CN113534659A - Multistage assembly line time division multiplexing feedback control method and system - Google Patents

Multistage assembly line time division multiplexing feedback control method and system Download PDF

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CN113534659A
CN113534659A CN202010314277.7A CN202010314277A CN113534659A CN 113534659 A CN113534659 A CN 113534659A CN 202010314277 A CN202010314277 A CN 202010314277A CN 113534659 A CN113534659 A CN 113534659A
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谭旻
汪志城
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Huazhong University of Science and Technology
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    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
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    • G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
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Abstract

本发明公开了一种多级流水线时分复用反馈控制方法及系统，属于片上集成光子系统的热反馈控制领域，所述方法包括：将控制电路单元分为n个顺序工作的功能电路模块，每个功能电路模块的响应时间分别为m1·TC、m2·TC、……、mn·TC，其中，TC为控制电路单元的响应时间，n为大于2的整数，且m1+m2+……+mn＝1，m1≤m2≤…≤mn。在将整体控制电路进行第一级时分复用来控制多个光子器件的基础上；在控制电路中，将不同的功能电路模块进行第二级时分复用，在不明显增加控制电路面积的前提下，所能够控制的光子器件数量是传统时分复用方法的数倍，从而提高了控制电路的功能电路模块的利用率，并且增加了所能够控制的光子器件数量。

Figure 202010314277

The invention discloses a multi-stage pipeline time division multiplexing feedback control method and system, belonging to the field of thermal feedback control of an on-chip integrated photonic system. The method comprises: dividing a control circuit unit into n functional circuit modules that work sequentially, and each The response times of the functional circuit modules are respectively m 1 ·TC , m 2 · TC , ..., m n · TC , where TC is the response time of the control circuit unit, n is an integer greater than 2, and m 1 +m 2 +... + mn =1, m 1 ≤m 2 ≤... ≤mn . On the basis of the first-level time division multiplexing of the overall control circuit to control multiple photonic devices; in the control circuit, the second-level time-division multiplexing of different functional circuit modules is performed without significantly increasing the control circuit area. The number of photonic devices that can be controlled is several times that of the traditional time division multiplexing method, thereby improving the utilization rate of the functional circuit modules of the control circuit and increasing the number of photonic devices that can be controlled.

Figure 202010314277

Description

Multistage assembly line time division multiplexing feedback control method and system
Technical Field
The invention belongs to the field of thermal feedback control of an on-chip integrated photonic system, and particularly relates to a time division multiplexing feedback control method and a time division multiplexing feedback control system for a multistage assembly line.
Background
With the rapid increase of data throughput and the increasing demand of transmission speed, the power consumption of the conventional electrical connection in the data center is increasing in geometric multiples, and the performance requirement required by data transmission cannot be met. The optical connection has the advantages of low power consumption, high bandwidth density and the like, and has a great potential capable of meeting the requirement of data transmission performance, but the on-chip integrated photonic device faces the challenges of thermal sensitivity, process deviation caused by processing precision and the like, which are difficult to completely solve from the material and process aspects. At present, an electrical closed-loop feedback control method is generally used for controlling the temperature of a single integrated photonic device so as to compensate the environmental temperature fluctuation and the process deviation.
At present, most closed-loop feedback control methods use a control circuit to control a single photonic device, the timing principle of the control is shown in fig. 1, and as the chip area of the control circuit is very large, which is generally dozens of times or even hundreds of times of the area of the single photonic device, and the power consumption of the control circuit is also large, the control circuit is not beneficial to large-scale on-chip photonic integration. Since the response speed of the control circuit is very fast, the response time is usually in the order of microseconds, while the response speed of the thermo-optic modulation of the photonic device is slow, and the response time is usually tens or even hundreds of microseconds. Therefore, the control circuit can be time-division multiplexed, so that one control circuit can be realized to control a plurality of photonic devices. Assuming that the thermo-optic modulation response time of the photonic device is TPTThe response time of the feedback control circuit is TC，TPT＝3TCWherein S, C and O are respectively the working time of the sampling circuit, the working time of the arithmetic processing circuit and the working time of the output stage circuit in the control circuit, which are all 1/3TCFig. 2 and 3 are schematic illustrations of timing of direct time-division multiplexing and pipelined time-division multiplexing feedback control methods, respectively. It can be seen from the timing diagram that the functional circuit blocks in the control circuit of the two methods are still in idle states, and each functional circuit block in the control circuit is not in an active state all the time, which may result in a reduction in energy utilization efficiency. Meanwhile, the two time division multiplexing control methods have the advantage that the number of controllable photonic devices is limited on the premise of not increasing the area of a control circuit.
