator 1*2 optical switches and four crossed waveguide micro-ring resonator 1*2 optical switches, wherein the four parallel waveguide micro-ring resonator 1*2 optical switches are connected to the four crossed waveguide micro-ring resonator 1*2 optical switches, so that the optical router comprises only four input terminals and four output terminals, and each waveguide corresponding to the component is sequentially coupled with four micro-ring resonators from the input terminals to the output terminals, wherein two micro-ring resonators are used for downloading the optical signals at the input terminals of the waveguides to the output terminals of the other two waveguides; and the other two micro-ring resonators are used for uploading the optical signals at the input terminals of the two waveguides to the output terminals corresponding to the waveguides, thus achieving the non-blocking router switch among four two-way communication ports.

The invention discloses a photonic neural network convolutional layer chip based on a micro-ring resonator. The chip is universal to all deep learning technologies including convolutional calculation.According to the chip, vectorized to-be-calculated signals are loaded on different optical wavelengths by means of a wavelength division multiplexing mode. The micro-ring resonator and a balance photoelectric detector form a weight matrix, convolutional calculation of the to-be-calculated signals and the weight matrix can be completed, and a convolutional result is output. By utilizing the tunability of the integrated micro-ring resonator, the convolutional calculation of any numerical value can be realized. In addition, the speed of the convolutional calculation is increased to a constant level (that is, the speed of light) by using light as a numerical calculation medium, and the advantage of a higher energy efficiency ratio is achieved.

A tunable semiconductor laser device is presented. The device comprises a laser structure formed by at least two waveguides and an active region located within at least a segment of one of the waveguides; and comprises a tunable spectral filter optically coupled to the laser structure. The tunable spectral filter includes at least two filtering elements, at least one of them being a microring cavity.

The invention relates to an integrated reconfigurable optical add / drop multiplexer based on a microring resonator. The basic elementary unit of the element comprises a transverse waveguide and a vertical waveguide which are used to form a perpendicularly crossing waveguide; the transverse waveguide contains an input end and a straight-through end; the vertical waveguide comprises an upload end and a download end; the basic elementary unit also comprises a first microring and a second microring which are cascaded to form cascade two-microring structure with different radiuses, and the cascade two-microring structure with different radiuses composed of the first microring and the second microring is arranged in the overlap area of the straight-through end of the transverse waveguide and the download end of the vertical waveguide.

Apparatus and methods that compensate for the thermally-induced drift of the resonance frequency of a closed-loop resonator include, in an exemplary embodiment, a waveguide-based Mach-Zehnder interferometer (MZI) and an overcoupled, waveguide-based microring resonator. The temperature-induced red-shifting ring resonance can be balanced by a spectral blueshift with temperature of the MZI. To stabilize the resonance of the ring at a given wavelength, the change in optical path lengths with temperature of the ring and the MZI should be equal and opposite. The interplay of nonlinear change in phase of ring resonator with temperature and linear change in phase of MZI with temperature, along with matching the period of this phase change, gives rise to perfect oscillation in the combined system resonance with temperature.

The invention discloses an integrated optical filter with center wavelength and filter bandwidth both adjustable independently. The optical filter is composed of tunable micro-ring resonators as basic units and comprises an input optical waveguide, a first-level high-order optical filter, an intermediate optical waveguide, a second-level high-order optical filter and an output optical waveguide. The first-level high-order optical filter is used for primary filtering of light guided by the input waveguide; the second-level high-order optical filter is used for secondary filtering of light after the primary filtering. The construction method of the integrated optical filter is that multiple tunable micro-ring resonators are connected in series to form the high-order optical filters with flat-top filter curves; two levels of the high-order optical filters with center wavelength adjustable independently are cascaded to form the integrated optical filter with the center wavelength and filter bandwidth both adjustable independently.

The embodiment of the invention discloses an optical switch relating to the optical communication field and solves the problems of low extinction ratio and sensitivity to optical signal wavelength of the existing optical switch. In the embodiment of the invention, a group of micro-ring resonators are arranged on two waveguide arms to control the phase position outputting the optical signal in the waveguide arms, thus, the state of the optical signal output by an output beam splitter at last in the optical switch can be adjusted to realize the function of the optical switch. The embodiment of the invention is mainly used in a device directly carrying out optical switch and optical router in optical communication, saves O / E conversion and E / O conversion when the optical communication carries out router switch.

