Controllable stepping motor tuning-based parallel architecture photonic integrated chip array control system and control method

Abstract

This invention discloses a control system and method for a parallel architecture photonic integrated chip array based on controllable stepper motor tuning, belonging to the field of optical chips. The system includes: a parallel architecture photonic integrated chip array for emitting optical signals of different wavelengths; a tunable optical path coupling spherical lens fiber optic module coupled to the output channel of the parallel architecture photonic integrated chip array for transmitting optical signals; a controllable stepper motor for driving the tunable optical path coupling spherical lens fiber optic module to move linearly, thereby coupling the tunable optical path coupling spherical lens fiber optic module to different output channels of the parallel architecture photonic integrated chip array; and an optoelectronic fusion collaborative control module for converting stored power-on data into drive current according to a preset timing sequence to drive the parallel architecture photonic integrated chip array to perform linear frequency sweep; it also controls the drive current of the controllable stepper motor in real time. This invention significantly improves the system's frequency sweep bandwidth and output power.

Description

Technical Field

[0001] This invention belongs to the field of optical chips, specifically relating to a control system and control method for a parallel architecture photonic integrated chip array based on controllable stepper motor tuning. Background Technology

[0002] As the core light source of optoelectronic systems, laser chips directly determine the application level of technologies such as optical sensing, optical communication, and optical switching. In the field of optical switching, high-speed optical interconnects for AI computing clusters rely on dynamic, high-density wavelength routing. High-bandwidth, high-power tunable laser chips are the key physical foundation for achieving this goal and overcoming the "computing power bottleneck." In the field of optical sensing, precision sensors such as robot force sensors need to perceive multidimensional forces and micro-strains in real time. High-bandwidth swept-frequency light sources are a prerequisite for achieving high spatial resolution measurements, while high-power output ensures the signal-to-noise ratio and reliability for long-distance or multi-point sensing. In the field of optical communication, scenarios such as long-distance transmission and drone networks have extremely high requirements for link budget and spectrum capacity. High power can overcome long-distance attenuation, while large bandwidth provides the necessary spectrum resources for dense nodes and high-speed communication. Therefore, developing advanced laser chips and control systems with both high bandwidth and high power characteristics has become a common key requirement for promoting technological upgrades in these fields.

[0003] Currently, mainstream technologies for laser chips in terms of bandwidth expansion, power enhancement, and drive control all have limitations. Regarding bandwidth expansion, solutions based on multi-laser integration and multiplexing heavily rely on multi-stage multiplexers, whose insertion loss accumulates linearly with the number of channels, leading to a sharp decrease in the total system output power and poor expansion flexibility and configurability. In terms of power enhancement, on-chip integrated semiconductor optical amplifiers (SOAs) introduce significant noise and power consumption, while large cavity designs often sacrifice beam quality and modulation speed, making it difficult to balance high power and high performance. Regarding drive control, traditional discrete control architectures struggle to achieve high-precision synchronization of laser drive, temperature control, and wavelength tuning, resulting in problems such as response lag, wavelength drift, and power instability during dynamic operation, limiting the system's application in high-speed, precision scenarios. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a parallel architecture photonic integrated chip array control system and method based on controllable stepper motor tuning. The invention employs multiple laser bars with different center wavelengths connected in parallel, effectively broadening the tunable bandwidth of the laser chip and solving the problem of insufficient bandwidth scalability. A compact, high-power controllable stepper motor drives a tunable optical path coupling spherical lens fiber optic module, achieving efficient dynamic coupling with the photonic chip, thus avoiding the inherent loss accumulation and power deficiency problems of traditional multi-stage multiplexing schemes. Through an optoelectronic fusion collaborative control module, precise synchronous control of the optical chip and stepper motor is achieved, effectively improving the overall output stability and reliability of the system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning, comprising: Parallel architecture photonic integrated chip arrays are used to emit optical signals of different wavelengths; A tunable optical path coupled spherical lens fiber optic module is coupled to the output channel of a parallel architecture photonic integrated chip array for transmitting optical signals; A controllable stepper motor is used to drive the linear movement of the tunable optical path coupled spherical lens fiber optic module, thereby coupling the tunable optical path coupled spherical lens fiber optic module with different output channels of the parallel architecture photonic integrated chip array. The optoelectronic fusion collaborative control module is used to convert the stored power-on data into drive current according to the preset timing sequence, and drive the parallel architecture photonic integrated chip array to perform linear frequency sweep; it is also used to control the drive current of the controllable stepper motor in real time.