Disclosure of Invention
Aiming at the defects and improvement requirements of the prior art, the invention provides a multi-stage assembly line time division multiplexing feedback control method and a multi-stage assembly line time division multiplexing feedback control system, and aims to solve the technical problems that the utilization rate of functional circuit modules of a control circuit in the traditional time division multiplexing control method is low, and the number of controllable photonic devices is limited.
To achieve the above object, according to an aspect of the present invention, there is provided a multistage pipeline time division multiplexing feedback control method, including:
dividing the control circuit unit into n functional circuit modules working sequentially, wherein the response time of each functional circuit module is m1·TC、m2·TC、......、mn·TCWherein, TCN is an integer greater than 2, and m is the response time of the control circuit unit1+m2+......+mn＝1，m1≤m2≤…≤mn；
Under the control of the time sequence generating and controlling module, the multiplexer selects the signal of the ith channel and transmits the signal to the 1 st functional circuit module, wherein i is an integer greater than 0;
through m1·TCThe 1 st functional circuit module transmits the signal of the ith channel to the 2 nd functional circuit module; meanwhile, the multiplexer selects signals of an (i +1) th channel to transmit to the 1 st functional circuit module;
through m1·TC+m2·TCThe 2 nd functional circuit module transmits the signal of the ith channel to the 3 rd functional circuit module; meanwhile, the 1 st functional circuit module transmits signals of the (i +1) th channel to the 2 nd functional circuit module; meanwhile, the multiplexer selects signals of an i +2 th channel and transmits the signals to the 1 st functional circuit module;
until T is passedCThe nth functional circuit module transmits the signal of the ith channel to the demultiplexer, the demultiplexer transmits the signal of the ith channel to the ith driver, and the ith driver controls the heat modulator of the ith integrated photonic device, so that the working state of the ith integrated photonic device is changed.
Further, n is 3, and m1＝m2＝m3＝1/3；
The control circuit unit includes: the device comprises a front-end processing circuit, an algorithm processing circuit and an output stage circuit;
under the control of the time sequence generating and controlling module, the multiplexer selects the signal of the ith channel and transmits the signal to the front-end processing circuit, the front-end processing circuit is used for judging the change trend of the signal of the ith channel, wherein i is an integer greater than 0;
pass through 1/3TCThe front-end processing circuit transmits the signal of the ith channel to the algorithm processing circuit, and the algorithm processing circuit is used for determining the change trend of the current output signal of the ith channel according to the slope information of the current input signal of the ith channel and the change trend of the output signal at the last moment; meanwhile, the multiplexer selects signals of an (i +1) th channel and transmits the signals to the front-end processing circuit;
pass through 2/3TCThe arithmetic processing circuit transmits the signal of the ith channel to the output stage circuit, and the output stage circuit is used for generating an analog signal to be output; meanwhile, the front-end processing circuit transmits signals of the (i +1) th channel to the algorithm processing circuit; meanwhile, the multiplexer selects signals of an i +2 th channel and transmits the signals to the front-end processing circuit;
through TCThe output stage circuit transmits the signal of the ith channel to the demultiplexer, the demultiplexer transmits the signal of the ith channel to the ith driver, and the ith driver controls the heat regulator of the ith integrated photonic device, so that the working state of the ith integrated photonic device is changed; meanwhile, the algorithm processing circuit transmits signals of the (i +1) th channel to the output stage circuit; meanwhile, the front-end processing circuit transmits signals of the (i + 2) th channel to the algorithm processing circuit; and simultaneously, the multiplexer selects the signal of the (i + 3) th channel and transmits the signal to the front-end processing circuit.
