An on-chip coherent light detection architecture and detection method thereof

Abstract

The embodiment of the present invention provides an on-chip coherent light detection architecture and a detection method thereof, which relates to the field of computer systems and microwave processing technology, and includes a multi-channel optical input circuit, a beam combiner and a photodetector arranged on a substrate, wherein the multi-channel optical input circuit is used to input coherent optical signals, and optical signals of different optical input circuits have different timings; the beam combiner input end is connected to the output end of the multi-channel optical input circuit, and is used to collect and input the multi-channel coherent optical signals into the photodetector; the photodetector input end is connected to the output end of the beam combiner, and is used to add the collected multi-channel coherent optical signals based on the timing, and output operation matrix data. Through the embodiment of the present invention, multi-channel coherent light detection can be performed and directly added in the optical domain, so as to realize parallel calculation of photon operations and reduce the power consumption of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of computer systems and microwave processing, and in particular to an on-chip coherent light detection architecture and a detection method thereof. Background Art

[0002] In the field of optical communications, the use of coherent optical transmission and detection is mainly to improve detection sensitivity and increase relay distance. The current coherent optical transmission and detection method is to set a photodetector in each optical channel to avoid the interference of optical signals from different channels on the detection results. Or the photon signal is serialized and then transmitted to the photodetector to obtain the optical power value at different times, and then the convolution result of the convolutional neural network is realized by adding in the electrical domain. The current detection method will cause the chip layout to increase and the loss to increase. Summary of the invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide an on-chip coherent light detection architecture, a detection method of the on-chip coherent light detection architecture, and a server that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, an embodiment of the present invention discloses an on-chip coherent light detection architecture, including: a multi-channel light input circuit, a beam combiner and a photodetector arranged on a substrate,

[0005] The multi-path optical input circuit is used to input coherent optical signals, and the optical signals of different optical input circuits have different timings;

[0006] The input end of the beam combiner is connected to the output end of the multi-channel optical input circuit, and is used to collect and input the multi-channel coherent optical signals into the photodetector;

[0007] The photoelectric detector input end is connected to the beam combiner output end, and is used to add the collected multi-channel coherent optical signals based on the timing sequence and output the operation matrix data.

[0008] Optionally, each of the multiple optical input circuits includes:

[0009] A straight waveguide transmission line, used for inputting the coherent optical signal;

[0010] An optically adjustable delay line, connected to the straight waveguide transmission line, for adjusting the timing of the coherent optical signal;

[0011] A mode converter is connected to the optical adjustable delay line and is used to perform mode conversion on the timing-adjusted coherent optical signal so as to input the signal into the beam combiner.

[0012] Optionally, the mode converter comprises:

[0013] The intrinsic mode converter is used to convert the fundamental mode of the coherent optical signal after the timing is adjusted into a high-order mode.

[0014] Optionally, the mode converter comprises:

[0015] The electromagnetic converter is used to convert the timing-adjusted coherent optical signal from the transverse electric mode to the transverse magnetic mode.

[0016] Optionally, the optically adjustable time delay line is arranged in a continuous ring pattern, and the number of the rings is positively correlated with the delay of the timing.

[0017] Optionally, the diameter of the ring is greater than 50 microns.

[0018] Optionally, the optically adjustable time delay line is arranged in a spiral pattern, and the number of turns of the spiral is positively correlated with the delay of the timing.

[0019] Optionally, the delay of the optically adjustable delay line is 1-100 picoseconds.

[0020] Optionally, the timing difference between the coherent optical signals input by each optical input circuit is 10-200 picoseconds.

[0021] Optionally, the frequency of the coherent optical signal input by each optical input circuit is 5-100 baud rate.

[0022] Optionally, the spacings between the optically adjustable delay lines of different optical input circuits are distributed.

[0023] Optionally, the spacing between the optically adjustable delay lines of different optical input circuits is 50-100 microns.

[0024] Optionally, the spacing between the straight waveguide transmission line of one optical input circuit of different optical input circuits and the optical adjustable delay line of an adjacent optical input circuit is distributed.

[0025] Optionally, a spacing between a straight waveguide transmission line of one optical input circuit among different optical input circuits and an optically adjustable delay line of an adjacent optical input circuit is greater than 5 microns.

[0026] A detection method based on an on-chip coherent light detection architecture, wherein the on-chip coherent light detection architecture is the above-mentioned on-chip coherent light detection architecture, and the method comprises:

[0027] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data and the preset matrix are processed to generate a coherent optical signal;

[0028] The coherent optical signals are added to obtain operation matrix data.

[0029] Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the step of processing the original input data and a preset matrix to generate a coherent optical signal includes:

[0030] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data is multiplied by a preset matrix to generate a coherent optical signal.

[0031] Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:

[0032] Arranging the coherent optical signals;

[0033] The coherent optical signals are added based on the arranged order to obtain operation matrix data.

[0034] Optionally, the step of arranging the coherent optical signals comprises:

[0035] Determine the processing event;

[0036] The coherent optical signals are arranged based on an order of the processing events.

[0037] Optionally, the step of adding the coherent optical signals based on the arranged order to obtain operation matrix data includes:

[0038] Determining a target position element in a matrix corresponding to the coherent optical signal;

[0039] The target position elements are added based on the arranged order to obtain operation matrix data.

[0040] A server comprises the on-chip coherent light detection architecture as described above.

