Nonlinear effect suppression method and device of optical fiber fuse, medium and equipment

Abstract

The invention discloses a nonlinear effect suppression method and device of an optical fiber fuse, a medium and equipment, and belongs to the field of nonlinear effect suppression of optical fiber fuses. The continuous optical signals generated by the high-power laser source are preprocessed and then input into the single-mode optical fiber link, and the output optical power is monitored in real time by the optical power meter. And when it is monitored that the optical power drops sharply and meets a preset condition, the system confirms the occurrence of an optical fiber fuse phenomenon, and then the continuous optical signal is converted into a pulse optical signal. By adjusting the period of the pulsed light signal, the system can determine the minimum pulse period threshold for terminating the fuse phenomenon. Finally, the output of the pulse optical signal is controlled according to the minimum pulse period threshold, and the nonlinear effect in a single-mode optical fiber link is effectively suppressed, so that the stability and reliability of an optical fiber communication system are enhanced, and the problem that the nonlinear effect of a single-mode optical fiber fuse cannot be effectively suppressed in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of suppressing the nonlinear effects of fiber fuse, and particularly to a method, device, medium and equipment for suppressing the nonlinear effects of fiber fuse. Background Art

[0002] In the field of optical fiber communication, single-mode fiber (SMF) is widely used in high-speed data transmission due to its low dispersion characteristics. However, with the increase of transmission power, the fuse phenomenon and nonlinear effects that may occur in SMF become key problems restricting system performance. The existing technologies face the following challenges when dealing with these problems:

[0003] Detection and response of the fuse phenomenon: Existing systems often lack effective real-time monitoring means to quickly identify the occurrence of fiber fuse, resulting in the inability to take timely measures to prevent further damage.

[0004] Suppression of nonlinear effects: Nonlinear effects in optical fibers, such as stimulated Raman scattering and stimulated Brillouin scattering, will reduce the signal quality and increase the bit error rate. Current methods may require complex optical components or electronic devices when suppressing these effects, increasing the cost and complexity of the system.

[0005] Conversion between continuous light and pulsed light: Traditional continuous light input may cause damage to the optical fiber, and converting continuous light into pulsed light can reduce the fuse risk, but existing conversion methods may not be efficient or accurate enough.

[0006] System stability and reliability: Due to the existence of the fuse phenomenon and nonlinear effects, the system may require more frequent maintenance and calibration, which affects the stability and reliability of the system.

[0007] Cost and energy efficiency: To solve the above problems, existing technologies may require additional optical and electronic components, which not only increases the complexity of the system, but also raises the cost and energy consumption.

[0008] These deficiencies lead to the inability of existing technologies to effectively suppress the nonlinear effects of single-mode fiber fuse. Summary of the Invention

[0009] The present invention provides a method, device, medium and equipment for suppressing the nonlinear effects of fiber fuse to solve the problem that the nonlinear effects of single-mode fiber fuse cannot be effectively suppressed in the existing technology.

[0010] In a first aspect, the present application provides a method for suppressing the nonlinear effects of fiber fuse, including:

[0011] Obtaining a continuous light signal according to a preset high-power laser source;

[0012] Preprocess the continuous optical signal and input it into a preset single-mode fiber optic link;

[0013] According to a preset optical power meter, monitor the output optical power of the single-mode fiber optic link in real time;

[0014] If it is monitored that the output optical power meets the preset conditions, confirm that a fiber fuse phenomenon has occurred, convert the continuous optical signal into a pulsed optical signal, and obtain the minimum pulse period threshold for terminating the fiber fuse phenomenon by adjusting the period of the pulsed optical signal;

[0015] Control the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode fiber optic link.

[0016] This application uses a high-power laser source to obtain a continuous optical signal and ensures that the signal is suitable for single-mode fiber transmission through preprocessing. Then, the output optical power of the fiber optic link is monitored in real time by an optical power meter. Once it is detected that the optical power drops sharply or remains below the preset threshold, the system determines that a fiber fuse phenomenon has occurred. At this time, the system converts the continuous optical signal into a pulsed optical signal and finds the minimum pulse period threshold that can terminate the fuse phenomenon by adjusting the pulse period. Finally, based on this minimum pulse period threshold, the output of the pulsed optical signal is controlled to suppress the nonlinear effect of the fiber optic link. This method can not only detect and respond to the fiber fuse phenomenon in a timely manner, reducing damage to the fiber optic link, but also optimize the transmission performance of the fiber by accurately controlling the period of the optical signal. This application solves the problem that the prior art cannot effectively suppress the nonlinear effect of single-mode fiber fuses.

[0017] As a preferred embodiment of the first aspect, the preprocessing of the continuous optical signal specifically includes:

[0018] Adjust the frequency of the continuous optical signal according to a preset band-pass filter, and adjust the intensity of the continuous optical signal according to a preset acousto-optic modulator so that the continuous optical signal can be transmitted in the single-mode fiber optic link.