The invention also provides a multistage assembly line time division multiplexing feedback control system, which uses the multistage assembly line time division multiplexing feedback control method and comprises the following steps: the system comprises k refractive index information acquisition units, a multiplexer, a control circuit unit, a time sequence generation and control module, a demultiplexer, k drives, k heat regulators and k integrated photonic devices; the multiplexer comprises k input ends, 1 output end and 1 control end, the demultiplexer comprises k output ends, 1 input end and 1 control end, and k is an integer larger than 1;
the k input ends of the multiplexer are respectively connected with the k refractive index information acquisition units, the output end of the multiplexer is connected with one end of the control circuit unit, the other end of the control circuit unit is connected with the input end of the demultiplexer, the k output ends of the demultiplexer are respectively connected with the k drivers, the k drivers are respectively connected with the k heat conditioners, and the k heat conditioners are used for respectively controlling the temperature of the k integrated photonic devices;
the time sequence generation and control module is respectively connected with the control end of the multiplexer, the control circuit unit and the control end of the demultiplexer and is used for controlling the conduction of each control loop in a multi-stage pipeline time division multiplexing mode, wherein the ith control loop is a loop formed by an ith integrated photonic device, an ith refractive index information acquisition unit, an ith input end of the multiplexer, the control circuit unit, an ith output end of the demultiplexer, an ith driver and an ith heat modulator, i is more than or equal to 1 and less than or equal to k, and i is an integer.
Further, the integrated photonic device is an integrated photonic device whose operating point needs to be dynamically adjusted by a thermal regulator, and the implementation manner is one of the following:
a micro-ring resonator, a micro-ring modulator, a Mach-Zehnder interferometer, a Mach-Zehnder modulator, and a photodiode;
the realization mode of the heat regulator in the integrated photonic device is one of the following modes:
metal or alloy resistance, doping resistance, and an off-chip temperature regulation platform.
Further, the refractive index information obtaining unit is an on-chip or off-chip photonic device capable of obtaining an effective refractive index or a working state of the integrated photonic device, and the implementation mode is one of the following:
photodiodes, contactless integrated photonic probes, doped waveguides based on the photoconductive effect.
Further, the multiplexer and the demultiplexer are circuits having a channel selection function.
Further, the driving is a circuit capable of driving the heat regulator to work, and the implementation mode is one of the following modes:
the device comprises a power tube array, a low dropout linear regulator and a DC/DC circuit.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
the invention is based on that the integral control circuit is subjected to first-stage time division multiplexing to control a plurality of photonic devices; in the control circuit, different functional circuit modules are subjected to second-level time division multiplexing, and the number of controllable photonic devices is multiple times that of the traditional time division multiplexing method on the premise of not obviously increasing the area of the control circuit, so that the utilization rate of the functional circuit modules of the control circuit is improved, the number of controllable photonic devices is increased, and the control circuit is particularly suitable for large-scale integrated photonic systems.
Drawings
FIG. 1 is a timing diagram of a single control circuit controlling the operation of a single integrated photonic device;
FIG. 2 is a timing diagram of the direct time division multiplexing feedback control method for controlling the operation of a plurality of integrated photonic devices;
FIG. 3 is a timing diagram illustrating the operation of a pipeline time division multiplexing feedback control method for controlling a plurality of integrated photonic devices;
FIG. 4 is a timing diagram illustrating the operation of controlling a plurality of integrated photonic devices according to the multi-stage pipeline time division multiplexing feedback control method of the present invention;
FIG. 5 is a block diagram of a multi-stage pipeline TDM feedback control system according to the present invention;
FIG. 6 is a block diagram of a switch array based on a Mach-Zehnder interferometer controlled by the multi-stage pipeline time division multiplexing feedback control method provided by the present invention;
FIG. 7 is a block diagram of a multistage pipeline TDM feedback control method for controlling a high-order micro-loop filter according to the present invention;
fig. 8 is a block diagram of a structure of controlling the bias of the avalanche photodiode by the multi-stage pipeline time division multiplexing feedback control method provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention provides a time division multiplexing feedback control method for a multistage assembly line, which carries out time division multiplexing again on different functional circuit modules in a control circuit on the basis that an integral control circuit carries out time division multiplexing to control a plurality of photonic devices, thereby avoiding the functional circuit from being in an idle state and greatly improving the number of the controlled photonic devices. The timing principle of the control method of the present invention is illustrated as shown in fig. 4. Assuming that the thermo-optic modulation response time of the photonic device is TPTThe response time of the feedback control circuit is TC，TPT＝3TCWherein S, C and O are respectively 1/3T of the working time of the sampling circuit in the control circuit, the working time of the arithmetic processing circuit and the working time of the output stage circuitC. Through two-stage time division multiplexing, three functional circuit modules all work in an idle state. At this time, the number of photonic devices which can be controlled by the method is 12, and under the same condition, the number of photonic devices which can be controlled by the pipeline time division multiplexing control method is only 4.