[0041] The embodiments of the present invention include the following advantages:

[0042] The embodiment of the present invention forms an on-chip coherent light detection architecture by means of a multi-channel optical input circuit, a beam combiner and a photodetector arranged on a substrate; the multi-channel optical input circuit is used to input coherent light signals, and the light signals of different optical input circuits have different timings; the beam combiner input end is connected to the output end of the multi-channel optical input circuit, and is used to collect the multi-channel coherent light signals and input them into the photodetector; the photodetector input end is connected to the output end of the beam combiner, and is used to add the collected multi-channel coherent light signals based on the timing, and output the operation matrix data. Coherent light signals are generated in parallel by the multi-channel optical input circuit, and coherent light signals of different timings are output to the optical input circuits of different channels, and are added based on the timing, and the operation matrix data is output to realize the simultaneous detection and addition of multi-channel coherent light, and the addition is performed in the optical domain, and the data does not need to be serialized. One photodetector can be used to detect and add the signals of the multi-channel optical input circuits, and the parallel calculation of photon operations is realized; the reduction of the photodetector reduces the device layout loss of the chip, thereby reducing the power consumption of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic structural diagram of an on-chip coherent light detection architecture embodiment of the present invention;

[0044] Figure 2 is a schematic structural diagram of another on-chip coherent light detection architecture embodiment of the present invention;

[0045] Figure 3 is a schematic structural diagram of another embodiment of an on-chip coherent light detection architecture of the present invention;

[0046] Figure 4 is a flowchart of a detection method embodiment based on an on-chip coherent light detection architecture of the present invention;

[0047] Figure 5 It is a structural block diagram of a server embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] One of the core concepts of the embodiment of the present invention is to use the orthogonal characteristics between different eigenmodes to complete multi-channel coherent light domain addition and single-channel detection. When the coherent light signal is input into each optical input circuit, it means that the light signal after the multiplication operation of the original data and the convolution kernel matrix (or other matrix) has been completed. At this time, the light signal carries the input data (including but not limited to the image to be recognized, voice data, etc.). Now it is necessary to rearrange the light signals of multiple channels in order and then add them to finally obtain the matrix calculation result.

[0050] Reference Figure 1 , shows a schematic diagram of the structure of an on-chip coherent light detection architecture embodiment of the present invention; the on-chip coherent light detection architecture may specifically include: a multi-channel light input circuit 100, a beam combiner 200 and a photodetector 300 arranged on a substrate,

[0051] The multi-path optical input circuit 100 is used to input coherent optical signals, and the optical signals of different paths of optical input circuits 100 have different timings;

[0052] The input end of the beam combiner 200 is connected to the output end of the multi-channel optical input circuit 100, and is used to collect and input the multi-channel coherent optical signals into the photodetector 300;

[0053] The input end of the photodetector 300 is connected to the output end of the beam combiner 200, and is used to add the collected multi-channel coherent optical signals based on the time sequence and output the operation matrix data.

[0054] In the implementation of the present invention, the multi-channel optical input circuit 100, the beam combiner 200 and the photodetector 300 form an on-chip coherent optical detection architecture. The multi-channel optical input circuit 100, the beam combiner 200 and the photodetector 300 are all arranged on a substrate. The substrate can be an insulating silicon substrate. The insulating silicon substrate has an ultra-thin insulating layer (such as SiO2) on a silicon wafer, and a thin silicon layer on the insulating layer. This structure separates the active silicon layer from the silicon layer of the substrate to form a unique sandwich structure. Among them, the insulating layer is usually made of SiO2 or other insulating materials, which plays an isolation role and reduces parasitic effects. The top silicon layer is used to manufacture the functional layer of the chip, and its quality directly affects the performance of the device. The bottom silicon substrate provides mechanical support and heat dissipation functions. The multi-channel optical input circuit 100, the beam combiner 200 and the photodetector 300 can be arranged on the top silicon layer.

[0055] The multi-channel optical input circuit 100 can be used to input a coherent optical signal, thereby providing an initial optical signal for an on-chip coherent optical detection architecture. The optical polarization state of the coherent optical signal can be a transverse electric state or a transverse magnetic state, which is not specifically limited in the embodiment of the present invention. In an optional embodiment of the present invention, a coherent optical signal in a transverse electric state can be selected. The transverse electric state is a transverse electric field (TE) state, which refers to a wave in which there is no electric field component in the propagation direction of the electromagnetic wave, but there is a magnetic field component; the electric field is mainly located in the waveguide plane. Specifically, the electric field vector of the TE wave is completely located on a cross section perpendicular to the propagation direction, while the magnetic field vector may include a component parallel to the propagation direction. The transverse magnetic state is a transverse magnetic field (TM) state, which refers to a wave in which there is no magnetic field component in the propagation direction of the electromagnetic wave, but there is an electric field component. In contrast to the TE wave, the magnetic field vector of the TM wave is completely located on a cross section perpendicular to the propagation direction, that is, the magnetic field is mainly located in the waveguide plane; while the electric field vector may include a component parallel to the propagation direction. Each mode has unique characteristics that affect the waveguide design, such as polarization sensitivity and modal dispersion. The optical signals of different optical input circuits 100 have different timing sequences.