[0019] In this preferred embodiment, the present application uses a band-pass filter to adjust the frequency of the continuous optical signal to ensure that the frequency components of the optical signal are suitable for the transmission characteristics of the single-mode optical fiber. This can reduce the attenuation and dispersion of the signal during transmission, and improve the transmission distance and fidelity of the signal. Secondly, an acousto-optic modulator is used to precisely control the intensity of the optical signal to match the input power requirements of the optical fiber link. This helps to avoid non-linear effects or optical fiber fusing phenomena caused by excessive power, and at the same time ensures the stability and reliability of the signal. Through such preprocessing steps, the continuous optical signal can be made more suitable for transmission in the single-mode optical fiber, thereby improving the performance of the entire optical fiber communication system, including increasing the transmission rate of the signal, increasing the transmission distance, reducing the bit error rate, and enhancing the adaptability of the system to different operating conditions. These optimization measures work together to enable the optical fiber communication system to operate with higher efficiency and reliability, meeting the requirements of modern high-speed data transmission.

[0020] As a preferred embodiment of the first aspect, if it is monitored that the output optical power meets the preset conditions, it is confirmed that an optical fiber fusing phenomenon has occurred. Specifically:

[0021] According to the optically monitored power in real time, calculate the power drop rate per unit time;

[0022] When the power drop rate is greater than a preset first threshold within a preset time, it is confirmed that an optical fiber fusing phenomenon has occurred.

[0023] In this preferred embodiment, the present application can calculate the power drop rate per unit time by monitoring the output optical power of the optical fiber link in real time. This real-time monitoring mechanism provides a basis for quickly identifying optical fiber fusing. When the power drop rate exceeds the preset first threshold within a preset extremely short time, the system immediately confirms that an optical fiber fusing phenomenon has occurred. This determination method not only improves the response speed to the optical fiber fusing phenomenon, but also increases the recognition accuracy by setting a specific power drop rate threshold, avoiding false alarms and missed alarms. Therefore, this method can quickly respond when an optical fiber fusing phenomenon occurs, promptly convert the optical signal form, adjust the pulse period, thereby suppressing non-linear effects, protecting the optical fiber link from further damage, ensuring the stability and reliability of the optical fiber communication system, and ultimately achieving safer and more efficient optical fiber data transmission.

[0024] As a preferred embodiment of the first aspect, if it is monitored that the output optical power meets the preset conditions, it is confirmed that an optical fiber fusing phenomenon has occurred. Specifically:

[0025] According to the theoretical model of the critical power and temperature preset, calculate the critical optical power for triggering fusing;

[0026] When the monitored optical power exceeds the critical optical power and it is detected that the optical power drops to a preset second threshold, it is confirmed that a fiber fuse phenomenon has occurred.

[0027] According to the theoretical model of the preset critical power and temperature, calculate the critical optical power for triggering the fuse, specifically:

[0028] The preset theoretical model of critical power and temperature is:

[0029]

[0030] In the formula, P c is the critical optical power for triggering the fuse, T c is the temperature required to reach the trigger fuse reaction, k B is the Boltzmann constant, u0 is the activation energy related to the trigger mechanism, and γ is a constant.

[0031] In this preferred embodiment, the present application can calculate the critical optical power for triggering the fiber fuse by using the theoretical model of critical power and temperature. This model takes into account the relationship between local temperature and optical power density, thus providing a predictable threshold for fiber fusing. Then, when the monitored optical power exceeds this critical optical power and subsequently it is detected that the optical power drops sharply to a preset second threshold, the system can confirm that a fiber fuse phenomenon has occurred. This method not only improves the accuracy of identifying the fiber fuse phenomenon, but also enables the system to take preventive measures before the fuse occurs, such as adjusting the optical power or changing the optical pulse period, so as to suppress the nonlinear effect, protect the optical fiber from damage, and enhance the stability and reliability of the optical fiber communication system. Therefore, the present application provides an innovative method for detecting fiber fuse phenomena and suppressing nonlinear effects by combining theoretical analysis and real-time monitoring, which is of great significance for improving the performance of optical fiber communication systems.

[0032] As a preferred embodiment of the first aspect, the method of converting the continuous optical signal into a pulsed optical signal and obtaining the minimum pulse period threshold for terminating the fiber fuse phenomenon by adjusting the period of the pulsed optical signal is specifically as follows:

[0033] If a fiber fuse phenomenon is monitored, convert the continuous optical signal into a rectangular optical pulse according to a preset waveform generator;

[0034] Adjust the period of the rectangular optical pulse and monitor the change in the output optical power of the single-mode fiber link in real time;

[0035] If it is monitored that the value of the output optical power remains unchanged or increases, confirm that the fiber fuse phenomenon has been terminated, and use the pulse period of the rectangular optical pulse when the fiber fuse phenomenon has been terminated as the minimum pulse period threshold.