Assuming that the thermo-optic modulation response time of the photonic device is TPTThe response time of the feedback control circuit is TC,，TPT＝N×TCThe control circuit can be divided into n functional circuit modules working sequentially, and the response time of each functional circuit module is m1·TC、m2·TC、......、mn·TCWherein, TCN is an integer greater than 2, and m is the response time of the control circuit unit1+m2+......+mn＝1，m1≤m2≤…≤mn(ii) a On the basis of not reducing the regulation speed of each photonic device, namely, the single response, waiting and control time of each photonic device is TPT+TCThe number of the photonic devices which can be controlled by the method is (N +1)/mn. In an optimal case, the control circuit may be divided into n functional circuit blocks working sequentially, and the response time of each functional circuit block is 1/n × TC. At the moment, on the basis of not reducing the regulation speed of each photonic device, the number of the photonic devices which can be controlled by the method is N x (N + 1); under the same condition, the number of the photonic devices which can be controlled by the pipeline time division multiplexing control method is number N +1, and the direct time division multiplexing control method sacrifices the regulation speed of each photonic device. It can be seen that the number of photonic devices that can be controlled by the control method of the present invention is n times that of the conventional control method under almost the same conditions.
Another aspect of the present invention provides a multistage pipeline time division multiplexing feedback control system, a block diagram of which is shown in fig. 5, including: the system comprises k refractive index information acquisition units, a multiplexer, a control circuit unit, a time sequence generation and control module, a demultiplexer, k drives, k heat regulators and k integrated photonic devices; the multiplexer comprises k input ends, 1 output end and 1 control end, the demultiplexer comprises k output ends, 1 input end and 1 control end, and k is an integer larger than 1;
the k input ends of the multiplexer are respectively connected with the k refractive index information acquisition units, the output end of the multiplexer is connected with one end of the control circuit unit, the other end of the control circuit unit is connected with the input end of the demultiplexer, the k output ends of the demultiplexer are respectively connected with the k drivers, the k drivers are respectively connected with the k heat conditioners, and the k heat conditioners are used for respectively controlling the temperature of the k integrated photonic devices;
the time sequence generation and control module is respectively connected with the control end of the multiplexer, the control circuit unit and the control end of the demultiplexer and is used for controlling the conduction of each control loop in a multi-stage pipeline time division multiplexing mode, wherein the ith control loop is a loop formed by an ith integrated photonic device, an ith refractive index information acquisition unit, an ith input end of the multiplexer, the control circuit unit, an ith output end of the demultiplexer, an ith driver and an ith heat modulator, i is more than or equal to 1 and less than or equal to k, and i is an integer.
The present invention is further illustrated in detail below using three specific examples.
Example one
In switch array applications, the switching state of each switching element is controlled using a multi-stage pipelined time-division multiplexed feedback control method, and each switching element is not limited to one thermal modulator. FIG. 6 is a schematic diagram of the present embodiment, the 4 × 4 switch array being composed of 2 × 2 Mach-Zehnder-interferometer-based switch elements; a trans-impedance amplifier, a sample hold circuit and a comparator are used as a front-end processing circuit to obtain slope information; an algorithm processing circuit is adopted and a climbing algorithm is utilized to determine an output trend; converting the output trend of the algorithm processing circuit into analog voltage by adopting an analog-to-digital converter; a thermal regulator which adopts a power tube to drive each switch; a photodiode is employed as the refractive index information acquisition unit. The method comprises the following specific steps:
step 1, after a part of light at the output end of each Mach-Zehnder interferometer switch element is coupled out, converting optical power into photocurrent through a photodiode;
step 2, the time sequence generation and control module firstly controls the multiplexer to select the photocurrent I of the ith switchMiConverting the voltage signals into appropriate voltage signals through a trans-impedance amplifier, and obtaining the variation trend information of the ith channel voltage signal after the common processing of a sample hold circuit and a comparator;
step 3, via 1/3TCThe time sequence generation and control module controls the algorithm processing circuit to work, compares the current input signal change trend information of the ith channel with the change trend information of the last output signal, and judges the current output change trend of the ith channel according to the comparison result;
step 4, generating time sequence at the same time of step 3And the control module controls the multiplexer to select the photocurrent I of the (I +1) th switchMi+1Converting the voltage signals into appropriate voltage signals through a trans-impedance amplifier, and obtaining the variation trend information of the voltage signals of the (i +1) th channel after the common processing of a sample-and-hold circuit and a comparator;
step 5, via 2/3TCThe time sequence generation and control module controls the analog-to-digital converter to work and converts the current output change trend signal of the ith channel into an analog voltage signal VHi；
And 6, simultaneously with the step 5, controlling the multiplexer to select the photocurrent I of the (I + 2) th switch by the time sequence generating and controlling moduleMi+2Converting the voltage signals into appropriate voltage signals through a trans-impedance amplifier, and obtaining the variation trend information of the voltage signals of the (i + 2) th channel after the common processing of a sample hold circuit and a comparator;
step 7, at the same time of step 5, the time sequence generation and control module controls the algorithm processing circuit to work, the current input signal change trend information of the (i +1) th channel is compared with the change trend information of the last output signal, and the current output change trend of the (i +1) th channel is judged according to the comparison result;
step 8, passing through TCThe time sequence generating and controlling module controls the demultiplexer to select the ith channel, and the analog voltage signal drives the thermal modulator of the ith switch element through the power tube so as to control the switch state of the switch element;
and 9, repeating the steps 1 to 8.