[0056] The input end of the beam combiner 200 is connected to the output end of the multi-channel optical input circuit 100, that is, the coherent optical signal of each optical input circuit 100 is transmitted to the beam combiner 200, and the multi-channel coherent optical signals are collected by the beam combiner 200 and input into the photodetector 300 so that the photodetector 300 can detect. The working principle of the beam combiner 200 is mainly based on the transmission and coupling effect of light in the waveguide. When the light beam enters the optical waveguide, due to the constraint of the waveguide, the light wave is confined to the inside of the waveguide for transmission. By designing a suitable waveguide structure and coupling method, the merging or distribution of the light beam can be achieved. Specifically, the beam combiner 200 usually adopts a multi-layer thin film structure, and each layer of the film has a different refractive index and thickness. When the light beam is transmitted in the waveguide, reflection and refraction will occur at the film interface, thereby changing the propagation direction of the light beam. By adjusting the refractive index and thickness of the film, the coupling efficiency and transmission characteristics of the light beam can be controlled to achieve the merging or distribution of the light beam. The beam combiner 200 can realize efficient merging of light beams and reduce the loss and waste of light energy; the beam combiner 200 can adopt a solid-state structure, has high stability and reliability, and is suitable for various harsh environments. The beam combiner 200 can be designed and customized according to actual needs to meet the needs of different application scenarios. The beam combiner 200 can be integrated with other optoelectronic components to form an optoelectronic system with more complete functions.

[0057] The photodetector 300 is a device that can convert optical signals into electrical signals. It realizes the conversion of optical signals into electrical signals by utilizing the photoelectric effect (including the external photoelectric effect and the internal photoelectric effect). The photodetector 300 is connected to the beam combiner 200, and adds the combined multi-channel coherent optical signals based on the timing, calculates each coherent optical signal, and obtains the operation matrix data; thus, the addition of coherent optical signals realized by a single photodetector 300 in the optical domain is realized. The working principle of the photodetector 300 is mainly based on the photoelectric effect. Specifically, when light is irradiated onto the sensitive material of the photodetector 300, the electrons inside the material absorb the energy of the photons and undergo corresponding physical changes, thereby generating electrical signals. The size of this electrical signal is related to the parameters such as the light intensity and wavelength of the incident light. External photoelectric effect: that is, the photoelectric emission effect, refers to the phenomenon that when light shines on the surface of a material, the electrons inside the material obtain enough energy to escape from the surface of the material to form photoelectrons. Internal photoelectric effect: includes photoconductivity effect and photovoltaic effect. The photoconductivity effect refers to the fact that when light shines on a semiconductor material, the electrons inside the material absorb the energy of the photon and then transition from the valence band to the conduction band, thereby increasing the conductivity of the material. The photovoltaic effect refers to the fact that when light shines on the PN junction of a semiconductor material, the charge distribution on both sides of the PN junction changes due to the action of the photon, thereby generating an electromotive force. The performance parameters of the photodetector 300 can be designed according to actual needs, and the embodiment of the present invention does not specifically limit this. The performance parameters of the photodetector 300 include but are not limited to quantum efficiency, which is the average number of electrons emitted by the photodetector per incident photon, reflecting the efficiency of the photodetector 300 in utilizing photons. Response, which is the ratio of the output signal of the photodetector 300 to the input light power, reflects the photoelectric conversion efficiency of the photodetector 300. Spectral responsivity, which is the responsivity of the photodetector 300 at a specific wavelength, reflects the sensitivity of the photodetector 300 to light of different wavelengths. Response time, which is the time required for the photodetector 300 to generate a stable electrical signal from receiving an optical signal, reflects the response speed of the photodetector 300. Dark current, the current through the photodetector 300 when there is no light signal or background radiation, reflects the noise level of the photodetector 300.

[0058] Specifically, each optical input circuit 100 in the multi-channel optical input circuit 100 includes:

[0059] A straight waveguide transmission line 110, used for inputting the coherent optical signal;

[0060] An optical adjustable delay line 120, connected to the straight waveguide transmission line 110, for adjusting the timing of the coherent optical signal;

[0061] The mode converter 130 is connected to the optical adjustable delay line 120 and is used to perform mode conversion on the timing-adjusted coherent optical signal so as to input the signal into the beam combiner 200 .

[0062] In an embodiment of the present invention, each optical input circuit 100 includes a straight waveguide transmission line 110, an optically adjustable delay line 120 and a mode converter 130. Among them, the straight waveguide transmission line 110 is used to transmit the input coherent optical signal. The straight waveguide transmission line 110 is a waveguide with a simple structure, which is characterized by direct connection without changing the transmission direction of the signal. Its length can be customized according to the actual application scenario. The main function of the straight waveguide is to serve as a transmission line for optical signals and efficiently transmit optical signals from one end to the other. The straight waveguide is usually made of metal (such as copper, aluminum) or special materials, and its inner wall may be treated with conductive oxidation, gold plating, silver plating, etc. to improve conductivity and corrosion resistance. The cross-sectional shape of the straight waveguide is diverse, including rectangular, circular, square, etc. According to different shapes and uses, the straight waveguide can be divided into various types, such as rectangular waveguide, circular waveguide, single-ridge waveguide, double-ridge waveguide, etc. The working principle of the straight waveguide is based on the transmission characteristics of electromagnetic waves in metal waveguides. When an electromagnetic wave propagates in a waveguide, it reflects back and forth between the walls of the waveguide and proceeds along the axial direction of the waveguide.

[0063] The optical adjustable delay line 120 is connected to the straight waveguide transmission line 110 to adjust the timing of the input coherent optical signal, so that the timing of the coherent optical signals between different optical input circuits 100 is different. The optical adjustable delay line 120 (Optical Tunable Delay Line, OTDL) is an optical device for introducing adjustable time delay to the light beam. The working principle of the optical adjustable delay line 120 generally involves the propagation and reflection of the optical signal in a specific optical structure. By changing certain parameters in the optical structure (such as refractive index, path length, etc.), the propagation time of the optical signal can be adjusted. Specifically, the optical signal enters the delay line from the input end, undergoes a series of optical processing (such as reflection, refraction, interference, etc.), and finally obtains the required time delay at the output end. The optical adjustable delay line 120 can be a waveguide type delay line, so that it can be integrated on an optical waveguide or a photonic chip to adjust the time delay. Waveguide type delay lines usually have a small size and a high degree of integration, and are suitable for application scenarios that require high integration.