[0036] In this preferred embodiment, when the present application detects a fiber fuse phenomenon, the system converts the continuous optical signal into rectangular optical pulses according to a preset waveform generator. This conversion helps to reduce the energy concentration in the optical fiber, thereby reducing the fuse risk. Subsequently, by adjusting the period of the rectangular optical pulses and monitoring the change in the output optical power of the single-mode optical fiber link in real time, the system can dynamically find the pulse period that is most suitable for suppressing the fuse phenomenon. When it is detected that the output optical power is stable or increasing, it indicates that the fiber fuse phenomenon has been effectively terminated. At this time, the recorded pulse period is the minimum pulse period threshold. This method can not only respond to the fiber fuse phenomenon in a timely manner, but also optimize the transmission performance of the optical fiber by precisely controlling the pulse period, thereby improving the stability and reliability of the optical fiber communication system and achieving safer and more efficient data transmission.

[0037] As a preferred embodiment of the first aspect, after controlling the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode optical fiber link, it further includes:

[0038] Transmitting the pulsed optical signal after suppressing the nonlinear effect to a preset photovoltaic cell device, so that the photovoltaic cell device converts the received pulsed optical signal into electrical energy and supplies power to the load device.

[0039] In this preferred embodiment, the present application controls the output of the pulsed optical signal according to the minimum pulse period threshold. This method can precisely manage the energy distribution in the optical fiber, thereby reducing the impact of the nonlinear effect on signal integrity. Subsequently, the pulsed optical signal after suppressing the nonlinear effect is transmitted to a preset photovoltaic cell device, which can convert the received pulsed optical signal into electrical energy. This conversion process not only improves the energy conversion efficiency, but also ensures the stable supply of electrical energy. Finally, the converted electrical energy is used to supply power to the load device. This not only improves the reliability of the optical fiber communication system, but also expands its application in energy supply, realizing the dual functions of optical fiber communication and energy transmission, and providing higher practical value and flexibility for the application of the optical fiber system.

[0040] In a second aspect, the present application provides a device for suppressing the nonlinear effect of fiber fuse. The device for suppressing the nonlinear effect of fiber fuse includes an acquisition module, a preprocessing module, a monitoring module, a signal conversion module, and a control module;

[0041] The acquisition module is used to acquire a continuous optical signal according to a preset high-power laser source;

[0042] The preprocessing module is used to preprocess the continuous optical signal and input it into a preset single-mode optical fiber link;

[0043] The monitoring module is used to monitor the output optical power of the single-mode fiber optic link in real time according to a preset optical power meter;

[0044] The signal conversion module is used to confirm that a fiber fuse phenomenon occurs if it is monitored that the output optical power meets a preset condition, convert the continuous optical signal into a pulsed optical signal, and obtain the minimum pulse period threshold for terminating the fiber fuse phenomenon by adjusting the period of the pulsed optical signal;

[0045] The control module is used to control the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode fiber optic link.

[0046] The device uses five modules to work in division of labor and coordination, which can more effectively suppress the nonlinear effect of the single-mode fiber optic link. This application uses a high-power laser source to obtain a continuous optical signal and ensures that the signal is suitable for single-mode fiber transmission through preprocessing. Then, the output optical power of the fiber optic link is monitored in real time by an optical power meter. Once it is detected that the optical power drops sharply or remains below a preset threshold, the system determines that a fiber fuse phenomenon has occurred. At this time, the system converts the continuous optical signal into a pulsed optical signal and adjusts the pulse period to find the minimum pulse period threshold that can terminate the fuse phenomenon. Finally, based on this minimum pulse period threshold, the output of the pulsed optical signal is controlled to suppress the nonlinear effect of the fiber optic link. This method can not only detect and respond to the fiber fuse phenomenon in time, reduce the damage to the fiber optic link, but also optimize the transmission performance of the fiber by accurately controlling the period of the optical signal. This application solves the problem that the prior art cannot effectively suppress the nonlinear effect of single-mode fiber fuses.

[0047] In a third aspect, this application provides a computer-readable storage medium, which includes a stored computer program. When the computer program runs, it controls the device where the computer-readable storage medium is located to execute the method for suppressing the nonlinear effect of a fiber fuse as described above. Its beneficial effects are the same as those of the method for suppressing the nonlinear effect of a fiber fuse provided in the first aspect of this application.

[0048] In a fourth aspect, this application provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements any one of the methods for suppressing the nonlinear effect of a fiber fuse as described in the first aspect. Description of the Drawings

[0049] Figure 1 : It is a schematic flowchart of an embodiment of the method for suppressing the nonlinear effect of a fiber fuse provided by this application;

[0050] Figure 2: Schematic structural diagram of an embodiment of the optical fiber transmission framework for monitoring the nonlinear effect of optical fiber provided in this application;

[0051] Figure 3 : Schematic structural diagram of an embodiment of the device for suppressing the nonlinear effect of optical fiber fuse provided in this application. Detailed implementation manners

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0053] Embodiment 1

[0054] Please refer to Figure 1 , to solve the problem that the prior art cannot effectively suppress the nonlinear effect of single-mode optical fiber fuse, an embodiment of the present invention provides a method for suppressing the nonlinear effect of optical fiber fuse.

[0055] In this embodiment, the process of the method for suppressing the nonlinear effect of optical fiber fuse in this application is described in detail through steps S01 - S05.

