CN116756475A - Jitter control method and system for micro-ring resonator weight matrix - Google Patents
Jitter control method and system for micro-ring resonator weight matrix Download PDFInfo
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Abstract
The invention discloses a jitter control method and a jitter control system of a micro-ring resonator weight matrix, which relate to the technical field of optical tuning, wherein the method comprises the following steps: generating a set dithering signal based on the frequency of the input signal, and mixing the set dithering signal with the input signal to obtain a mixed signal; acquiring a mixed signal passing through the micro-ring resonator based on a balance photoelectric detector to obtain an output signal; acquiring a mixed signal passing through the micro-ring resonator based on a duplexer to obtain a mixed waveform; digital separation is carried out on the mixed waveform, and an output waveform corresponding to the set jitter signal is obtained; comparing the output waveform with a set jitter signal to obtain a weight matrix of the micro-ring resonator; comparing the output signal with an actual demand signal to obtain an adjustment parameter; and adjusting the weight matrix based on the adjustment parameters. The method has high calculation efficiency and improves the tuning precision of the micro-ring resonator weight matrix.
Description
Technical Field
The invention relates to the technical field of optical tuning, in particular to a jitter control method and a jitter control system for a micro-ring resonator weight matrix.
Background
A micro-ring resonator weight pool (MRR weight bank, MRR-WB) is becoming an important component of silicon photonics, which is used in high performance computers to perform vector matrix multiplication and solve constant difference equations. MRR-WB dominates over the wind in its compactness, ease of tuning, low power consumption, high efficiency and inherent wavelength division multiplexing compatibility. However, MRR-WB provides little relative accuracy (-8 bits) for weight control compared to conventional analog computers. Thus, in almost all cases, the performance of MRR-WB is limited, such as the prediction accuracy of the neural network, the available data resolution of the vector matrix multiplier. Accurate weighting is therefore critical to ensure adequate sensitivity of signal analysis and separation.
Disclosure of Invention
The invention aims to provide a jitter control method and a jitter control system for a micro-ring resonator weight matrix, which improve the calculation efficiency and the tuning precision of the micro-ring resonator weight matrix.
In order to achieve the above object, the present invention provides the following solutions:
a jitter control method of a micro-ring resonator weight matrix comprises the following steps:
generating a set dithering signal based on the frequency of an input signal, and mixing the set dithering signal with the input signal to obtain a mixed signal;
acquiring the mixed signal passing through the micro-ring resonator based on a balance photoelectric detector to obtain an output signal;
acquiring the mixed signal passing through the micro-ring resonator based on a duplexer to obtain a mixed waveform;
performing digital separation on the mixed waveform to obtain an output waveform corresponding to the set jitter signal;
comparing the output waveform with the set jitter signal to obtain a weight matrix of the micro-ring resonator;
comparing the output signal with an actual demand signal to obtain an adjustment parameter; and adjusting the weight matrix based on the adjustment parameters.
Preferably, the input signal and the set dither signal are generated based on a tunable optical attenuator.
Preferably, the mixing of the set jitter signal and the input signal to obtain a mixed signal is realized based on an arrayed waveguide grating.
Preferably, the set jitter signal is a sine wave signal, and the frequency of the set jitter signal is smaller than the frequency of the input signal.
The invention also provides a jitter control system of the micro-ring resonator weight matrix, which comprises:
the signal generation module is used for generating a set dithering signal based on the frequency of an input signal and mixing the set dithering signal with the input signal to obtain a mixed signal;
the first acquisition module is used for acquiring the mixed signal passing through the micro-ring resonator based on the balance photoelectric detector to obtain an output signal;
the second acquisition module is used for acquiring the mixed signal passing through the micro-ring resonator based on a duplexer to obtain a mixed waveform;
the signal separation module is used for carrying out digital separation on the mixed waveform to obtain an output waveform corresponding to the set jitter signal;
the matrix generation module is used for comparing the output waveform with the set jitter signal to obtain a weight matrix of the micro-ring resonator;
the matrix adjustment module is used for comparing the output signal with an actual demand signal to obtain adjustment parameters; and adjusting the weight matrix based on the adjustment parameters.