[0064] The mode converter 130 is connected to the optical adjustable delay line 120 to perform mode conversion on the timing-adjusted coherent optical signal, thereby increasing the transmission energy of the coherent optical signal and ensuring that the coherent optical signal can be transmitted to the optoelectronic combiner 200, and then the photodetector 300 can acquire the coherent optical signal.

[0065] In an optional embodiment of the present invention, the mode converter 130 includes: an eigenmode converter 131, which is used to convert the fundamental mode of the coherent optical signal after the timing adjustment into a high-order mode.

[0066] In the embodiment of the present invention, the mode converter 130 may be an eigenmode converter 131, which converts the fundamental mode of the timing-adjusted coherent optical signal into a high-order mode to adjust the transmission form of the coherent optical signal.

[0067] In an optional embodiment of the present invention, the mode converter 130 includes: The mode converter 130 includes:

[0068] The electromagnetic converter 132 is used to convert the timing-adjusted coherent optical signal from the transverse electric mode to the transverse magnetic mode.

[0069] In the embodiment of the present invention, the mode converter 130 may be an electromagnetic converter 132, namely a TE-TM converter, which is used to convert the TE (transverse electric) mode of the signal into the TM (transverse magnetic) mode, that is, to convert the timing-adjusted coherent optical signal from the transverse electric mode to the transverse magnetic mode.

[0070] For example, see Figure 2 When the convolution kernel order is 2, the conversion of polarization states between TE and TM orthogonal to each other is relatively simple, so a TE-TM converter can be used.

[0071] In an optional embodiment of the present invention, the optically adjustable time delay line 120 is arranged in a continuous ring pattern, and the number of the rings is positively correlated with the delay of the timing.

[0072] In the embodiment of the present invention, the optically adjustable delay line 120 is arranged in a continuous ring pattern, and different optically adjustable delay lines 120 are arranged with different numbers of rings in the continuous ring pattern, thereby setting different delays. The number of rings is positively correlated with the delay of the timing, such as Figure 1 As shown in , the more rings there are, the greater the timing delay.

[0073] Further, the diameter of the ring is greater than 50 microns. The delay of the optical adjustable delay line 120 is 1-100 picoseconds. The timing difference between the coherent optical signals input by each optical input circuit 100 is 10-200 picoseconds. The frequency of the coherent optical signal input by each optical input circuit 100 is 5-100 baud rate.

[0074] Furthermore, the spacing between the optically adjustable delay lines 120 of different optical input circuits 100 is distributed. The optically adjustable delay lines 120 between each optical input circuit 100 are distributed at a certain distance to avoid signal interference. Specifically, the spacing between the optically adjustable delay lines 120 of different optical input circuits 100 is 50-100 microns. Figure 1 The length of d2 in is 50-100 μm.

[0075] Furthermore, the spacing between the straight waveguide transmission line 110 of one optical input circuit 100 and the optical tunable delay line 120 of an adjacent optical input circuit 100 of different optical input circuits 100 is distributed.

[0076] For any optical input circuit 100, the straight waveguide transmission line 110 and the optical adjustable delay line 120 of the adjacent optical input circuit 100 should be distributed at a certain distance to avoid signal interference. Specifically, the distance between the straight waveguide transmission line 110 of one optical input circuit 100 and the optical adjustable delay line 120 of the adjacent optical input circuit 100 is greater than 5 microns. Figure 1 The length of d1 in is greater than 5 μm.

[0077] In an optional embodiment of the present invention, the optically adjustable time delay line 120 is arranged in a spiral pattern, and the number of turns of the spiral is positively correlated with the delay of the timing.

[0078] To avoid the optically adjustable delay line being too large, the optically adjustable delay line can be arranged in a spiral pattern. Figure 3 The number of spiral turns is positively correlated with the delay of the timing, that is, the more spiral turns, the greater the delay, and vice versa, the fewer spiral turns, the smaller the delay.

[0079] The embodiment of the present invention forms an on-chip coherent light detection architecture by means of a multi-channel optical input circuit, a beam combiner and a photodetector arranged on a substrate; the multi-channel optical input circuit is used to input coherent light signals, and the light signals of different optical input circuits have different timings; the beam combiner input end is connected to the output end of the multi-channel optical input circuit, and is used to collect the multi-channel coherent light signals and input them into the photodetector; the photodetector input end is connected to the output end of the beam combiner, and is used to add the collected multi-channel coherent light signals based on the timing, and output the operation matrix data. Coherent light signals are generated in parallel by the multi-channel optical input circuit, and coherent light signals of different timings are output to the optical input circuits of different channels, and are added based on the timing, and the operation matrix data is output to realize the simultaneous detection and addition of multi-channel coherent light, and the addition is performed in the optical domain, and the data does not need to be serialized. One photodetector can be used to detect and add the signals of the multi-channel optical input circuits, and the parallel calculation of photon operations is realized; the reduction of the photodetector reduces the device layout loss of the chip, thereby reducing the power consumption of the device.

[0080] Reference Figure 4 , shows a flow chart of the steps of an embodiment of a detection method based on an on-chip coherent light detection architecture of the present invention, wherein the on-chip coherent light detection architecture is the on-chip coherent light detection architecture described above. The detection method based on the on-chip coherent light detection architecture may specifically include the following steps:

[0081] Step 401, when each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data and a preset matrix are processed to generate a coherent optical signal;

[0082] When performing data calculations such as neural networks, the original input data is input to each optical input circuit in the multi-channel optical input circuit; each optical input circuit in the multi-channel optical input circuit matches its corresponding timing at the current moment, that is, when the corresponding timing is reached, the original input data can be processed with the preset matrix to generate a coherent optical signal to input the coherent optical signal to the on-chip coherent optical detection architecture.