[0056] The optical fiber transmission framework for monitoring the nonlinear effect of optical fiber in this application is as Figure 2 shown, and it includes a high-power laser source, a band-pass filter, an acousto-optic modulator, a waveform generator, a single-mode optical fiber, an optical power meter, a photovoltaic cell, and a load.

[0057] S01: Obtain a continuous optical signal according to a preset high-power laser source.

[0058] S02: Preprocess the continuous optical signal and input it into a preset single-mode optical fiber link.

[0059] As a preferred embodiment of Embodiment 1, the preprocessing of the continuous optical signal specifically is:

[0060] The high-energy signal light enters the single-mode optical fiber link through the band-pass filter and the acousto-optic modulator. According to the band-pass filter, the frequency of the continuous optical signal is adjusted, and according to the acousto-optic modulator, the intensity of the continuous optical signal is adjusted, so that the continuous optical signal can be transmitted in the single-mode optical fiber link.

[0061] In this preferred embodiment, the present application uses a band-pass filter to adjust the frequency of the continuous optical signal to ensure that the frequency components of the optical signal are suitable for the transmission characteristics of the single-mode optical fiber. This can reduce the attenuation and dispersion of the signal during transmission, and improve the transmission distance and fidelity of the signal. Secondly, an acousto-optic modulator is used to precisely control the intensity of the optical signal to match the input power requirements of the optical fiber link, which helps to avoid non-linear effects or optical fiber fusing caused by excessive power, and at the same time ensures the stability and reliability of the signal. Through such preprocessing steps, the continuous optical signal can be made more suitable for transmission in the single-mode optical fiber, thereby improving the performance of the entire optical fiber communication system, including increasing the transmission rate of the signal, increasing the transmission distance, reducing the bit error rate, and enhancing the adaptability of the system to different operating conditions. These optimization measures work together to enable the optical fiber communication system to operate with higher efficiency and reliability, meeting the requirements of modern high-speed data transmission.

[0062] S03: According to a preset optical power meter, the output optical power of the single-mode optical fiber link is monitored in real time.

[0063] As a preferred embodiment of Embodiment 1, the optical power meter is located at the receiving end and is used to monitor the output optical power of the single-mode optical fiber link in real time.

[0064] S04: If it is monitored that the output optical power meets the preset conditions, it is confirmed that an optical fiber fusing phenomenon has occurred, the continuous optical signal is converted into a pulsed optical signal, and by adjusting the period of the pulsed optical signal, the minimum pulse period threshold for terminating the optical fiber fusing phenomenon is obtained.

[0065] As a preferred embodiment of Embodiment 1, the "if it is monitored that the output optical power meets the preset conditions, it is confirmed that an optical fiber fusing phenomenon has occurred" is specifically:

[0066] Under high-power transmission conditions, the optical fiber fusing phenomenon will cause rapid damage to a local area of the optical fiber, thereby causing a sharp drop in the optical power in the link. Whether an optical fiber fusing phenomenon has occurred is judged by detecting the change in optical power according to the preset conditions.

[0067] 1. Power sudden drop rate determination:

[0068] Optical power data can be continuously collected, and the power drop rate per unit time can be calculated. If within a very short time (such as a few hundred milliseconds or less), the power drop amplitude exceeds a preset threshold, it may indicate that a fusing phenomenon has occurred. A simple determination formula is:

[0069]

[0070] where ΔP is the optical power drop within the time interval Δt, and is a threshold calibrated according to experimental data (such as a few dB / ms).

[0071] In this preferred embodiment, the present application monitors the output optical power of the optical fiber link in real time, and the system can calculate the power drop rate per unit time. This real-time monitoring mechanism provides a basis for quickly identifying optical fiber fuses. When the power drop rate exceeds a preset first threshold within a preset extremely short time, the system confirms that an optical fiber fuse phenomenon has occurred. This determination method not only improves the response speed to the optical fiber fuse phenomenon, but also increases the recognition accuracy by setting a specific power drop rate threshold, avoiding false alarms and missed alarms. Therefore, this method can quickly respond when the optical fiber fuse phenomenon occurs, timely convert the optical signal form, adjust the pulse period, thereby suppressing the nonlinear effect, protecting the optical fiber link from further damage, ensuring the stability and reliability of the optical fiber communication system, and ultimately achieving safer and more efficient optical fiber data transmission.

[0072] 2. Theoretical model based on critical power and temperature:

[0073] Some studies have proposed the relationship between the fuse triggering conditions and local temperature and optical power density. A common model gives the following relationship:

[0074]

[0075] Where: P c is the critical optical power for triggering the fuse (the power actually acting on the core of the optical fiber), T c is the critical temperature (i.e., the temperature required to trigger the fuse reaction), k B is the Boltzmann constant, u0 is the activation energy related to the triggering mechanism (such as the energy related to the diffusion of trace oxygen), and γ is a constant.