Example two
In the application of the high-order micro-ring filter, the resonance state of each micro-ring is controlled by a multi-stage assembly line time division multiplexing feedback control method, and the implementation mode of the micro-ring array is not limited. FIG. 7 is a diagram illustrating the embodiment, in which the high-order micro-ring filter is composed of a fourth-order micro-ring; a trans-impedance amplifier, a sampling holding circuit and a comparator are used as a front-end processing circuit to obtain slope information; an algorithm processing circuit is adopted to determine an output trend by utilizing a climbing algorithm; converting the output trend of the algorithm processing circuit into analog voltage by adopting an analog-to-digital converter; a power tube is adopted to drive the heat regulator of each micro-ring; a photodiode is employed as the refractive index information acquisition unit. The method comprises the following specific steps:
step 1, after coupling out a part of light of each micro-ring, converting optical power into photocurrent through a photodiode;
step 2, the time sequence generation and control module firstly controls the multiplexer to select the photocurrent I of the ith micro-ringMiConverting the voltage signals into appropriate voltage signals through a trans-impedance amplifier, and obtaining the variation trend information of the ith channel voltage signal after the common processing of a sample hold circuit and a comparator;
step 3, via 1/3TCThe time sequence generation and control module controls the algorithm processing circuit to work, compares the current input signal change trend information of the ith channel with the change trend information of the last output signal, and judges the current output change trend of the ith channel according to the comparison result;
step 4, at the same time of step 3, the time sequence generation and control module controls the multiplexer to select the photocurrent I of the (I +1) th micro-ringMi+1Converting the voltage signals into appropriate voltage signals through a trans-impedance amplifier, and obtaining the variation trend information of the voltage signals of the (i +1) th channel after the common processing of a sample-and-hold circuit and a comparator;
step 5, via 2/3TCThe time sequence generation and control module controls the analog-to-digital converter to work and converts the current output change trend signal of the ith channel into an analog voltage signal VHi；
And 6, simultaneously with the step 5, controlling the multiplexer to select the photocurrent I of the (I + 2) th micro-ring by the time sequence generating and controlling moduleMi+2Converting the voltage signals into appropriate voltage signals through a trans-impedance amplifier, and obtaining the variation trend information of the voltage signals of the (i + 2) th channel after the common processing of a sample hold circuit and a comparator;
step 7, at the same time of step 5, the time sequence generation and control module controls the algorithm processing circuit to work, the current input signal change trend information of the (i +1) th channel is compared with the change trend information of the last output signal, and the current output change trend of the (i +1) th channel is judged according to the comparison result;
step 8, passing through TCThe time sequence generation and control module controls the demultiplexer to select the ith channel, and the analog voltage signal drives the heat regulator of the ith micro-ring through the power tube so as to control the resonance state of the micro-ring;
and 9, repeating the steps 1 to 8.