[0007] To optimize the above technical solution, the specific measures also include: Furthermore, the parallel architecture photonic integrated chip array is composed of n distributed feedback laser chip bars connected in parallel in an n×1 array. The distributed feedback laser chip bars are arranged at equal intervals, and the center wavelength interval of each distributed feedback laser chip bar is kept consistent. The distributed feedback laser chip bars are fabricated using REC technology.

[0008] Furthermore, the tunable optical path coupled spherical lens fiber module includes a spherical lens fiber, a mode converter, and a single-mode fiber; The spherical lens fiber is fixed on a controllable stepper motor. The controllable stepper motor drives the spherical lens fiber to align with different output channels of the parallel architecture photonic integrated chip array. The optical signal coupled into the spherical lens fiber is converted into a mode by a mode converter, which converts the multiple higher-order modes contained in the multimode optical field into the fundamental mode and then inputs it into the single-mode fiber. The end face of the optical fiber of the spherical lens is a semi-circular spherical structure.

[0009] Furthermore, the controllable stepper motor is a linear motor, and its slider is guided and supported by double guide rails; the controllable stepper motor adjusts its movement speed according to the received real-time drive current.

[0010] Furthermore, the optoelectronic fusion collaborative control module includes a main control unit, a photonic integrated chip array drive control unit, and a switch switching control unit; The main control unit outputs chip drive current data to the photonic integrated chip array drive control unit. The output terminal of the photonic integrated chip array drive control unit is connected to the current signal input terminal of the switch switching control unit. The main control unit sends digital gating signals to the switch selection signal input terminal of the switch switching control unit. The multiple output ports of the switch switching control unit are connected to different distributed feedback laser chip bars. The switch switching control unit turns on the corresponding channel according to the digital gating signal, so that the drive current is applied to the corresponding distributed feedback laser chip bar. By sending digital gating signals in sequence through the main control unit, the sequential gating and power-on of each distributed feedback laser chip bar is realized, thereby completing the sequential frequency sweep.

[0011] Furthermore, the optoelectronic fusion collaborative control module also includes a temperature control unit. The parallel architecture photonic integrated chip array is internally packaged with a thermistor and a TEC. The temperature control unit receives the set temperature voltage value sent by the main control unit, and simultaneously collects the measured chip temperature voltage value across the thermistor. Then, it calculates the difference between the set temperature voltage value and the measured chip temperature voltage value, and sends the difference to the main control unit. The main control unit adjusts the output TEC drive current data according to the difference, thereby changing the internal ambient temperature of the parallel architecture photonic integrated chip array.

[0012] Furthermore, the optoelectronic fusion collaborative control module also includes a controllable stepper motor drive control unit. The main control unit uses a PID control mechanism to control the motor drive current data input to the controllable stepper motor drive control unit in real time. The controllable stepper motor drive control unit outputs the motor drive current to adjust the movement speed of the controllable stepper motor, so that the tunable optical path coupled spherical lens fiber optic module is aligned with the output end of the required distributed feedback laser chip bar.