[0076] In addition, if the effective mode field area Aeff of the optical fiber is known (for example, for a standard single-mode optical fiber, it is about 50 μm2, that is, about 5×10 -7 cm 2 , the product of the critical optical power density I c (for example, about 11 MW / cm 2 ) and Aeff gives the critical power:

[0077] P c = I c × A eff

[0078] In this example, P c ≈ 1×10 6 W / cm 2 × 5×10 -7 cm 2 ≈ 0.5W.

[0079] In this preferred embodiment, the present application utilizes the theoretical model of critical power and temperature to calculate the critical optical power for triggering fiber fuse. This model takes into account the relationship between local temperature and optical power density, thereby providing a predictable threshold for fiber fuse. Then, when the monitored optical power exceeds this critical optical power and subsequently the optical power is detected to drop sharply to a preset second threshold, the system can confirm that a fiber fuse phenomenon has occurred. This method not only improves the accuracy of identifying the fiber fuse phenomenon, but also enables the system to take preventive measures before the fuse occurs, such as adjusting the optical power or changing the optical pulse period, so as to suppress the nonlinear effect, protect the fiber from damage, and enhance the stability and reliability of the fiber optic communication system.

[0080] As a preferred embodiment of Embodiment 1, the conversion of the continuous optical signal into a pulsed optical signal and obtaining the minimum pulse period threshold for terminating the fiber fuse phenomenon by adjusting the period of the pulsed optical signal are specifically as follows:

[0081] When the single-mode fiber fuse phenomenon occurs, immediately turn on the output of the waveform generator to convert the input continuous light into rectangular optical pulses. At this time, record the time t = t1. By changing the pulse period, observe whether the fiber fuse terminates. If the fuse phenomenon terminates at this time, obtain the minimum pulse period T. The minimum pulse period T under different average input powers of the laser source can be recorded to obtain the curve of the minimum pulse period versus the average input optical power.

[0082] In this preferred embodiment, when the present application monitors the fiber fuse phenomenon, the system converts the continuous optical signal into rectangular optical pulses according to the preset waveform generator. This conversion helps to reduce the energy concentration in the fiber, thereby reducing the fuse risk. Subsequently, by adjusting the period of the rectangular optical pulses and monitoring the change of the output optical power of the single-mode fiber link in real time, the system can dynamically find the pulse period most suitable for suppressing the fuse phenomenon. When it is monitored that the output optical power is stable or rising, it indicates that the fiber fuse phenomenon has been effectively terminated. The pulse period recorded at this time is the minimum pulse period threshold. This method can not only respond to the fiber fuse phenomenon in a timely manner, but also optimize the transmission performance of the fiber by precisely controlling the pulse period, thereby improving the stability and reliability of the fiber optic communication system and achieving safer and more efficient data transmission.

[0083] S05: Control the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode fiber link.

[0084] As a preferred embodiment of Embodiment 1, after controlling the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode fiber link, it further includes:

[0085] The pulse light signal processed to suppress nonlinear effects is transmitted to a preset photovoltaic cell device, so that the photovoltaic cell device converts the received pulse light signal into electrical energy and then supplies power to the load device.

[0086] In this preferred embodiment, the present application controls the output of the pulsed light signal according to the minimum pulse period threshold. This method can accurately manage the energy distribution in the optical fiber, thereby reducing the impact of nonlinear effects on signal integrity. Subsequently, the pulsed light signal that has undergone nonlinear effect suppression processing is transmitted to a preset photovoltaic cell device, which can convert the received pulsed light signal into electrical energy. This conversion process not only improves the energy conversion efficiency, but also ensures a stable supply of electrical energy. Ultimately, the converted electrical energy is used to power the load device, which not only improves the reliability of the optical fiber communication system, but also expands its application in energy supply, realizes the dual functions of optical fiber communication and energy transmission, and provides higher practical value and flexibility for the application of optical fiber systems.

[0087] The present application utilizes a high-power laser source to obtain a continuous optical signal, and ensures that the signal is suitable for single-mode optical fiber transmission through preprocessing. Then, the output optical power of the optical fiber link is monitored in real time by an optical power meter. Once it is detected that the optical power drops sharply or is continuously lower than the preset threshold, the system determines that a fiber fuse phenomenon has occurred. At this time, the system converts the continuous optical signal into a pulsed optical signal, and by adjusting the pulse period, finds the minimum pulse period threshold that can terminate the fuse phenomenon. Finally, the output of the pulsed optical signal is controlled based on this minimum pulse period threshold, thereby suppressing the nonlinear effect of the optical fiber link. This method can not only detect and respond to the optical fiber fuse phenomenon in a timely manner and reduce damage to the optical fiber link, but also optimize the transmission performance of the optical fiber by accurately controlling the period of the optical signal. The present application solves the problem that the existing technology cannot effectively suppress the nonlinear effect of single-mode optical fiber fuses.

[0088] Example 2

[0089] Please refer to Figure 3 , which is a nonlinear effect suppression device for optical fiber fuses provided in an embodiment of the present application.

[0090] In this embodiment, the nonlinear effect suppression device for optical fiber fuses includes an acquisition module 10 , a preprocessing module 20 , a monitoring module 30 , a signal conversion module 40 and a control module 50 .