[0083] The preset matrix is ​​related to the type of data calculation, and the embodiment of the present invention does not limit it. For example, when performing convolutional neural network calculation, the preset matrix is ​​based on the convolution matrix in the convolutional neural network.

[0084] Specifically, the step of processing the original input data and the preset matrix to generate a coherent optical signal when each optical input circuit in the multiple optical input circuits reaches the corresponding timing includes: when each optical input circuit in the multiple optical input circuits reaches the corresponding timing, multiplying the original input data with the preset matrix to generate a coherent optical signal.

[0085] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, a multiplication operation is performed based on the original input data input by the optical input circuit and a preset matrix to generate a coherent optical signal.

[0086] Step 402: Add the coherent optical signals to obtain operation matrix data.

[0087] After the coherent optical signals are obtained, the coherent optical signals can be added to obtain operation matrix data.

[0088] In an optional embodiment of the present invention, the step of adding the coherent optical signals to obtain operation matrix data includes:

[0089] Step S4021, arranging the coherent optical signals;

[0090] First, the coherent optical signals output by each optical input circuit may be arranged in a specific order so that the parallel data can be fused.

[0091] Specifically, the step of arranging the coherent optical signals includes: determining processing events; and arranging the coherent optical signals based on the order of the processing events.

[0092] First, the current processing event can be determined based on the calculation content or the input instruction type. Based on the data processing requirements of the processing event, there will be a data processing order; the coherent optical signals can be arranged based on the order of the processing events.

[0093] Step S4022, adding the coherent optical signals based on the arranged order to obtain operation matrix data.

[0094] The coherent optical signals of each optical input circuit are added in the arranged order until the coherent optical signals of all optical input circuits are added to obtain operation matrix data.

[0095] Specifically, the step of adding the coherent optical signals based on the arranged order to obtain the operation matrix data includes: determining the target position elements in the matrix corresponding to the coherent optical signals; and adding the target position elements based on the arranged order to obtain the operation matrix data.

[0096] Since in the processing process, only the required part of the data needs to be processed, rather than the addition of all the data in the entire matrix, in order to reduce data processing, the target position element in the matrix corresponding to the coherent optical signal can be determined, and the target position element is the part of the data to be processed. Then, based on the order of arrangement, the target position elements are added to obtain the operation matrix data. The data that has not been calculated can be discarded to further reduce the amount of data processing.

[0097] Specifically, the on-chip coherent light detection architecture includes: a multi-channel light input circuit, a beam combiner and a photodetector arranged on a substrate.

[0098] The multi-path optical input circuit is used to input coherent optical signals, and the optical signals of different optical input circuits have different timings;

[0099] The input end of the beam combiner is connected to the output end of the multi-channel optical input circuit, and is used to collect and input the multi-channel coherent optical signals into the photodetector;

[0100] The photoelectric detector input end is connected to the beam combiner output end, and is used to add the collected multi-channel coherent optical signals based on the timing sequence and output the operation matrix data.

[0101] Optionally, each of the multiple optical input circuits includes:

[0102] A straight waveguide transmission line, used for inputting the coherent optical signal;

[0103] An optically adjustable delay line, connected to the straight waveguide transmission line, for adjusting the timing of the coherent optical signal;

[0104] A mode converter is connected to the optical adjustable delay line and is used to perform mode conversion on the timing-adjusted coherent optical signal so as to input the signal into the beam combiner.

[0105] Optionally, the mode converter comprises:

[0106] The intrinsic mode converter is used to convert the fundamental mode of the coherent optical signal after the timing is adjusted into a high-order mode.

[0107] Optionally, the mode converter comprises:

[0108] The electromagnetic converter is used to convert the timing-adjusted coherent optical signal from the transverse electric mode to the transverse magnetic mode.

[0109] Optionally, the optically adjustable time delay line is arranged in a continuous ring pattern, and the number of the rings is positively correlated with the delay of the timing.

[0110] Optionally, the diameter of the ring is greater than 50 microns.

[0111] Optionally, the optically adjustable time delay line is arranged in a spiral pattern, and the number of turns of the spiral is positively correlated with the delay of the timing.

[0112] Optionally, the delay of the optically adjustable delay line is 1-100 picoseconds.

[0113] Optionally, the timing difference between the coherent optical signals input by each optical input circuit is 10-200 picoseconds.

[0114] Optionally, the frequency of the coherent optical signal input by each optical input circuit is 5-100 baud rate.

[0115] Optionally, the spacings between the optically adjustable delay lines of different optical input circuits are distributed.

[0116] Optionally, the spacing between the optically adjustable delay lines of different optical input circuits is 50-100 microns.

[0117] Optionally, the spacing between the straight waveguide transmission line of one optical input circuit of different optical input circuits and the optical adjustable delay line of an adjacent optical input circuit is distributed.

[0118] Optionally, a spacing between a straight waveguide transmission line of one optical input circuit among different optical input circuits and an optically adjustable delay line of an adjacent optical input circuit is greater than 5 microns.

[0119] A detection method based on an on-chip coherent light detection architecture, wherein the on-chip coherent light detection architecture is the above-mentioned on-chip coherent light detection architecture, and the method comprises:

[0120] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data and the preset matrix are processed to generate a coherent optical signal;

[0121] The coherent optical signals are added to obtain operation matrix data.