[0013] Furthermore, the optoelectronic fusion collaborative control module also includes a feedback control unit, which includes a first-stage beam splitter, a second-stage beam splitter, a wavelength locker, and a photodetector; The first-stage beam splitter splits the optical signal output from the tunable optical path coupled spherical lens fiber module into two paths, one for outputting the optical signal and the other for connecting to the second-stage beam splitter. The second-stage beam splitter further splits the optical signal into beams at a 1:1 ratio, which are then sent to the wavelength locker and the photodetector, respectively. The wavelength locker is used to detect the deviation between the actual output wavelength and the target wavelength, and feeds the wavelength difference back to the main control unit, thereby dynamically adjusting the power-on parameters of the parallel architecture photonic integrated chip array, and thus controlling the output wavelength. The photodetector monitors the output optical power in real time and feeds it back to the main control unit to fine-tune the displacement control signal of the controllable stepper motor, thereby controlling the output optical power.

[0014] This invention also proposes a control method for a parallel architecture photonic integrated chip array based on controllable stepper motor tuning, comprising the following steps: S1: All parameters are set to zero, and the controllable stepper motor is positioned at the output channel of the first distributed feedback laser chip bar. S2: Turn on the channel switch of the first distributed feedback laser chip bar and start the power-on frequency sweep operation by setting the start_flag directly to "1"; S3: Sequentially read and send power-on data, perform frequency sweep on the currently connected distributed feedback laser chip bar, and increment the address pointer and the current power-on data sequence number cycle1 by 1 for each power-on data read. When cycle1 reaches the first threshold, it indicates that the frequency sweep of the current distributed feedback laser chip bar is completed, the laser chip bar sequence number cycle2 is incremented by 1, and the start_flag flag for starting the power-on frequency sweep operation is set to "0". S4: Determine whether the laser chip bar number cycle2 is equal to n-1, where n represents the total number of distributed feedback laser chip bars. If yes, return to step S1; otherwise, set the switch switching flag sweep_flag1 and the stepper motor displacement flag sweep_flag2 to "1" to start channel switching and motor displacement. S5: The switch switching control unit increments the switch control sequence signal by 1, turns on the channel switch of the corresponding distributed feedback laser chip bar, and sets the switch switching flag sweep_flag1 to "0"; S6: The controllable stepper motor drive control unit drives the motor to move to the next target channel position. After the controllable stepper motor is in position, the conversion flag shift_flag is set to "1" and the stepper motor displacement flag sweep_flag2 is set to "0". After detecting the rising edge of the conversion flag shift_flag, the start flag start_flag for starting the power-on sweep operation is set to "1" again, the conversion flag shift_flag is set to "0", the next set of power-on data is sent, and the process returns to step S3.

[0015] The beneficial effects of this invention are: (1) The sweep bandwidth of the present invention is significantly improved: by integrating multiple distributed feedback (DFB) laser bars with specific distribution of center wavelengths in parallel, the total sweep bandwidth of the system becomes a linear superposition of the bandwidths of each unit, thereby effectively expanding the overall sweep range.

[0016] (2) The present invention improves bandwidth scalability and system design flexibility: the parallel architecture allows the total system bandwidth to be directly adjusted by freely increasing or decreasing the number of laser bars, making the system modular and configurable, and significantly enhancing the design flexibility and adaptability.

[0017] (3) The present invention ensures high output power: the spherical lens fiber is dynamically aligned and coupled by driving the stepper motor, replacing the traditional multi-stage multiplexing architecture, avoiding the accumulation of insertion loss caused by multi-stage multiplexing devices, thereby ensuring high optical power output efficiency.

[0018] (4) The present invention has high frequency sweep accuracy: the current tuning mechanism is used to control the output wavelength of the chip, which has higher wavelength accuracy compared with the temperature tuning method. The system integrates a wavelength lock-in feedback unit to monitor the wavelength deviation in real time and dynamically adjust the drive current to ensure that the output wavelength remains stable near the target value for a long time.