EXAMPLE III
In receiver applications where avalanche photodiodes are used to detect optical signals, the bias voltage of each avalanche photodiode is controlled using a multi-stage pipelined time division multiplexed feedback control method. Fig. 8 is a schematic diagram of this embodiment, in a dense wavelength division multiplexing receiver, a channel demultiplexer is used to demodulate a channel, and data information is restored through an avalanche photodiode and a receiving circuit. Obtaining a low pass filter output voltage V using a digital-to-analog converter as a front end processing circuitP(ii) a The algorithm processing circuit acquires the third derivative information of the input signal and determines the output trend by using a climbing algorithm; converting the output trend of the algorithm processing circuit into analog voltage by adopting an analog-to-digital converter; outputting a voltage V using a boost power stageBAs a bias for each avalanche diode. The method comprises the following specific steps:
step 1, adjusting the resonance wavelength of a certain micro-ring to demodulate a certain channel, converting the optical power into photocurrent through an avalanche photodiode, and reducing the photocurrent into data information through a receiving circuit;
step 2, the time sequence generation and control module controls the multiplexer to select the monitoring output voltage V of the ith avalanche photodiodePiConverting the signal into a digital signal through a digital-to-analog converter;
step 3, via 1/3TCThe time sequence generation and control module controls the algorithm processing circuit to work to obtain the third derivative information of the ith channel voltage signal change, the third derivative information currently input by the ith channel is compared with the change trend information of the last output signal, and the current output change trend of the ith channel is judged according to the comparison result;
step 4, simultaneously with the step 3The time sequence generation and control module controls the multiplexer to select the monitoring output voltage V of the (i +1) th avalanche photodiodePi+1Converting the voltage signal into a digital signal through an analog-to-digital converter, and obtaining the third derivative information of the change of the voltage signal of the (i +1) th channel;
step 5, via 2/3TCThe time sequence generation and control module controls the analog-to-digital converter to work and converts the current output change trend signal of the ith channel into an analog voltage signal;
step 6, at the same time of step 5, the time sequence generation and control module controls the multiplexer to select the monitoring output voltage V of the (i + 2) th avalanche photodiodePi+2Converting the signal into a digital signal through a digital-to-analog converter;
step 7, in the step 5, the time sequence generation and control module controls the operation of the algorithm processing circuit to obtain the third derivative information of the voltage signal change of the (i +1) th channel, compares the currently input third derivative information of the (i +1) th channel with the change trend information of the last output signal, and judges the current output change trend of the (i +1) th channel according to the comparison result;
step 8, passing through TCThe time sequence generation and control module controls the demultiplexer to select the ith channel, and the analog voltage signal outputs a voltage V through the boosting power stageBiAs the bias of the ith avalanche diode, thereby controlling the working state of the avalanche diode;
and 9, repeating the steps 1 to 8.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1.一种多级流水线时分复用反馈控制方法，应用于片上集成光子系统，其特征在于，包括：1. a multi-stage pipeline time-division multiplexing feedback control method, applied to an integrated photonic system on a chip, is characterized in that, comprising: 将控制电路单元分为n个顺序工作的功能电路模块，每个功能电路模块的响应时间分别为m1·TC、m2·TC、......、mn·TC，其中，TC为控制电路单元的响应时间，n为大于2的整数，且m1+m2+......+mn＝1，m1≤m2≤…≤mn；The control circuit unit is divided into n functional circuit modules that work in sequence, and the response time of each functional circuit module is m 1 ·TC , m 2 · TC , ..., m n · TC , respectively, Wherein, T C is the response time of the control circuit unit, n is an integer greater than 2, and m 1 +m 2 +...+m n =1, m 1 ≤m 2 ≤...