[0091] The optical fiber transmission framework for monitoring optical fiber nonlinear effects of this application is as follows Figure 2 As shown, the optical fiber includes a high-power laser source, a bandpass filter, an acousto-optic modulator, a waveform generator, a single-mode optical fiber, an optical power meter, a photovoltaic cell, and a load.

[0092] The acquisition module 10 is used to acquire a continuous optical signal according to a preset high-power laser source.

[0093] The preprocessing module 20 is used to preprocess the continuous optical signal and input it into a preset single-mode optical fiber link.

[0094] As a preferred embodiment of the second embodiment, the preprocessing of the continuous optical signal specifically includes:

[0095] The high-energy signal light enters the single-mode optical fiber link through a band-pass filter and an acousto-optic modulator. According to the band-pass filter, the frequency of the continuous optical signal is adjusted, and according to the acousto-optic modulator, the intensity of the continuous optical signal is adjusted, so that the continuous optical signal can be transmitted in the single-mode optical fiber link.

[0096] In this preferred embodiment, the present application uses a band-pass filter to adjust the frequency of the continuous optical signal to ensure that the frequency components of the optical signal are suitable for the transmission characteristics of the single-mode optical fiber. This can reduce the attenuation and dispersion of the signal during transmission, improve the transmission distance and fidelity of the signal. Secondly, an acousto-optic modulator is used to precisely control the intensity of the optical signal to match the input power requirements of the optical fiber link, which helps to avoid nonlinear effects or optical fiber fusing phenomena caused by excessive power, and at the same time ensures the stability and reliability of the signal. Through such preprocessing steps, the continuous optical signal can be made more suitable for transmission in the single-mode optical fiber, thereby improving the performance of the entire optical fiber communication system, including increasing the transmission rate of the signal, increasing the transmission distance, reducing the bit error rate, and enhancing the adaptability of the system to different operating conditions. These optimization measures work together to enable the optical fiber communication system to operate with higher efficiency and reliability, meeting the requirements of modern high-speed data transmission.

[0097] The monitoring module 30 is used to monitor the output optical power of the single-mode optical fiber link in real time according to a preset optical power meter.

[0098] As a preferred embodiment of the second embodiment, the optical power meter is located at the receiving end and is used to monitor the output optical power of the single-mode optical fiber link in real time.

[0099] The signal conversion module 40 is used to confirm the occurrence of an optical fiber fusing phenomenon if it is monitored that the output optical power meets the preset conditions, convert the continuous optical signal into a pulsed optical signal, and obtain the minimum pulse period threshold for terminating the optical fiber fusing phenomenon by adjusting the period of the pulsed optical signal.

[0100] As a preferred embodiment of the second embodiment, the confirmation of the occurrence of the optical fiber fusing phenomenon if it is monitored that the output optical power meets the preset conditions specifically includes:

[0101] Under high - power transmission conditions, the fiber fuse phenomenon can cause rapid damage to a local area of the optical fiber, leading to a sharp drop in the optical power in the link. Whether the fiber fuse phenomenon occurs is judged by detecting the change in optical power according to preset conditions.

[0102] 1. Power sudden - drop rate determination:

[0103] Optical power data can be continuously collected, and the power drop rate per unit time can be calculated. If the power drops by more than a preset threshold within a very short time (such as a few hundred milliseconds or less), it may indicate that the fuse phenomenon has occurred. A simple determination formula is:

[0104]

[0105] where ΔP is the optical - power drop within the time interval Δt, and is the threshold calibrated according to experimental data (such as a few dB / ms).

[0106] In this preferred embodiment, by continuously monitoring the output optical power of the optical - fiber link, the system can calculate the power drop rate per unit time. This real - time monitoring mechanism provides a basis for quickly identifying fiber fuses. When the power drop rate exceeds a preset first threshold within a preset extremely short time, the system confirms that the fiber fuse phenomenon has occurred. This determination method not only improves the response speed to the fiber fuse phenomenon but also increases the recognition accuracy by setting a specific power drop rate threshold, avoiding false alarms and missed alarms. Therefore, this method can quickly respond when the fiber fuse phenomenon occurs, promptly convert the optical - signal form, adjust the pulse period, thereby suppressing the nonlinear effect, protecting the optical - fiber link from further damage, ensuring the stability and reliability of the optical - fiber communication system, and ultimately achieving safer and more efficient optical - fiber data transmission.

[0107] 2. Theoretical model based on critical power and temperature:

[0108] Some studies have proposed the relationship between the fuse - triggering conditions and local temperature and optical - power density. A common model gives the following relationship:

[0109]

[0110] where: P c is the critical optical power for triggering the fuse (the power actually acting on the fiber core), T c is the critical temperature (i.e., the temperature required to trigger the fuse reaction), k B is the Boltzmann constant, u0 is the activation energy related to the triggering mechanism (such as the energy related to trace - oxygen diffusion), and γ is a constant.