[0019] (5) The present invention has strong output power stability: the stepper motor has the characteristics of fast dynamic response and high positioning accuracy, and can quickly and accurately reach the target position. With the optical power detection feedback mechanism, the system can sense the output power fluctuation in real time, and optimize the coupling state by fine-tuning the motor position to maintain the stability of the output optical power. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning of the present invention. Figure 2 This is a schematic diagram of the parallel architecture photonic integrated chip array and its coupling method of the present invention; Figure 3 This is a schematic diagram illustrating the coupling principle between the tunable optical path coupling spherical lens fiber and the parallel architecture photonic integrated chip array of the present invention. Figure 4 This is a flowchart of a control method for a parallel architecture photonic integrated chip array based on controllable stepper motor tuning. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] Example 1 This invention proposes a parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning. The overall structure of the system is as follows: Figure 1 As shown, it includes: a parallel architecture photonic integrated chip array, a tunable optical path coupled spherical lens fiber optic module, a controllable stepper motor, and an optoelectronic fusion collaborative control module; A parallel-architecture photonic integrated chip array is used to emit optical signals of different wavelengths. This array consists of n distributed feedback laser chip bars connected in parallel in an n×1 array. The distributed feedback laser chip bars are arranged at equal intervals, and the center wavelength intervals of all distributed feedback laser chip bars remain consistent. For example... Figure 2 As shown in the figure, marked 1 represents the parallel architecture photonic integrated chip array. This embodiment uses eight distributed feedback (DFB) laser chip bars. Adjusting the sweep bandwidth range can be achieved simply by adding or removing parallel chip bars, enhancing the system's design flexibility. This solves the technical contradiction in traditional architectures where increasing the number of lasers leads to cascading multiplexers and a sharp drop in optical power, making it impossible to balance high power and large bandwidth.

[0023] The distributed feedback laser chip bar is fabricated using a reconstructed equivalent chirp (REC) technique. This process adds a contact exposure to the holographic exposure, and by controlling the period or displacement of the sampling grating, high-precision fabrication of complex grating structures can be achieved. Compared with traditional methods, this process significantly improves the fabrication accuracy of the Bragg grating while effectively controlling costs and shortening the cycle time, thereby enabling precise control of the DFB laser output wavelength. The fabrication process steps are as follows: S1: After the substrate is cleaned, photoresist is spin-coated onto it, typically with a thickness of about 150nm, and then the photoresist is baked. S2: Periodic stripe structures are generated using holographic exposure. S3: Perform a mask contact exposure after completing the holographic exposure; S4: After the contact exposure is completed, development begins to obtain the target grating pattern; S5: Perform an etching operation to transfer the pattern onto the raster layer of the substrate; S6: Clean the photoresist using steps such as acetone solution and glow discharge; A tunable optical path-coupled spherical lens fiber optic module is coupled to the output channel of a parallel-architecture photonic integrated chip array for transmitting optical signals. When a certain output port of the array is in active light-emitting mode, a controllable stepper motor drives the tunable optical path-coupled spherical lens fiber optic module to move to that port for coupling. When the port is not active, no coupling occurs. This solution replaces the traditional multi-stage Y-multiplexer and semiconductor optical amplifier (SOA), thus effectively avoiding the cumulative power loss caused by multi-stage multiplexing.

[0024] The tunable optical path coupled spherical lens fiber module includes a spherical lens fiber, a mode converter, and a single-mode fiber; The spherical lens fiber is fixed on a controllable stepper motor. The controllable stepper motor drives the spherical lens fiber to align with different output channels of the parallel architecture photonic integrated chip array. The optical signal coupled into the spherical lens fiber is converted into a mode by a mode converter, which converts the multiple higher-order modes contained in the multimode optical field into the fundamental mode and then inputs it into the single-mode fiber. The end face of the optical fiber of the spherical lens is a semi-circular spherical structure.