[0122] Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the step of processing the original input data and a preset matrix to generate a coherent optical signal includes:

[0123] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data is multiplied by a preset matrix to generate a coherent optical signal.

[0124] Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:

[0125] Arranging the coherent optical signals;

[0126] The coherent optical signals are added based on the arranged order to obtain operation matrix data.

[0127] Optionally, the step of arranging the coherent optical signals comprises:

[0128] Determine the processing event;

[0129] The coherent optical signals are arranged based on an order of the processing events.

[0130] Optionally, the step of adding the coherent optical signals based on the arranged order to obtain operation matrix data includes:

[0131] Determining a target position element in a matrix corresponding to the coherent optical signal;

[0132] The target position elements are added based on the arranged order to obtain operation matrix data.

[0133] The embodiment of the present invention forms an on-chip coherent light detection architecture by means of a multi-channel optical input circuit, a beam combiner and a photodetector arranged on a substrate; the multi-channel optical input circuit is used to input coherent light signals, and the light signals of different optical input circuits have different timings; the beam combiner input end is connected to the output end of the multi-channel optical input circuit, and is used to collect the multi-channel coherent light signals and input them into the photodetector; the photodetector input end is connected to the output end of the beam combiner, and is used to add the collected multi-channel coherent light signals based on the timing, and output the operation matrix data. Coherent light signals are generated in parallel by the multi-channel optical input circuit, and coherent light signals of different timings are output to the optical input circuits of different channels, and are added based on the timing, and the operation matrix data is output to realize the simultaneous detection and addition of multi-channel coherent light, and the addition is performed in the optical domain, and the data does not need to be serialized. One photodetector can be used to detect and add the signals of the multi-channel optical input circuits, and the parallel calculation of photon operations is realized; the reduction of the photodetector reduces the device layout loss of the chip, thereby reducing the power consumption of the device.

[0134] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0135] An embodiment of the present invention further discloses a chip, comprising the on-chip coherent light detection architecture as described above.

[0136] The chip can be connected to a microwave processing computing unit to perform coherent light detection through an on-chip coherent light detection architecture to achieve data processing.

[0137] The on-chip coherent light detection architecture includes a multi-path light input circuit, a beam combiner and a photodetector arranged on a substrate.

[0138] The multi-path optical input circuit is used to input coherent optical signals, and the optical signals of different optical input circuits have different timings;

[0139] The input end of the beam combiner is connected to the output end of the multi-channel optical input circuit, and is used to collect and input the multi-channel coherent optical signals into the photodetector;

[0140] The photoelectric detector input end is connected to the beam combiner output end, and is used to add the collected multi-channel coherent optical signals based on the timing sequence and output the operation matrix data.

[0141] Optionally, each of the multiple optical input circuits includes:

[0142] A straight waveguide transmission line, used for inputting the coherent optical signal;

[0143] An optically adjustable delay line, connected to the straight waveguide transmission line, for adjusting the timing of the coherent optical signal;

[0144] A mode converter is connected to the optical adjustable delay line and is used to perform mode conversion on the timing-adjusted coherent optical signal so as to input the signal into the beam combiner.

[0145] Optionally, the mode converter comprises:

[0146] The intrinsic mode converter is used to convert the fundamental mode of the coherent optical signal after the timing is adjusted into a high-order mode.

[0147] Optionally, the mode converter comprises:

[0148] The electromagnetic converter is used to convert the timing-adjusted coherent optical signal from the transverse electric mode to the transverse magnetic mode.

[0149] Optionally, the optically adjustable time delay line is arranged in a continuous ring pattern, and the number of the rings is positively correlated with the delay of the timing.

[0150] Optionally, the diameter of the ring is greater than 50 microns.

[0151] Optionally, the optically adjustable time delay line is arranged in a spiral pattern, and the number of turns of the spiral is positively correlated with the delay of the timing.

[0152] Optionally, the delay of the optically adjustable delay line is 1-100 picoseconds.

[0153] Optionally, the timing difference between the coherent optical signals input by each optical input circuit is 10-200 picoseconds.

[0154] Optionally, the frequency of the coherent optical signal input by each optical input circuit is 5-100 baud rate.

[0155] Optionally, the spacings between the optically adjustable delay lines of different optical input circuits are distributed.

[0156] Optionally, the spacing between the optically adjustable delay lines of different optical input circuits is 50-100 microns.

[0157] Optionally, the spacing between the straight waveguide transmission line of one optical input circuit of different optical input circuits and the optical adjustable delay line of an adjacent optical input circuit is distributed.

[0158] Optionally, a spacing between a straight waveguide transmission line of one optical input circuit among different optical input circuits and an optically adjustable delay line of an adjacent optical input circuit is greater than 5 microns.

[0159] A detection method based on an on-chip coherent light detection architecture, wherein the on-chip coherent light detection architecture is the above-mentioned on-chip coherent light detection architecture, and the method comprises:

[0160] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data and the preset matrix are processed to generate a coherent optical signal;

[0161] The coherent optical signals are added to obtain operation matrix data.

[0162] Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the step of processing the original input data and a preset matrix to generate a coherent optical signal includes:

[0163] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data is multiplied by a preset matrix to generate a coherent optical signal.

[0164] Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:

[0165] Arranging the coherent optical signals;

[0166] The coherent optical signals are added based on the arranged order to obtain operation matrix data.

[0167] Optionally, the step of arranging the coherent optical signals comprises:

[0168] Determine the processing event;

[0169] The coherent optical signals are arranged based on an order of the processing events.

[0170] Optionally, the step of adding the coherent optical signals based on the arranged order to obtain operation matrix data includes:

[0171] Determining a target position element in a matrix corresponding to the coherent optical signal;

[0172] The target position elements are added based on the arranged order to obtain operation matrix data.