[0111] In addition, if the effective mode field area Aeff of the optical fiber is known (for example, about 50 μm2 for standard single-mode optical fiber, i.e., about 5×10 -7 cm 2 , the product of the critical optical power density I c (for example, about 11 MW / cm 2 ) and Aeff gives the critical power:

[0112] P c = I c × A eff

[0113] In this example, P c ≈ 1×10 6 W / cm 2 × 5×10 -7 cm 2 ≈ 0.5 W.

[0114] In this preferred embodiment, the present application utilizes the theoretical model of the critical power and temperature to calculate the critical optical power for triggering optical fiber fuse. This model takes into account the relationship between the local temperature and the optical power density, thereby providing a predictable threshold for optical fiber fuse. Then, when the monitored optical power exceeds this critical optical power and subsequently the optical power is detected to drop sharply to a preset second threshold, the system can confirm that the optical fiber fuse phenomenon has occurred. This method not only improves the accuracy of identifying the optical fiber fuse phenomenon, but also enables the system to take preventive measures before the fuse occurs, such as adjusting the optical power or changing the optical pulse period, so as to suppress the nonlinear effect, protect the optical fiber from damage, and enhance the stability and reliability of the optical fiber communication system.

[0115] As a preferred embodiment of the second embodiment, the conversion of the continuous optical signal into a pulsed optical signal and the adjustment of the period of the pulsed optical signal to obtain the minimum pulse period threshold for terminating the optical fiber fuse phenomenon are specifically as follows:

[0116] When the single-mode optical fiber fuse phenomenon occurs, immediately turn on the output of the waveform generator to convert the input continuous light into rectangular optical pulses. At this time, record the time t = t1. By changing the pulse period, observe whether the optical fiber fuse terminates. If the fuse phenomenon terminates at this time, the minimum pulse period T can be obtained. The minimum pulse period T can be recorded at different average input powers of the laser source to obtain the curve of the minimum pulse period versus the average input optical power.

[0117] In this preferred embodiment, when the present application detects a fiber fuse phenomenon, the system converts a continuous optical signal into rectangular optical pulses according to a preset waveform generator. This conversion helps reduce the energy concentration in the optical fiber, thereby reducing the fuse risk. Subsequently, by adjusting the period of the rectangular optical pulses and monitoring the change in the output optical power of the single-mode optical fiber link in real time, the system can dynamically find the pulse period that is most suitable for suppressing the fuse phenomenon. When it is detected that the output optical power is stable or increasing, it indicates that the fiber fuse phenomenon has been effectively terminated. At this time, the recorded pulse period is the minimum pulse period threshold. This method can not only respond to the fiber fuse phenomenon in a timely manner but also optimize the transmission performance of the optical fiber by precisely controlling the pulse period, thereby improving the stability and reliability of the optical fiber communication system and achieving safer and more efficient data transmission.

[0118] The control module 50 is used to control the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode optical fiber link.

[0119] As a preferred embodiment of the second embodiment, after controlling the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode optical fiber link, it further includes:

[0120] Transmitting the pulsed optical signal after suppressing the nonlinear effect to a preset photovoltaic cell device, so that the photovoltaic cell device converts the received pulsed optical signal into electrical energy and supplies power to the load device.

[0121] In this preferred embodiment, the present application controls the output of the pulsed optical signal according to the minimum pulse period threshold. This method can precisely manage the energy distribution in the optical fiber, thereby reducing the impact of the nonlinear effect on signal integrity. Subsequently, the pulsed optical signal after suppressing the nonlinear effect is transmitted to a preset photovoltaic cell device, which can convert the received pulsed optical signal into electrical energy. This conversion process not only improves the energy conversion efficiency but also ensures the stable supply of electrical energy. Finally, the converted electrical energy is used to supply power to the load device. This not only improves the reliability of the optical fiber communication system but also expands its application in energy supply, realizing the dual functions of optical fiber communication and energy transmission, and providing higher practical value and flexibility for the application of the optical fiber system.

[0122] This application uses a high-power laser source to obtain a continuous optical signal and preprocesses it to ensure that the signal is suitable for single-mode fiber transmission. Then, the output optical power of the fiber optic link is monitored in real time by an optical power meter. Once it is detected that the optical power drops sharply or continuously falls below a preset threshold, the system determines that a fiber fuse phenomenon has occurred. At this time, the system converts the continuous optical signal into a pulsed optical signal and adjusts the pulse period to find the minimum pulse period threshold that can terminate the fuse phenomenon. Finally, based on this minimum pulse period threshold, the output of the pulsed optical signal is controlled to suppress the nonlinear effect of the fiber optic link. This method can not only detect and respond to the fiber fuse phenomenon in a timely manner, reducing damage to the fiber optic link, but also optimize the transmission performance of the fiber by accurately controlling the period of the optical signal. This application solves the problem that the prior art cannot effectively suppress the nonlinear effect of single-mode fiber fuses.

[0123] Embodiment III:

[0124] An embodiment of this application provides a computer-readable storage medium, which includes a stored computer program. When the computer program runs, it controls the device where the computer-readable storage medium is located to execute the method for suppressing the nonlinear effect of a fiber fuse as described above.