[0025] like Figure 2 As shown, label 4 represents the tunable optical path coupling spherical lens fiber optic module, which is located behind the output port of the precision photonic integrated chip array. It is mainly used to achieve high-efficiency optical transmission with the parallel architecture photonic integrated chip array. Compared with the traditional solution of embedding multi-stage Y-multiplexers and optical power amplifiers in the chip, the tunable optical path coupling spherical lens fiber optic module is external and independent of the precision photonic integrated chip, which simplifies the structure of the chip itself, reduces the difficulty of manufacturing process, and helps to improve the yield of chip production.

[0026] Figure 3 Among , , These represent the refractive indices of air, fiber core, and cladding, respectively. This represents the radius of the spherical lens. Indicates the diameter of the optical fiber core. Indicates the aperture angle. The aperture angle represents the critical angle for total internal reflection. Compared to ordinary planar lens fiber, tunable optical path coupled spherical lens fiber has a larger aperture angle, thus enabling it to receive laser chip output beams with larger divergence angles and achieve efficient total internal reflection transmission, thereby enhancing the alignment tolerance of the system.

[0027] A controllable stepper motor is used to drive the linear movement of the tunable optical path coupled spherical lens fiber optic module, thereby coupling the tunable optical path coupled spherical lens fiber optic module with different output channels of the parallel architecture photonic integrated chip array. The controllable stepper motor is a linear motor, and its slider is guided and supported by dual guide rails. The controllable stepper motor adjusts its movement speed according to the received real-time drive current.

[0028] like Figure 2 As shown in the figure, mark 2 represents the dual guide rails, and mark 3 represents the slider. The compact high-power controllable stepper motor is a linear motor, and its slider is guided and supported by the dual guide rails. The tunable coupling optical path spherical lens fiber is fixed on the slider.

[0029] The displacement process of the compact high-power controllable stepper motor is as follows: the movement speed is adjusted according to the received real-time drive current, and when it is far away from the target position, it approaches at a higher speed and maintains stable operation; when it approaches the target position, it decelerates rapidly by applying a reverse drive current, and finally drives the lens fiber to accurately reach the predetermined position.

[0030] The optoelectronic fusion collaborative control module is used to convert the stored power-on data into drive current according to the preset timing sequence, and drive the parallel architecture photonic integrated chip array to perform linear frequency sweep; it is also used to control the drive current of the controllable stepper motor in real time.

[0031] The optoelectronic fusion collaborative control module includes a main control unit, a photonic integrated chip array drive control unit, and a switch switching control unit. The main control unit uses a field-programmable gate array (FPGA) to realize the timing control and data transmission of the entire control system.

[0032] The main control unit outputs chip drive current data to the photonic integrated chip array drive control unit. The output terminal of the photonic integrated chip array drive control unit is connected to the current signal input terminal of the switch switching control unit. The main control unit sends digital gating signals to the switch selection signal input terminal of the switch switching control unit. The multiple output ports of the switch switching control unit are connected to different distributed feedback laser chip bars. The switch switching control unit turns on the corresponding channel according to the digital gating signal, so that the drive current is applied to the corresponding distributed feedback laser chip bar. By sending digital gating signals in sequence through the main control unit, the sequential gating and power-on of each distributed feedback laser chip bar is realized, thereby completing the sequential frequency sweep.

[0033] The optoelectronic fusion collaborative control module also includes a temperature control unit. The parallel architecture photonic integrated chip array is internally packaged with a thermistor and a TEC (thermoelectric cooler). The temperature control unit receives the set temperature voltage value sent by the main control unit, and simultaneously acquires the measured chip temperature voltage value across the thermistor. Then, it calculates the difference between the set temperature voltage value and the measured chip temperature voltage value, and sends the difference to the main control unit. The main control unit adjusts the output TEC drive current data according to the difference, thereby changing the internal ambient temperature of the parallel architecture photonic integrated chip array.