[0173] The embodiment of the present invention forms an on-chip coherent light detection architecture by means of a multi-channel optical input circuit, a beam combiner and a photodetector arranged on a substrate; the multi-channel optical input circuit is used to input coherent light signals, and the light signals of different optical input circuits have different timings; the beam combiner input end is connected to the output end of the multi-channel optical input circuit, and is used to collect the multi-channel coherent light signals and input them into the photodetector; the photodetector input end is connected to the output end of the beam combiner, and is used to add the collected multi-channel coherent light signals based on the timing, and output the operation matrix data. Coherent light signals are generated in parallel by the multi-channel optical input circuit, and coherent light signals of different timings are output to the optical input circuits of different channels, and are added based on the timing, and the operation matrix data is output to realize the simultaneous detection and addition of multi-channel coherent light, and the addition is performed in the optical domain, and the data does not need to be serialized. One photodetector can be used to detect and add the signals of the multi-channel optical input circuits, and the parallel calculation of photon operations is realized; the reduction of the photodetector reduces the device layout loss of the chip, thereby reducing the power consumption of the device.

[0174] Reference Figure 5 , shows a structural block diagram of a server embodiment of the present invention, including the on-chip coherent light detection architecture 10 as described above.

[0175] The on-chip coherent light detection architecture 10 can process the transmitted data, thereby realizing the function of data calculation.

[0176] The on-chip coherent light detection architecture includes a multi-path light input circuit, a beam combiner and a photodetector arranged on a substrate.

[0177] The multi-path optical input circuit is used to input coherent optical signals, and the optical signals of different optical input circuits have different timings;

[0178] The input end of the beam combiner is connected to the output end of the multi-channel optical input circuit, and is used to collect and input the multi-channel coherent optical signals into the photodetector;

[0179] The photoelectric detector input end is connected to the beam combiner output end, and is used to add the collected multi-channel coherent optical signals based on the timing sequence and output the operation matrix data.

[0180] Optionally, each of the multiple optical input circuits includes:

[0181] A straight waveguide transmission line, used for inputting the coherent optical signal;

[0182] An optically adjustable delay line, connected to the straight waveguide transmission line, for adjusting the timing of the coherent optical signal;

[0183] A mode converter is connected to the optical adjustable delay line and is used to perform mode conversion on the timing-adjusted coherent optical signal so as to input the signal into the beam combiner.

[0184] Optionally, the mode converter comprises:

[0185] The intrinsic mode converter is used to convert the fundamental mode of the coherent optical signal after the timing is adjusted into a high-order mode.

[0186] Optionally, the mode converter comprises:

[0187] The electromagnetic converter is used to convert the timing-adjusted coherent optical signal from the transverse electric mode to the transverse magnetic mode.

[0188] Optionally, the optically adjustable time delay line is arranged in a continuous ring pattern, and the number of the rings is positively correlated with the delay of the timing.

[0189] Optionally, the diameter of the ring is greater than 50 microns.

[0190] Optionally, the optically adjustable time delay line is arranged in a spiral pattern, and the number of turns of the spiral is positively correlated with the delay of the timing.

[0191] Optionally, the delay of the optically adjustable delay line is 1-100 picoseconds.

[0192] Optionally, the timing difference between the coherent optical signals input by each optical input circuit is 10-200 picoseconds.

[0193] Optionally, the frequency of the coherent optical signal input by each optical input circuit is 5-100 baud rate.

[0194] Optionally, the spacings between the optically adjustable delay lines of different optical input circuits are distributed.

[0195] Optionally, the spacing between the optically adjustable delay lines of different optical input circuits is 50-100 microns.

[0196] Optionally, the spacing between the straight waveguide transmission line of one optical input circuit of different optical input circuits and the optical adjustable delay line of an adjacent optical input circuit is distributed.

[0197] Optionally, a spacing between a straight waveguide transmission line of one optical input circuit among different optical input circuits and an optically adjustable delay line of an adjacent optical input circuit is greater than 5 microns.

[0198] A detection method based on an on-chip coherent light detection architecture, wherein the on-chip coherent light detection architecture is the above-mentioned on-chip coherent light detection architecture, and the method comprises:

[0199] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data and the preset matrix are processed to generate a coherent optical signal;

[0200] The coherent optical signals are added to obtain operation matrix data.

[0201] Optionally, when each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the step of processing the original input data and a preset matrix to generate a coherent optical signal includes:

[0202] When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data is multiplied by a preset matrix to generate a coherent optical signal.

[0203] Optionally, the step of adding the coherent optical signals to obtain operation matrix data includes:

[0204] Arranging the coherent optical signals;

[0205] The coherent optical signals are added based on the arranged order to obtain operation matrix data.

[0206] Optionally, the step of arranging the coherent optical signals comprises:

[0207] Determine the processing event;

[0208] The coherent optical signals are arranged based on an order of the processing events.

[0209] Optionally, the step of adding the coherent optical signals based on the arranged order to obtain operation matrix data includes:

[0210] Determining a target position element in a matrix corresponding to the coherent optical signal;

[0211] The target position elements are added based on the arranged order to obtain operation matrix data.