Preferably, the signal generating module includes:
a tunable optical attenuator for generating the input signal and the set jitter signal;
and the array waveguide grating is used for mixing the set jitter signal with the input signal to obtain a mixed signal.
Preferably, the set jitter signal is a sine wave signal, and the frequency of the set jitter signal is smaller than the frequency of the input signal.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a jitter control method and a jitter control system of a micro-ring resonator weight matrix, wherein the method comprises the following steps: generating a set dithering signal based on the frequency of the input signal, and mixing the set dithering signal with the input signal to obtain a mixed signal; acquiring a mixed signal passing through the micro-ring resonator based on a balance photoelectric detector to obtain an output signal; acquiring a mixed signal passing through the micro-ring resonator based on a duplexer to obtain a mixed waveform; digital separation is carried out on the mixed waveform, and an output waveform corresponding to the set jitter signal is obtained; comparing the output waveform with a set jitter signal to obtain a weight matrix of the micro-ring resonator; comparing the output signal with an actual demand signal to obtain an adjustment parameter; and adjusting the weight matrix based on the adjustment parameters. The method has high calculation efficiency and improves the tuning precision of the micro-ring resonator weight matrix.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a jitter control method of a weight matrix of a micro-ring resonator according to the present invention;
FIG. 2 is a schematic diagram of the jitter control principle of the weighting matrix of the micro-ring resonator according to the present invention;
FIG. 3 is a diagram of a jitter control system of a micro-ring resonator weight matrix according to the present invention;
FIG. 4 is a diagram of the weight matrix error in accordance with the present invention;
FIG. 5 is a grid diagram of a weight matrix of a two-channel microring resonator of the present invention.
Symbol description: 1. a signal generation module; 2. a first acquisition module; 3. a second acquisition module; 4. a signal separation module; 5. a matrix generation module; 6. and a matrix adjustment module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a jitter control method and a jitter control system for a micro-ring resonator weight matrix, which improve the calculation efficiency and the tuning precision of the micro-ring resonator weight matrix.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
FIG. 1 is a flow chart of a jitter control method of a weight matrix of a micro-ring resonator according to the present invention; fig. 2 is a schematic diagram of a jitter control principle of a weighting matrix of a micro-ring resonator according to the present invention. As shown in fig. 1 and 2, the present invention provides a jitter control method of a weight matrix of a micro-ring resonator, including:
step S1, a set jitter signal is generated based on the frequency of an input signal, and the set jitter signal and the input signal are mixed to obtain a mixed signal. Wherein the input signal and the set dither signal are generated based on a tunable optical attenuator; and mixing the set dithering signal with the input signal based on the arrayed waveguide grating to obtain a mixed signal. In this embodiment, the set jitter signal is a sine wave signal, and the frequency of the set jitter signal is smaller than the frequency of the input signal. The meaning of each english representation in fig. 2 is a variable optical attenuator (Variable OpticalAttenuator, VOA for short); an arrayed waveguide grating (Arrayed WaveguideGrating, AWG for short); balanced Photodetectors (BPDs); low Frequency (LF); high Frequency (HF).
And step S2, acquiring the mixed signal passing through the micro-ring resonator based on the balance photoelectric detector to obtain an output signal.
And step S3, acquiring the mixed signal passing through the micro-ring resonator based on a duplexer to obtain a mixed waveform. Since the set dither signal shares the same path as the input signal, a true weight matrix can be reflected based on a change in the set dither signal.
And S4, carrying out digital separation on the mixed waveform to obtain an output waveform corresponding to the set jitter signal. Since the frequency of the set dither signal is smaller than the frequency of the input signal, the mixed waveform can be easily separated.