[0034] The optoelectronic fusion collaborative control module also includes a controllable stepper motor drive control unit. The main control unit uses a PID control mechanism to control the motor drive current data input to the controllable stepper motor drive control unit in real time. The controllable stepper motor drive control unit outputs the motor drive current to adjust the movement speed of the controllable stepper motor, so that the tunable optical path coupled spherical lens fiber optic module is aligned with the output end of the required distributed feedback laser chip bar.

[0035] The precision photonic integrated chip array drive control unit works in conjunction with the switch switching control unit to achieve sequential drive control of the chip array. It also coordinates with the controllable stepper motor drive control unit to complete the integrated collaborative control of the photonic chip and the stepper motor. The specific workflow is as follows: After system initialization, the main control unit controls the stepper motor to move to the first output channel, ensuring efficient alignment between the lens fiber and the chip's first output channel. Simultaneously, the main control unit sends a digital strobe signal to switch the switch to the first channel. After receiving the stepper motor's positioning signal, the main control unit reads the power-on data of the first channel, converts it into drive current via the precision photonic integrated chip drive control unit, and applies this current to the corresponding laser bar through the switch. The laser emitted from the chip is coupled and output through the fiber optic module. After the first channel is driven, the main control unit controls the stepper motor to move to the second channel and repeats the above drive and coupling process, sequentially completing the power-on and output of all channels, ultimately achieving high-bandwidth, high-power linear frequency sweep.

[0036] The optoelectronic fusion collaborative control module also includes a feedback control unit, which includes a first-stage beam splitter, a second-stage beam splitter, a wavelength locker, and a photodetector. The first-stage beam splitter splits the optical signal output from the tunable optical path coupled spherical lens fiber module into two paths, one for outputting the optical signal and the other for connecting to the second-stage beam splitter. The second-stage beam splitter further splits the optical signal into beams at a 1:1 ratio, which are then sent to the wavelength locker and the photodetector, respectively. The wavelength locker is used to detect the deviation between the actual output wavelength and the target wavelength, and feeds the wavelength difference back to the main control unit, thereby dynamically adjusting the power-on parameters of the parallel architecture photonic integrated chip array, and thus controlling the output wavelength. The photodetector monitors the output optical power in real time and feeds it back to the main control unit to fine-tune the displacement control signal of the controllable stepper motor, thereby controlling the output optical power.

[0037] Example 2 This invention proposes a control method for a parallel architecture photonic integrated chip array based on controllable stepper motor tuning, which is implemented through the system in Embodiment 1, as follows: Figure 4 As shown, the precision photonic integrated chip array drive control unit works in conjunction with the switch switching control unit to achieve sequential drive control of the chip array, and coordinates with the controllable stepper motor drive control unit to complete the integrated collaborative control of the photonic chip and the stepper motor. The actual meanings of the various flag signals in the figure are as follows: cycle2 indicates the laser bar number currently performing a frequency sweep operation; cycle1 indicates the current power-on data number that has been sent; rising edge of shift_flag indicates that the stepper motor has reached the target position; start_flag indicates whether to start the power-on frequency sweep operation; sweep_flag1 indicates whether to perform a switch change; sweep_flag2 indicates whether to perform stepper motor displacement.