[0212] The embodiment of the present invention forms an on-chip coherent light detection architecture by means of a multi-channel optical input circuit, a beam combiner and a photodetector arranged on a substrate; the multi-channel optical input circuit is used to input coherent light signals, and the light signals of different optical input circuits have different timings; the beam combiner input end is connected to the output end of the multi-channel optical input circuit, and is used to collect the multi-channel coherent light signals and input them into the photodetector; the photodetector input end is connected to the output end of the beam combiner, and is used to add the collected multi-channel coherent light signals based on the timing, and output the operation matrix data. Coherent light signals are generated in parallel by the multi-channel optical input circuit, and coherent light signals of different timings are output to the optical input circuits of different channels, and are added based on the timing, and the operation matrix data is output to realize the simultaneous detection and addition of multi-channel coherent light, and the addition is performed in the optical domain, and the data does not need to be serialized. One photodetector can be used to detect and add the signals of the multi-channel optical input circuits, and the parallel calculation of photon operations is realized; the reduction of the photodetector reduces the device layout loss of the chip, thereby reducing the power consumption of the device.

[0213] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0214] The above is a detailed introduction to an on-chip coherent light detection architecture, a detection method for an on-chip coherent light detection architecture and a server provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An on-chip coherent light detection architecture, characterized in that: include: A multi-path optical input circuit, a beam combiner and a single photodetector are arranged on a substrate, The multi-path optical input circuit is used to input coherent optical signals, and the optical signals of different paths of optical input circuits have different timings, and the different timings are determined based on the path lengths of the different paths of optical input circuits; The input end of the beam combiner is connected to the output end of the multi-channel optical input circuit, and is used to collect and input the multi-channel coherent optical signals into the photodetector; The photodetector input end is connected to the beam combiner output end, and is used to add the collected multi-channel coherent optical signals based on the time sequence by utilizing the orthogonal characteristics between the eigenmodes, and output the operation matrix data; The step of performing addition based on time sequence and outputting operation matrix data comprises: arranging the coherent optical signals; determining target position elements in a matrix corresponding to the coherent optical signals; and adding the target position elements based on the arranged order to obtain operation matrix data.

2. The on-chip coherent light detection architecture according to claim 1, characterized in that: Each of the multiple optical input circuits comprises: A straight waveguide transmission line, used for inputting the coherent optical signal; An optically adjustable delay line, connected to the straight waveguide transmission line, for adjusting the timing of the coherent optical signal; A mode converter is connected to the optical adjustable delay line and is used to perform mode conversion on the timing-adjusted coherent optical signal so as to input the signal into the beam combiner.

3. The on-chip coherent light detection architecture according to claim 2, characterized in that: The mode converter comprises: The intrinsic mode converter is used to convert the fundamental mode of the coherent optical signal after the timing is adjusted into a high-order mode.

4. The on-chip coherent light detection architecture according to claim 2, characterized in that: The mode converter comprises: The electromagnetic converter is used to convert the timing-adjusted coherent optical signal from the transverse electric mode to the transverse magnetic mode.

5. The on-chip coherent light detection architecture according to claim 2, characterized in that: The optically adjustable time delay line is arranged in a continuous ring pattern, and the number of the rings is positively correlated with the delay of the timing.

6. The on-chip coherent light detection architecture according to claim 5, characterized in that: The diameter of the ring is greater than 50 microns.

7. The on-chip coherent light detection architecture according to claim 2, characterized in that: The optically adjustable time delay line is arranged in a spiral pattern, and the number of turns of the spiral is positively correlated with the delay of the timing.

8. The on-chip coherent light detection architecture according to claim 2, characterized in that: The time delay of the optically adjustable time delay line is 1-100 picoseconds.

9. The on-chip coherent light detection architecture according to claim 2, characterized in that: The timing difference between the coherent optical signals input by each optical input circuit is 10-200 picoseconds.

10. The on-chip coherent light detection architecture according to claim 2, characterized in that: The frequency of the coherent optical signal input by each optical input circuit is 5-100 baud rate.

11. The on-chip coherent light detection architecture according to claim 2, characterized in that: The optically adjustable delay lines of different optical input circuits are distributed at intervals.

12. The on-chip coherent light detection architecture according to claim 11, characterized in that: The spacing between the optically adjustable delay lines of different optical input circuits is 50-100 microns.

13. The on-chip coherent light detection architecture according to claim 2, characterized in that: The straight waveguide transmission line of one optical input circuit among different optical input circuits is spaced apart from the optical adjustable delay line of the adjacent optical input circuit.

14. The on-chip coherent light detection architecture according to claim 13, characterized in that: The spacing between the straight waveguide transmission line of one optical input circuit among different optical input circuits and the optical adjustable delay line of an adjacent optical input circuit is greater than 5 microns.

15. A detection method based on an on-chip coherent light detection architecture, characterized in that: The on-chip coherent light detection architecture is the on-chip coherent light detection architecture according to any one of claims 1 to 14, and the method comprises: When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data and the preset matrix are processed to generate a coherent optical signal; Adding the coherent optical signals to obtain operation matrix data; The step of adding the coherent optical signals to obtain the operation matrix data comprises: arranging the coherent optical signals; adding the coherent optical signals based on the arranged order to obtain the operation matrix data; The step of adding the coherent optical signals based on the arranged order to obtain operation matrix data comprises: Determining a target position element in a matrix corresponding to the coherent optical signal; The target position elements are added based on the arranged order to obtain operation matrix data.

16. The method according to claim 15, characterized in that The step of processing the original input data and the preset matrix to generate a coherent optical signal when each optical input circuit in the multiple optical input circuits reaches a corresponding timing comprises: When each optical input circuit in the multiple optical input circuits reaches a corresponding timing, the original input data is multiplied by a preset matrix to generate a coherent optical signal.

17. The method according to claim 15, characterized in that The step of arranging the coherent optical signals comprises: Determine the processing event; The coherent optical signals are arranged based on an order of the processing events.

18. A server, characterized in that: Comprising an on-chip coherent light detection architecture as described in any one of claims 1-14.

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