≤m n ; 在时序产生与控制模块的控制下，复用器选取第i个通道的信号传输给第1个功能电路模块，其中，i为大于0的整数；Under the control of the timing generation and control module, the multiplexer selects the signal of the i-th channel and transmits it to the first functional circuit module, where i is an integer greater than 0; 经过m1·TC，第1个功能电路模块将第i个通道的信号传输给第2个功能电路模块；同时复用器选取第i+1个通道的信号传输给第1个功能电路模块；After m 1 ·TC , the first functional circuit module transmits the signal of the i - th channel to the second functional circuit module; at the same time, the multiplexer selects the i+1-th channel signal and transmits it to the first functional circuit module ; 经过m1·TC+m2·TC，第2个功能电路模块将第i个通道的信号传输给第3个功能电路模块；同时第1个功能电路模块将第i+1个通道的信号传输给第2个功能电路模块；同时复用器选取第i+2个通道的信号传输给第1个功能电路模块；After m 1 ·T C +m 2 ·TC , the second functional circuit module transmits the signal of the i - th channel to the third functional circuit module; at the same time, the first functional circuit module transmits the signal of the i+1-th channel The signal is transmitted to the second functional circuit module; at the same time, the multiplexer selects the signal of the i+2th channel and transmits it to the first functional circuit module; 直至经过TC，第n个功能电路模块将第i个通道的信号传输给解复用器，解复用器将第i个通道的信号传输给第i个驱动，第i个驱动控制第i个集成光子器件的热调器，从而改变第i个集成光子器件的工作状态。Until after T C , the n-th functional circuit module transmits the signal of the i-th channel to the demultiplexer, and the de-multiplexer transmits the signal of the i-th channel to the i-th driver, and the i-th driver controls the i-th channel. A thermal regulator of an integrated photonic device, thereby changing the working state of the i-th integrated photonic device. 2.如权利要求1所述的多级流水线时分复用反馈控制方法，其特征在于，所述n＝3，且m1＝m2＝m3＝1/3；2. The multi-stage pipeline time division multiplexing feedback control method according to claim 1, wherein the n=3, and m 1 =m 2 =m 3 =1/3; 所述控制电路单元包括：前端处理电路、算法处理电路、输出级电路；The control circuit unit includes: a front-end processing circuit, an algorithm processing circuit, and an output stage circuit; 在时序产生与控制模块的控制下，复用器选取第i个通道的信号传输给所述前端处理电路，所述前端处理电路用于判断第i个通道信号变化的趋势，其中，i为大于0的整数；Under the control of the timing generation and control module, the multiplexer selects the signal of the ith channel and transmits it to the front-end processing circuit, and the front-end processing circuit is used to determine the trend of the signal change of the ith channel, where i is greater than an integer of 0; 经过1/3TC，所述前端处理电路将第i个通道的信号传输给所述算法处理电路，所述算法处理电路用于根据第i个通道当前输入信号的斜率信息以及上一时刻输出信号的变化趋势，决定第i个通道当前输出信号的变化趋势；同时复用器选取第i+1个通道的信号传输给所述前端处理电路；After 1/3TC, the front - end processing circuit transmits the signal of the ith channel to the algorithm processing circuit, and the algorithm processing circuit is used to output the signal according to the slope information of the current input signal of the ith channel and the previous moment. The change trend of the ith channel determines the change trend of the current output signal of the ith channel; at the same time, the multiplexer selects the signal of the ith+1th channel to transmit to the front-end processing circuit; 经过2/3TC，所述算法处理电路将第i个通道的信号传输给所述输出级电路，所述输出级电路用于产生需要输出的模拟信号；同时所述前端处理电路将第i+1个通道的信号传输给所述算法处理电路；同时复用器选取第i+2个通道的信号传输给所述前端处理电路；After 2/ 3TC , the algorithm processing circuit transmits the signal of the i-th channel to the output stage circuit, and the output-stage circuit is used to generate the analog signal to be output; The signal of 1 channel is transmitted to the algorithm processing circuit; at the same time, the multiplexer selects the signal of the i+2th channel and transmits it to the front-end processing circuit; 经过TC，所述输出级电路将第i个通道的信号传输给解复用器，解复用器将第i个通道的信号传输给第i个驱动，第i个驱动控制第i个集成光子器件的热调器，从而改变第i个集成光子器件的工作状态；同时所述算法处理电路将第i+1个通道的信号传输给所述输出级电路；同时所述前端处理电路将第i+2个通道的信号传输给所述算法处理电路；同时复用器选取第i+3个通道的信号传输给所述前端处理电路。After T C , the output stage circuit transmits the signal of the ith channel to the demultiplexer, and the demultiplexer transmits the signal of the ith channel to the ith driver, and the ith driver controls the ith integrated circuit the thermal regulator of the photonic device, thereby changing the working state of the i-th integrated photonic device; at the same time, the algorithm processing circuit transmits the signal of the i+1-th channel to the output stage circuit; The signals of the i+2 channels are transmitted to the algorithm processing circuit; at the same time, the multiplexer selects the signals of the i+3th channel to transmit to the front-end processing circuit. 