Taking the input signal as an example, the transfer function of the input of the pass end of the micro-ring resonator is as follows:
the transfer function of the output at the drop end of the microring resonator is:
where r is the self-coupling coefficient and a defines the propagation loss of the ring and the directional coupler. Phi is the phase and lambda is the wavelength of the input signal.
And S5, comparing the output waveform with the set jitter signal to obtain a weight matrix of the micro-ring resonator.
S6, comparing the output signal with an actual demand signal to obtain an adjustment parameter; and adjusting the weight matrix based on the adjustment parameters.
To verify the effectiveness of the jitter control method, we evaluate the consistency between the set jitter signal and the actual input signal. For this purpose we use a 120MHz sinusoidal signal as the actual input signal. After calibration, we increased the current applied to the micro-ring resonator MRR heater from 0.5mA to 1.6mA while recording the actual output signal and setting the weight of the dither signal. As a result, as shown in fig. 4, it can be seen from fig. 4 that the weight error does not exceed 0.5% in the whole range, indicating that the weight of the set dither signal has consistency with the weight of the actual input signal.
Next, the performance evaluation is extended to a weight matrix consisting of two channels, and the results are visualized using a grid graph, as shown in fig. 5. Wherein two MRR channels are tuned to (ω) 1 ，ω 2 ) Are equidistant grid points omega 1,2 ∈[-1,1]The test was repeated multiple times for each point. Then, the average error and standard deviation of all test results are calculated, and the overall accuracy and precision of the control performance can be obtained. The test selected grid size was 9 x 9 and the weight search was repeated three times for each grid. Compared with the previous work, the error is obviously reduced, one precision reaches 8.5bits, and the other precision reaches 9.0bits.
FIG. 3 is a block diagram of a jitter control system of a micro-ring resonator weight matrix according to the present invention. As shown in fig. 3, the present invention provides a jitter control system of a micro-ring resonator weight matrix, comprising: the system comprises a signal generation module 1, a first acquisition module 2, a second acquisition module 3, a signal separation module 4, a matrix generation module 5 and a matrix adjustment module 6.
The signal generating module 1 is configured to generate a set jitter signal based on a frequency of an input signal, and mix the set jitter signal with the input signal to obtain a mixed signal.
The first acquisition module 2 is used for acquiring the mixed signal passing through the micro-ring resonator based on the balanced photoelectric detector to obtain an output signal.
The second acquisition module 3 is configured to acquire the mixed signal passing through the micro-ring resonator based on a duplexer, so as to obtain a mixed waveform.
The signal separation module 4 is configured to digitally separate the mixed waveform to obtain an output waveform corresponding to the set jitter signal.
The matrix generation module 5 is configured to compare the output waveform with the set jitter signal to obtain a weight matrix of the micro-ring resonator.
The matrix adjustment module 6 is configured to compare the output signal with an actual demand signal to obtain an adjustment parameter; and adjusting the weight matrix based on the adjustment parameters.
Optionally, the signal generating module 1 includes:
a tunable optical attenuator for generating the input signal and the set jitter signal;
and the array waveguide grating is used for mixing the set jitter signal with the input signal to obtain a mixed signal.
Optionally, the set jitter signal is a sine wave signal, and a frequency of the set jitter signal is smaller than a frequency of the input signal.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. A jitter control method of a micro-ring resonator weight matrix is characterized by comprising the following steps:
generating a set dithering signal based on the frequency of an input signal, and mixing the set dithering signal with the input signal to obtain a mixed signal;
acquiring the mixed signal passing through the micro-ring resonator based on a balance photoelectric detector to obtain an output signal;
acquiring the mixed signal passing through the micro-ring resonator based on a duplexer to obtain a mixed waveform;
performing digital separation on the mixed waveform to obtain an output waveform corresponding to the set jitter signal;
comparing the output waveform with the set jitter signal to obtain a weight matrix of the micro-ring resonator;
comparing the output signal with an actual demand signal to obtain an adjustment parameter; and adjusting the weight matrix based on the adjustment parameters.