[0125] Among them, for the method for suppressing the nonlinear effect of a fiber fuse, if it is implemented in the form of a software functional unit and used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-described embodiment methods of the present invention, it can also be completed by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0126] Embodiment IV

[0127] This application provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements any one of the methods for suppressing the nonlinear effect of a fiber fuse as described in Embodiment I.

[0128] The specific embodiments described above have further elaborated on the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. In particular, it is pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for suppressing the nonlinear effect of fiber optic fuses, characterized in that, Including: Obtain a continuous optical signal according to a preset high-power laser source; Preprocess the continuous optical signal and input it into a preset single-mode fiber optic link; According to a preset optical power meter, monitor the output optical power of the single-mode fiber optic link in real time; If it is monitored that the output optical power meets the preset conditions, confirm that a fiber fuse phenomenon has occurred, convert the continuous optical signal into a pulsed optical signal, and obtain the minimum pulse period threshold for terminating the fiber fuse phenomenon by adjusting the period of the pulsed optical signal; Control the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode fiber optic link.

2. The method for suppressing the nonlinear effect of the optical fiber fuse according to claim 1, wherein The preprocessing of the continuous optical signal specifically is: Adjust the frequency of the continuous optical signal according to a preset band-pass filter, and adjust the intensity of the continuous optical signal according to a preset acousto-optic modulator so that the continuous optical signal can be transmitted in the single-mode fiber optic link.

3. The method for suppressing the nonlinear effect of the fiber fuse according to claim 1, characterized in that, The "if it is monitored that the output optical power meets the preset conditions, confirm that a fiber fuse phenomenon has occurred" specifically is: Calculate the power drop rate per unit time according to the optically monitored power in real time; When the power drop rate is greater than a preset first threshold within a preset time, confirm that a fiber fuse phenomenon has occurred.

4. The method for suppressing the nonlinear effect of the fiber fuse according to claim 1, characterized in that, The "if it is monitored that the output optical power meets the preset conditions, confirm that a fiber fuse phenomenon has occurred" specifically is: Calculate the critical optical power for triggering the fuse according to a preset theoretical model of critical power and temperature; When the monitored optical power exceeds the critical optical power and it is detected that the optical power drops to a preset second threshold, confirm that a fiber fuse phenomenon has occurred.

5. The method for suppressing the nonlinear effect of the fiber fuse according to claim 1, wherein, The "calculate the critical optical power for triggering the fuse according to a preset theoretical model of critical power and temperature" specifically is: The preset theoretical model of critical power and temperature is: Wherein, P c is the critical optical power for triggering the fuse, T c is the temperature required to reach the fuse triggering reaction, k B is the Boltzmann constant, u0 is the activation energy related to the triggering mechanism, and γ is a constant.

6. The method for suppressing the nonlinear effect of the optical fiber fuse according to claim 1, characterized in that, The "convert the continuous optical signal into a pulsed optical signal, and obtain the minimum pulse period threshold for terminating the fiber fuse phenomenon by adjusting the period of the pulsed optical signal" specifically is: If a fiber fuse phenomenon is monitored, convert the continuous optical signal into a rectangular optical pulse according to a preset waveform generator; Adjust the period of the rectangular optical pulse and monitor the change in the output optical power of the single-mode fiber optic link in real time; If it is monitored that the value of the output optical power remains unchanged or increases, confirm that the fiber fuse phenomenon has been terminated, and use the pulse period of the rectangular optical pulse when the fiber fuse phenomenon has been terminated as the minimum pulse period threshold.

7. The method for suppressing the non-linear effect of the optical fiber fuse according to claim 1, characterized in that After the "control the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode fiber optic link", it further includes: Transmit the pulsed optical signal after suppressing the nonlinear effect to a preset photovoltaic cell device so that the photovoltaic cell device converts the received pulsed optical signal into electrical energy and supplies power to a load device.

8. A device for suppressing the nonlinear effect of an optical fiber fuse, characterized in that, Including an acquisition module, a preprocessing module, a monitoring module, a signal conversion module, and a control module; The acquisition module is used to obtain a continuous optical signal according to a preset high-power laser source; The preprocessing module is used to preprocess the continuous optical signal and input it into a preset single-mode fiber optic link; The monitoring module is used to monitor the output optical power of the single-mode fiber optic link in real time according to a preset optical power meter; The signal conversion module is used to confirm the occurrence of the fiber fuse phenomenon if it is monitored that the output optical power meets the preset conditions, convert the continuous optical signal into a pulsed optical signal, and obtain the minimum pulse period threshold for terminating the fiber fuse phenomenon by adjusting the period of the pulsed optical signal; The control module is used to control the output of the pulsed optical signal according to the minimum pulse period threshold to suppress the nonlinear effect of the single-mode fiber optic link.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein when the computer program runs, it controls the device where the computer-readable storage medium is located to execute the method for suppressing the nonlinear effect of fiber fuse as described in any one of claims 1 to 7.

10. A terminal device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the method for suppressing the nonlinear effect of fiber fuse as described in any one of claims 1 to 7.

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