The invention discloses a low-loss four-port non-blocking optics router based on micro-ring resonators. Through six cross waveguide micro-ring resonators and a parallel waveguide micro-ring resonator, an input end of a first port is coupled to an output end of a fourth port. An input end of a second port is coupled to an output end of the first port. An input end of the fourth port is coupled to an output end of a third port. The input end of the first port is coupled to the output end of the third port. An input end of the third port is coupled to an output end of the second port. The input end of the second port is coupled to the output end of the fourth port. A seventh micro-ring resonator is used for being connected with an optical channel from the fourth port to the first port and an optical channel from the second port to the third port. Due to the fact that the number of the micro-ring resonators is reduced to seven, the low-loss four-port non-blocking optics router based on the micro-ring resonators has the advantages of improving utilization efficiency of devices, simplifying the structure of a switch, decreasing area of the switch, reducing insertion loss and crosstalk of the switch due to the fact that the number of the cross waveguide micro-ring resonators is reduced to six, enhancing extendibility of the devices, being prone to establishing an on-chip optical interconnection network architecture and achieving high-speed transmission and exchange of optical signals.

The invention discloses an optical network-on-chip system based on wavelength allocation and a communication method of the system, which mainly solve the problem of too many adopted wavelength, complex optical router structure and poor network expansibility when the conventional optical network-on-chip system adopts a wavelength division multiplexing technology. An optical router of the optical network-on-chip system comprises a criss-cross waveguide, four same micro-ring resonators and three groups of optical basic parallel switch units, and an optical signal is bidirectionally transmitted by single waveguide. The communication method of the optical network-on-chip system comprises the following steps: building a two-dimensional coordinate and distributing wavelength; determining the coordinates of a source node and a target node; according to the source node and the target node, determining the communication path of the optical signal, and modulating the wavelength; making an appointment to an optical link by making an appointment to the input port and the output port of the optical router of an intermediate steering node; and transmitting the optical signal along the appointed optical link, and releasing the optical link. According to the optical network-on-chip system, the wavelength use ratio of a wavelength division multiplexing optical network-on-chip can be effectively improved, the structure of the optical router is simplified, and the optical network-on-chip system is suitable for inter-core interconnection and communication of the optical network-on-chip.

Devices for generating a laser beam are disclosed. The devices include a silicon micro ring having at least one silicon optical waveguide disposed at a distance from the micro ring. The radius and the cross-sectional dimension of the microring, the cross-sectional dimension of the waveguide, and the distance between the micro ring and the waveguide are determined such that one or more pairs of whispering gallery mode resonant frequencies of the micro ring are separated by an optical phonon frequency of silicon. Methods of manufacturing a lasing device including a silicon micro ring coupled with a silicon waveguide are also disclosed.

The execution mode of the invention provides an optical switching device and a control method thereof, which belong to the field of network communication. The device comprises an input wave guide, a 1*2 beam splitter and two output wave guides; the input end of the 1*2 beam splitter is connected with the input wave guide, and the two output ends of the 1*2 beam splitter are respectively connected with the two output wave guides; the device also comprises at least one microring resonator and is provided with at least two coupling regions; and the two output wave guides are respectively connected with the arranged coupling regions and the microring resonator. The device and the method have the advantages of less waste and high extinction ratio.

Described are an FSK modulator and a method for large-alphabet FSK modulation. The FSK modulator and the method are based on filtering of a multi-tone optical source such as a mode-locked laser which provides a comb distribution of tones. A frequency-selective component selects for transmission a subset of the tones. In various embodiments the frequency-selective component is a Mach-Zehnder interferometer filter or a microring resonator filter. A second frequency-selective component selects a subset of the tones from the comb distribution provided by the first frequency-selective component. Still more frequency-selective components can be used according to the number of tones supplied by the multi-tone optical source to the FSK modulator. The optical signal exiting the last frequency-selective component includes only a single tone which corresponds to the symbol to be transmitted.