3.一种多级流水线时分复用反馈控制系统，使用权利要求1或2所述的多级流水线时分复用反馈控制方法，其特征在于，包括：k个折射率信息获取单元、复用器、控制电路单元、时序产生与控制模块、解复用器、k个驱动、k个热调器、k个集成光子器件；所述复用器包含k个输入端、1个输出端和1个控制端，所述解复用器包含k个输出端、1个输入端和1个控制端，k为大于1的整数；3. a multistage pipeline time division multiplexing feedback control system, using the multistage pipeline time division multiplexing feedback control method according to claim 1 or 2, is characterized in that, comprising: k refractive index information acquisition units, multiplexers , control circuit unit, timing generation and control module, demultiplexer, k drivers, k thermal regulators, k integrated photonic devices; the multiplexer includes k input terminals, 1 output terminal and 1 a control end, the demultiplexer includes k output ends, 1 input end and 1 control end, where k is an integer greater than 1; 所述复用器的k个输入端分别与k个折射率信息获取单元相连接，所述复用器的输出端与所述控制电路单元的一端相连接，所述控制电路单元的另一端与所述解复用器的输入端相连接，所述解复用器的k个输出端分别与k个驱动相连接，所述k个驱动分别与k个热调器相连接，所述k个热调器分别控制k个集成光子器件的温度；The k input ends of the multiplexer are respectively connected to the k refractive index information acquisition units, the output end of the multiplexer is connected to one end of the control circuit unit, and the other end of the control circuit unit is connected to the control circuit unit. The input terminals of the demultiplexer are connected to each other, the k output terminals of the demultiplexer are respectively connected to the k drivers, and the k drivers are respectively connected to the k thermal modulators. The thermal regulator controls the temperature of the k integrated photonic devices respectively; 所述时序产生与控制模块分别与所述复用器的控制端、所述控制电路单元和所述解复用器的控制端相连接，用于通过多级流水线时分复用方式控制每个控制环路导通，其中，第i个控制环路为第i个集成光子器件、第i个折射率信息获取单元、复用器的第i个输入端、控制电路单元、解复用器的第i个输出端、第i个驱动以及第i个热调器组成的环路，1≤i≤k，i为整数。The timing generation and control module is respectively connected with the control terminal of the multiplexer, the control circuit unit and the control terminal of the demultiplexer, and is used to control each control through a multi-stage pipeline time division multiplexing method. The loop is turned on, wherein the ith control loop is the ith integrated photonic device, the ith refractive index information acquisition unit, the ith input of the multiplexer, the control circuit unit, and the ith of the demultiplexer. A loop composed of i output terminals, i-th driver and i-th thermal regulator, 1≤i≤k, i is an integer. 4.如权利要求3所述的多级流水线时分复用反馈控制系统，其特征在于，所述集成光子器件为需要通过热调器动态调节其工作点的集成光子器件，实现方式为以下之一：4. The multi-stage pipeline time-division multiplexing feedback control system according to claim 3, wherein the integrated photonic device is an integrated photonic device that needs to dynamically adjust its operating point by a thermal regulator, and the implementation mode is one of the following : 微环谐振器，微环调制器，马赫曾德尔干涉仪，马赫曾德尔调制器，光电二极管；Micro-ring resonators, micro-ring modulators, Mach-Zehnder interferometers, Mach-Zehnder modulators, photodiodes; 所述集成光子器件中的热调器实现方式为以下之一：The implementation of the thermal regulator in the integrated photonic device is one of the following: 金属或合金电阻，掺杂电阻，片外温度调节平台。Metal or alloy resistors, doped resistors, off-chip temperature regulation platforms. 5.如权利要求3所述的多级流水线时分复用反馈控制系统，其特征在于，所述折射率信息获取单元为能够获取集成光子器件有效折射率或者工作状态的片上或者片外光子器件，实现方式为以下之一：5. The multi-stage pipeline time-division multiplexing feedback control system according to claim 3, wherein the refractive index information acquisition unit is an on-chip or off-chip photonic device capable of acquiring an effective refractive index of an integrated photonic device or a working state, The implementation is one of the following: 光电二极管，无接触的集成光子探针，基于光电导效应的掺杂波导。Photodiodes, contactless integrated photonic probes, doped waveguides based on the photoconductive effect. 6.如权利要求3所述的多级流水线时分复用反馈控制系统，其特征在于，所述复用器和所述解复用器为具有通道选择功能的电路。6 . The multi-stage pipeline time division multiplexing feedback control system according to claim 3 , wherein the multiplexer and the demultiplexer are circuits with a channel selection function. 7 . 7.如权利要求3所述的多级流水线时分复用反馈控制系统，其特征在于，所述驱动为能够驱动热调器工作的电路，实现方式为以下之一：7. The multi-stage pipeline time-division multiplexing feedback control system according to claim 3, wherein the driving is a circuit capable of driving the thermal regulator to work, and the implementation is one of the following: 功率管阵列，低压差线性稳压器，DC/DC电路。Power tube arrays, low dropout linear regulators, DC/DC circuits.
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