2. The method of claim 1, wherein the input signal and the set dither signal are generated based on a tunable optical attenuator.
3. The method for controlling jitter of a micro-ring resonator weight matrix according to claim 1, wherein the mixing of the set jitter signal and the input signal to obtain a mixed signal is implemented based on an arrayed waveguide grating.
4. The method according to claim 1, wherein the set dither signal is a sine wave signal, and the frequency of the set dither signal is smaller than the frequency of the input signal.
5. A jitter control system for a micro-ring resonator weight matrix, comprising:
the signal generation module is used for generating a set dithering signal based on the frequency of an input signal and mixing the set dithering signal with the input signal to obtain a mixed signal;
the first acquisition module is used for acquiring the mixed signal passing through the micro-ring resonator based on the balance photoelectric detector to obtain an output signal;
the second acquisition module is used for acquiring the mixed signal passing through the micro-ring resonator based on a duplexer to obtain a mixed waveform;
the signal separation module is used for carrying out digital separation on the mixed waveform to obtain an output waveform corresponding to the set jitter signal;
the matrix generation module is used for comparing the output waveform with the set jitter signal to obtain a weight matrix of the micro-ring resonator;
the matrix adjustment module is used for comparing the output signal with an actual demand signal to obtain adjustment parameters; and adjusting the weight matrix based on the adjustment parameters.
6. The jitter control system of claim 5 wherein said signal generation module comprises:
a tunable optical attenuator for generating the input signal and the set jitter signal;
and the array waveguide grating is used for mixing the set jitter signal with the input signal to obtain a mixed signal.
7. The system according to claim 5, wherein the set dither signal is a sine wave signal, and the frequency of the set dither signal is smaller than the frequency of the input signal.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150323818A1 (en) * | 2013-01-25 | 2015-11-12 | The Trustees Of Columbia University In The City Of New York | Applications of wavelength-locking using dithering signals for microring resonators |
| US20180209846A1 (en) * | 2017-01-25 | 2018-07-26 | Apple Inc. | SPAD Detector Having Modulated Sensitivity |
| WO2022187929A1 (en) * | 2021-03-10 | 2022-09-15 | Huawei Technologies Canada Co., Ltd. | Method and system for optical computing based on arrays of high-speed time gated single photon detectors |
| CN116258189A (en) * | 2023-03-15 | 2023-06-13 | 西安电子科技大学 | Photon synapse weight matrix device of cross array and weight adjustment method thereof |
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- 2023-06-27 CN CN202310760758.4A patent/CN116756475A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150323818A1 (en) * | 2013-01-25 | 2015-11-12 | The Trustees Of Columbia University In The City Of New York | Applications of wavelength-locking using dithering signals for microring resonators |
| US20180209846A1 (en) * | 2017-01-25 | 2018-07-26 | Apple Inc. | SPAD Detector Having Modulated Sensitivity |
| WO2022187929A1 (en) * | 2021-03-10 | 2022-09-15 | Huawei Technologies Canada Co., Ltd. | Method and system for optical computing based on arrays of high-speed time gated single photon detectors |
| CN116258189A (en) * | 2023-03-15 | 2023-06-13 | 西安电子科技大学 | Photon synapse weight matrix device of cross array and weight adjustment method thereof |
Non-Patent Citations (2)
| Title |
|---|
| WEIPENG ZHANG等: "Microring Weight Banks Control beyond 8.5-bits Accuracy", HTTPS://ARXIV.ORG/PDF/2104.01164V2.PDF, 9 April 2021 (2021-04-09), pages 1 - 4 * |
| 黄蕾: "面向神经拟态计算的光片上网络研究", 中国博士学位论文全文数据库，信息科技辑, no. 4, 15 April 2022 (2022-04-15) * |
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