The invention discloses an optical network-on-chip system supporting multicast communication. The optical network-on-chip system supporting multicast communication mainly solves the problems that an existing optical network-on-chip is low in multicast communication efficiency and complex in network structure, and blocking exists. The optical network-on-chip system structurally comprises a two-stage optical switching network, an IP core, an electric-to-optical conversion unit and an optical-to-electric conversion unit. The two-stage optical switching network is composed of a first stage optical switching network and a second stage optical switching network. Through reasonable arrangement of waveguides and multi-wavelength micro-ring resonators in the first stage optical switching network and waveguides and multi-wavelength micro-ring resonators in the second stage optical switching network, the situation that each communication node can transmit optical signals to all the other communication nodes simultaneously can be guaranteed, and therefore a multicast communication function is achieved. According to the optical network-on-chip system, due to the use of the multi-wavelength micro-ring resonators, the number of micro-ring resonators is reduced, and complexity of the networks is lowered. The optical network-on-chip system can effectively improve the multicast communication efficiency of the optical network-on-chip, simplifies the structure of the optical switching network, and is suitable for inter-core optical interconnection of the optical network-on-chip.

The invention relates to a micro-ring resonator-based system and method for generating an optical frequency comb with an adjustable frequency interval, and aims at solving the problems that an existing system for generating the optical frequency comb is poor in stability and the frequency interval of the optical frequency comb is fixed or is adjustable only within a few of free spectrum ranges. The system comprises a closed optical fiber ring cavity which is formed by connecting an optical amplifier, an optical isolator, a polarization controller, an upload / download micro-ring resonator, a beam splitter and an adjustable dual-wavelength filter through a single mode fiber in series; and the beam splitter is located behind the upload / download micro-ring resonator along the propagation path of a laser signal in the optical fiber ring cavity. By the system and the method provided by the invention, the optical frequency comb with the freely adjustable frequency interval can be generated; meanwhile, the self-terminating phenomenon of a traditional micro-ring resonator-based system is eliminated; the micro-ring resonator-based system and method have the advantages of being simple to operate and convenient to adjust; and the system is easy to integrate.

The invention discloses an on-chip integrated optical digital-to-analog converter based on a silicon-based nanowire waveguide. The on-chip integrated optical digital-to-analog converter comprises N laser devices, a modulation multiplex integral structure and a photoelectric detector. The modulation multiplex integral structure comprises a trunk waveguide L0, N cascaded silicon-based nanowire waveguide micro-ring resonators (MRR1, MRR2...MRRN) and N bent waveguides (L1, L2...LN), the N laser devices are connected with the uploading ends of the N bent waveguides (L1, L2...LN) respectively, the photoelectric detector is connected with the straight-through end of the trunk waveguide L0, and N is a natural number. According to the on-chip integrated optical digital-to-analog converter, the advantages that the silicon-based waveguide is compact in structure, low in power consumption, compatible with the CMOS process and the like are fully achieved, the high speed and high resolution in the DAC process can be achieved, and the integration and miniaturization of the optical DAC can be achieved.

The invention discloses a reconfigurable optical add-drop multiplexer (an ROADM structure) for realizing 16 channels with multiple orders. The ROADM structure comprises an input part, a first-order filtration area, a second-order filtration area, a local download area, a combiner and an output part which are connected through nanometer wire waveguides. The ROADM structure has a certain width by utilizing the free spectral width of a micro-ring resonator and filters a plurality of paths of incident wavelengths with respective orders so as to ensure that the wavelength number in each download waveguide is reduced progressively and finally realize the single wavelength download in each output port, thereby reducing the temperature control difficulty and improving the response speed of devices.

The invention discloses a reconfigurable network on a mating plate and a configuration method and is intended to solve the problem that it fails to flexibly configure a network in the prior art. The invention is characterized in that a micro ring resonator optical switch is introduced in the connection of an IP nucleus and an adjacent light router; the state of the micro ring resonator optical switch is controlled for different applications; the light router connected to the IP nucleus is flexibly selected such that a network reconstruction can be realized. The configuration steps are: (1) determining the optimal dimension of the network needed; (2) determining an initial set based on the communication relations and traffic loads among the IP nucleuses; (3) adding the IP nucleuses which are not included in the initial set into the initial set based on certain rules or forming a new set; (4) carrying out a layout based on the communication relations in a set or among different sets according to a certain sequence. According to the invention, the restriction of a definite network composition is broken, the reconstruction of the network composition is realized based on specific characteristics of the applications through changing the topology connection relation, the design flexibility is guaranteed and the network performance is optimized.