[0038] The method includes the following steps: S1: All parameters are set to zero, and the controllable stepper motor is positioned at the output channel of the first distributed feedback laser chip bar. S2: Turn on the channel switch of the first distributed feedback laser chip bar and start the power-on frequency sweep operation by setting the start_flag directly to "1"; S3: Sequentially read and send power-on data, perform frequency sweep on the currently connected distributed feedback laser chip bar, and increment the address pointer and the current power-on data sequence number cycle1 by 1 for each power-on data read. When cycle1 reaches the first threshold, it indicates that the frequency sweep of the current distributed feedback laser chip bar is completed, the laser chip bar sequence number cycle2 is incremented by 1, and the start_flag flag for starting the power-on frequency sweep operation is set to "0". S4: Determine whether the laser chip bar number cycle2 is equal to n-1, where n represents the total number of distributed feedback laser chip bars. If yes, return to step S1; otherwise, set the switch switching flag sweep_flag1 and the stepper motor displacement flag sweep_flag2 to "1" to start channel switching and motor displacement. S5: The switch switching control unit increments the switch control sequence signal by 1, turns on the channel switch of the corresponding distributed feedback laser chip bar, and sets the switch switching flag sweep_flag1 to "0"; S6: The controllable stepper motor drive control unit drives the motor to move to the next target channel position. After the controllable stepper motor is in position, the conversion flag shift_flag is set to "1" and the stepper motor displacement flag sweep_flag2 is set to "0". After detecting the rising edge of the conversion flag shift_flag, the start flag start_flag for starting the power-on sweep operation is set to "1" again, the conversion flag shift_flag is set to "0", the next set of power-on data is sent, and the process returns to step S3.

[0039] Through the above process, the system achieves coordinated control of the photonic chip and the stepper motor, sequentially completing the driving and output coupling of all channels, and finally realizing high-bandwidth, high-power linear frequency sweep.

[0040] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0041] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning, characterized in that, include: Parallel architecture photonic integrated chip arrays are used to emit optical signals of different wavelengths; A tunable optical path coupled spherical lens fiber optic module is coupled to the output channel of a parallel architecture photonic integrated chip array for transmitting optical signals; A controllable stepper motor is used to drive the linear movement of the tunable optical path coupled spherical lens fiber optic module, thereby coupling the tunable optical path coupled spherical lens fiber optic module with different output channels of the parallel architecture photonic integrated chip array. The optoelectronic fusion collaborative control module is used to convert the stored power-on data into drive current according to the preset timing sequence, and drive the parallel architecture photonic integrated chip array to perform linear frequency sweep; it is also used to control the drive current of the controllable stepper motor in real time.

2. The parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning as described in claim 1, characterized in that, The parallel architecture photonic integrated chip array is composed of n distributed feedback laser chip bars connected in parallel in an n×1 array. The distributed feedback laser chip bars are arranged at equal intervals, and the center wavelength interval of each distributed feedback laser chip bar is kept consistent. The distributed feedback laser chip bars are fabricated using REC technology.

3. The parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning as described in claim 1, characterized in that, The tunable optical path coupled spherical lens fiber module includes a spherical lens fiber, a mode converter, and a single-mode fiber. The spherical lens fiber is fixed on a controllable stepper motor. The controllable stepper motor drives the spherical lens fiber to align with different output channels of the parallel architecture photonic integrated chip array. The optical signal coupled into the spherical lens fiber is converted into a mode by a mode converter, which converts the multiple higher-order modes contained in the multimode optical field into the fundamental mode and then inputs it into the single-mode fiber. The end face of the optical fiber of the spherical lens is a semi-circular spherical structure.

4. The parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning as described in claim 1, characterized in that, The controllable stepper motor is a linear motor, and its slider is guided and supported by double guide rails; the controllable stepper motor adjusts its movement speed according to the received real-time drive current.

5. The parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning as described in claim 2, characterized in that, The optoelectronic fusion collaborative control module includes a main control unit, a photonic integrated chip array drive control unit, and a switch switching control unit; The main control unit outputs chip drive current data to the photonic integrated chip array drive control unit. The output terminal of the photonic integrated chip array drive control unit is connected to the current signal input terminal of the switch switching control unit. The main control unit sends digital gating signals to the switch selection signal input terminal of the switch switching control unit. The multiple output ports of the switch switching control unit are connected to different distributed feedback laser chip bars. The switch switching control unit turns on the corresponding channel according to the digital gating signal, so that the drive current is applied to the corresponding distributed feedback laser chip bar. By sending digital gating signals in sequence through the main control unit, the sequential gating and power-on of each distributed feedback laser chip bar is realized, thereby completing the sequential frequency sweep.