The invention discloses an integrated optical vector-matrix multiplier. The optical vector-matrix multiplier comprises extensible inner product operation units formed by a plurality of tunable micro-ring resonators which have a parallel waveguide structure and are arranged in a one-dimensional manner. The optical vector-matrix multiplier realizes a multiplication between a matrix M*N and a vectorN*1 by employing the integrated optical mode, wherein elements in the matrix and the vector are all binary numbers (0 or 1) and M and N are natural numbers. The integrated optical vector-matrix multiplier based on the micro-ring resonators is high in integrated level, good in scalability and convenient in integration with electric elements, and enables to raise information transfer rates, reduce information transfer delays, avoid disadvantages of poor precision and weak programmable ability of analog optical computing systems and solve the problem of low space diversity efficiency of traditional optical vector-matrix multiplier.

The invention discloses an integrated reconfigurable optical add-drop multiplexer. A reconfigurable optical add-drop multiplexer unit adopts a cascade adjustable double microring resonator as a basic unit and comprises a plurality of cascade adjustable double microring resonators, wherein each cascade adjustable double microring resonator comprises two straight waveguides which are not crossed and two disc waveguides with different radiuses; the two disc waveguides are positioned between the two straight waveguides and keep preset coupling distances with the two straight waveguides; and a preset coupling distance is also kept between the two disc waveguides. In the invention, mature process techniques are used, so the element has a compact structure and has high expandability and stability; a method of cascading double rings with different radiuses is used to expand a free spectrum range (FSR), so the number of channels is increased and the information throughput of the element is increased; the stability of the element is improved by using the filter characteristic of a double ring flat top; the resonance wavelength can be adjusted dynamically by using the thermo-optic effect to adjust microrings; and thus, the reconfigurable optical add-drop multiplexer if formed.

The invention discloses a two-bit optical decoder based on a micro-ring resonator. The basic structure of the two-bit optical decoder is the micro-ring resonator, which is made by silicon-based nanowire waveguide. The optical decoder consists of two annular waveguides and three bent waveguides; two electric signals and a continuous optical signal with a working wavelength are input, and an optical signal is output. Supposing that: when a modulation voltage of a micro ring is a high level, the micro-ring resonator resonates, and when the modulation voltage of the micro ring is a low level, themicro-ring resonator does not resonate; an optical code of a two-bit electric signal can be obtained at the output end of the optical signal, so that the instrument finishes the function of the two-bit optical decoder. The two-bit optical decoder has the outstanding advantages that: by using the two-bit optical decoder, conversion from an electric signal to an optical signal can be realized, and the electric signal can be decoded optically at the same time. By using the ready-made process technology, the decoder has small volume, low power consumption, high speed and expansion and good application prospect in photon computers and optical communication networks, and is integrated with an electric element conveniently.

The present invention provides a WDM optical system that includes a tunable filter for selecting one or more optical channels from a WDM optical signal. A portion of a WDM signal enters a first optical filter stage that exhibits a periodic transmission spectrum and possesses individually tunable filter elements. A second optical filter stage receives throughput from the first filter stage and has a periodic transmission spectrum and individually tunable filter elements. A controller electrically communicates with the optical filter to select individual optical channels from the portion of the wavelength division multiplexed optical signal received through the filter input port; each selected optical channel is output via a filter throughput port. In an exemplary embodiment, each tunable filter element is a micro-ring resonator and the micro-ring resonators in the first filter stage have a different free spectral range (FSR) than the micro-ring resonators of the second filter stage.

The invention discloses a 4*4 nonblocking optical switching network based on five microring resonators. The 4*4 nonblocking optical switching network based on the five microring resonators comprises four crossing waveguide microring 1*2 photoswitches and one parallel waveguide microring 2*2 photoswitch, wherein the four crossing waveguide microring 1*2 photoswitches are respectively and directly connected with input and output ends; a first end input port 1 and a fourth end output port 4' are coupled by the microring resonator 1; not only the first end input port 1 and a third end output port 3', but also a fourth end input port 4 and a second end output port 2' are coupled by the microring resonator 2; a third end input port 3 and the second end output port 2' are coupled by the microring resonator 4; not only the third end input port 3 and a first end output port 1', but also a second end input port 2 and the fourth end output port 4' are coupled by the microring resonator 3; and the microring resonator 5 is used for connecting optical channels from the fourth end input port 4 to the first end output port 1' and from the second end input port 2 to the third end output port 3'. According to the 4*4 nonblocking optical switching network based on the five microring resonators, the nonblocking routing and switching of four bidirectional ports is completed through the five microring resonators; the microring resonators are decreased to five; in other words, the microring resonators are decreased by 37.5%; therefore, the insertion loss, the power consumption and the area are reduced; and crosses are reduced to six, so that the insertion loss and the crosstalk of the switching network are decreased, and the expandability of an optical interconnection network is enhanced.

A resonator structure is presented comprising a closed loop resonator waveguide having a width varying over the circumferential region of the resonator waveguide. The resonator structure can be used in various applications, such as optical filters, lasers, modulators, spectrum analyzers, wavelockers, interleave filters, and optical add drop multiplexers.

The invention discloses a low obstruction communication router capable of realizing a network on an optical chip and a communication method thereof. In the current network on chip, Mesh structure network obstruction is large and single node obstruction can probably influence other node communication. By using the router and the method of the invention, the above problem can be solved. The router comprises: N optical waveguides and M micro-ring resonators, which are used to construct the optical transmission network of the network on chip. The horizontal optical waveguides and the vertical optical waveguides are in a cross layout, and the other annular optical waveguides are successively arranged from inside to outside and are intersected with the horizontal optical waveguides and the vertical optical waveguides. The micro-ring resonators are selectively arranged on optical waveguide cross point positions. The communication method adopts a data packet recycling rule based on a hop count or time. When a built chain packet generates the obstruction during a process of reserving an optical transmission network communication path, link resources of the optical transmission network can be timely released according to the recycling rule. By using the router and the method of the invention, the obstruction situation of the network on chip and energy consumption and losses during optical signal transmission on chip can be effectively reduced. Network performance can be increased.

The invention provides a frequency shift keying (FSK) optical modulation signal generator based on a silicon-based micro ring resonator, comprising an adjustable laser, a radio frequency signal generator, a Mach-Zehnder modulator, a data source and a silicon-based micro ring resonator system, wherein the adjustable laser is connected with the input end of the Mach-Zehnder modulator to transmit optical carrier signals, the radio frequency signal generator is connected with the radio frequency interface of the Mach-Zehnder modulator to transmit high frequency electric signals, the output end of the Mach-Zehnder modulator is connected with the silicon-based micro ring resonator system to transmit carrier suppression optical signals, and the data source is connected with the silicon-based micro ring resonator system to transmit electric signals with adjustable amplitude. The silicon-based micro ring resonator used in the invention has simple structure and small volume, easy integration, simple modulation, convenient control and high modulation velocity which is up to a plurality of Gbit / s, and the radius of the micro ring is only a plurality of microns to dozens of microns.

Methods of manufacturing a lasing device are provided by some embodiments, the methods including: creating a silicon micro ring with a predetermined radius and a predetermined first cross-sectional dimension; creating a silicon waveguide with a predetermined second cross-sectional dimension, the silicon waveguide spaced from the silicon micro ring by a predetermined distance; and wherein the predetermined distance, the predetermined radius, the predetermined first cross-sectional dimension, and the predetermined second cross-sectional dimension are determined so that at least one first whispering gallery mode resonant frequency of the silicon micro ring and at least one second whispering gallery mode resonant frequency of the silicon micro ring are separated by an optical phonon frequency of silicon.

The invention discloses a reflective microring resonator. The reflective microring resonator comprises an upper download type microring resonator, wherein the upper download type microring resonator comprises a microring and a channel waveguide coupled with the microring, a download end of the upper download type microring resonator is provided with a light reflection structure, and the reflectivemicroring resonator further comprises a coupling control module used for controlling the coupling amount of the microring and the channel waveguide to make a group delay state of resonant light in two directions in the reflective microring resonator satisfy the fast and slow light cancellation condition. The invention further discloses a multi-wavelength light delayer, a photon beam-forming method and a photon beam-forming chip. The reflective microring resonator is advantaged in that true wideband light delay can be achieved, and the delay amount can be flexibly adjusted.