6. The parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning as described in claim 5, characterized in that, The optoelectronic fusion collaborative control module also includes a temperature control unit. The parallel architecture photonic integrated chip array is internally packaged with a thermistor and a TEC. The temperature control unit receives the set temperature voltage value sent by the main control unit, and simultaneously collects the measured chip temperature voltage value across the thermistor. Then, it calculates the difference between the set temperature voltage value and the measured chip temperature voltage value, and sends the difference to the main control unit. The main control unit adjusts the output TEC drive current data according to the difference, thereby changing the internal ambient temperature of the parallel architecture photonic integrated chip array.

7. The parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning as described in claim 5, characterized in that, The optoelectronic fusion collaborative control module also includes a controllable stepper motor drive control unit. The main control unit uses a PID control mechanism to control the motor drive current data input to the controllable stepper motor drive control unit in real time. The controllable stepper motor drive control unit outputs the motor drive current to adjust the movement speed of the controllable stepper motor, so that the tunable optical path coupled spherical lens fiber optic module is aligned with the output end of the required distributed feedback laser chip bar.

8. The parallel architecture photonic integrated chip array control system based on controllable stepper motor tuning as described in claim 5, characterized in that, The optoelectronic fusion collaborative control module also includes a feedback control unit, which includes a first-stage beam splitter, a second-stage beam splitter, a wavelength locker, and a photodetector. The first-stage beam splitter splits the optical signal output from the tunable optical path coupled spherical lens fiber module into two paths, one for outputting the optical signal and the other for connecting to the second-stage beam splitter. The second-stage beam splitter further splits the optical signal into beams at a 1:1 ratio, which are then sent to the wavelength locker and the photodetector, respectively. The wavelength locker is used to detect the deviation between the actual output wavelength and the target wavelength, and feeds the wavelength difference back to the main control unit, thereby dynamically adjusting the power-on parameters of the parallel architecture photonic integrated chip array, and thus controlling the output wavelength. The photodetector monitors the output optical power in real time and feeds it back to the main control unit to fine-tune the displacement control signal of the controllable stepper motor, thereby controlling the output optical power.

9. A control method for a parallel architecture photonic integrated chip array based on controllable stepper motor tuning, characterized in that, Includes the following steps: S1: All parameters are set to zero, and the controllable stepper motor is positioned at the output channel of the first distributed feedback laser chip bar. S2: Turn on the channel switch of the first distributed feedback laser chip bar and start the power-on frequency sweep operation by setting the start_flag directly to "1"; S3: Sequentially read and send power-on data, perform frequency sweep on the currently connected distributed feedback laser chip bar, and increment the address pointer and the current power-on data sequence number cycle1 by 1 for each power-on data read. When cycle1 reaches the first threshold, it indicates that the frequency sweep of the current distributed feedback laser chip bar is completed, the laser chip bar sequence number cycle2 is incremented by 1, and the start_flag flag for starting the power-on frequency sweep operation is set to "0". S4: Determine whether the laser chip bar number cycle2 is equal to n-1, where n represents the total number of distributed feedback laser chip bars. If yes, return to step S1; otherwise, set the switch switching flag sweep_flag1 and the stepper motor displacement flag sweep_flag2 to "1" to start channel switching and motor displacement. S5: The switch switching control unit increments the switch control sequence signal by 1, turns on the channel switch of the corresponding distributed feedback laser chip bar, and sets the switch switching flag sweep_flag1 to "0"; S6: The controllable stepper motor drive control unit drives the motor to move to the next target channel position. After the controllable stepper motor is in position, the conversion flag shift_flag is set to "1" and the stepper motor displacement flag sweep_flag2 is set to "0". After detecting the rising edge of the conversion flag shift_flag, the start flag start_flag for starting the power-on sweep operation is set to "1" again, the conversion flag shift_flag is set to "0", and the next set of power-on data is sent. Then, the process returns to step S3.

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