Efficient dye laser amplification method
By introducing a high-repetition-rate ultrafast laser pump source, an intelligent thermal management system, and deep learning model optimization, combined with photonic crystal frequency doubling crystal and microfluidic system, the problems of beam non-uniformity and inaccurate temperature control in dye laser amplification technology have been solved, achieving efficient and stable laser output and extended equipment life.
Patent Information
- Application Number
- CN202411598338.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2044-11-11
AI Technical Summary
Existing dye laser amplification technology suffers from problems such as uneven beam quality, inaccurate temperature and dye concentration control, and high energy consumption of the thermal management system, which leads to unstable laser output and shortened equipment life.
Employing a high-repetition-rate ultrafast laser pump source, an intelligent thermal management system, real-time data monitoring and standardized processing, deep learning model optimization, and a photonic crystal frequency doubling crystal, the system expands the beam and collimates the pump light through a telescope system, adjusts the dye concentration using a microfluidic system, monitors the concentration using a fluorescence detection system, and utilizes a deep learning model for data analysis and system parameter optimization to achieve precise control of temperature and concentration.
It significantly improves laser amplification efficiency and stability, reduces energy consumption, extends equipment lifespan, enhances system adaptability and flexibility, and expands the application range of laser systems.
Smart Images

Figure CN119542903B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of laser amplification, in particular to a high-efficiency dye laser amplification method. BACKGROUND
[0002] High-efficiency dye laser amplification technology is an important optical amplification technology, widely used in scientific research, medical diagnosis, industrial processing and other fields. Dye laser amplification technology uses organic dye as gain medium, through external pump light source to excite dye molecules, to realize laser amplification. Due to the diversity of energy level structure of dye molecules and the wide tunable range, dye laser can produce tunable laser output from ultraviolet to near infrared range, with high efficiency, high beam quality and wide spectral tuning range.
[0003] The existing dye laser amplification technology mainly relies on traditional pump light source and dye box structure. The pump light source usually adopts continuous wave or pulse laser, and the pump beam is introduced into the dye box through focusing optical system to excite dye molecules to produce stimulated radiation. The dye solution in the dye box is maintained stable in concentration and temperature by circulating system to improve the laser amplification efficiency and output power. By accurately controlling the pump light intensity and dye concentration, the existing technology can realize high laser amplification gain and output power.
[0004] Although the existing dye laser amplification technology can realize high laser amplification gain and output power, there are still some deficiencies. First, the uneven beam quality leads to low amplification efficiency, affecting the stability and consistency of laser output. Second, the existing technology is not accurate enough in controlling temperature and dye concentration, resulting in unstable system performance and shortening the service life of the equipment. In addition, the traditional thermal management system has high energy consumption and poor cooling effect, which is difficult to effectively control the temperature of the laser amplifier. SUMMARY
[0005] In view of the deficiencies of the prior art, the present application provides a high-efficiency dye laser amplification method. By introducing high-repetition-rate ultrafast laser pump source, intelligent thermal management system, real-time data monitoring and standardized processing, deep learning model optimization and other measures, the present application significantly improves the beam quality and stability of the dye laser amplification system, accurately controls the temperature and dye concentration, reduces the energy consumption and maintenance cost, and prolongs the service life of the equipment.
[0006] To achieve the above purpose, the present application realizes the following technical scheme: a high-efficiency dye laser amplification method, comprising the following steps:
[0007] Use high-repetition-rate ultrafast laser as pump source, and expand and collimate the pump light through telescope system;
[0008] Adjust the dye concentration in real time through microfluidic system, and monitor the dye concentration in real time by fluorescence detection system;
[0009] Using photonic crystal frequency-doubling crystal for frequency-doubling conversion;
[0010] Collecting pump light intensity, dye concentration and output power data, and performing standardization processing;
[0011] Data analysis and system parameter optimization are performed through a deep learning model;
[0012] Real-time monitoring and adjustment of the temperature distribution of the laser amplifier is realized by using an intelligent thermal management system.
[0013] Preferably, the pump light intensity signal is monitored by a photodiode sensor, and the calculation formula is:
[0014]
[0015] Wherein, is the pump light intensity, is the photodiode output voltage, is the responsivity of the photodiode, is the effective area.
[0016] Preferably, the dye concentration is measured in real time by a microfluidic chip and a fluorescence detection system, and the calculation formula is:
[0017]
[0018] Wherein, is the dye concentration, is the fluorescence detection coefficient, is the fluorescence intensity.
[0019] Preferably, the output power is monitored in real time by a power meter, and the calculation formula is:
[0020]
[0021] Wherein, is the output power, is the power meter voltage output, is the power meter gain, is the calibration factor.
[0022] Preferably, the design and manufacturing steps of the photonic crystal frequency-doubling crystal include:
[0023] The plane wave expansion method is used to calculate the photonic crystal bandgap structure, and the calculation formula is:
[0024]
[0025] Wherein, : bandgap center frequency, : wave vector, : reciprocal lattice vector, : dielectric constant, : electric field component;
[0026] Adjusting the period of photonic crystal and the filling rate , the optimization formula is:
[0027]
[0028] wherein, : photonic crystal period, is the frequency doubling wavelength, : effective refractive index, : filling rate of high refractive index material, : refractive index of high refractive index material, : refractive index of low refractive index material.
[0029] Preferably, the standardization processing step includes data cleaning and standardization:
[0030] During data acquisition, a timestamp is added to each data point for time alignment during subsequent processing;
[0031] Smooth the data using a median filter or mean filter to remove burst noise;
[0032] The specific formula for standardization is:
[0033]
[0034] wherein, is the cleaned data, median is the median filter function, is the window size, is the standardized data, is the original data, is the data mean, is the data standard deviation.
[0035] Preferably, the deep learning model processes data and optimizes system parameters through a convolutional neural network and a recurrent neural network.
[0036] Preferably, the training of the deep learning model uses a mean square error loss function and a regularization term, and the calculation formula is:
[0037]
[0038] wherein, is the loss function, denotes the model parameters, and are actual and predicted system outputs, respectively, is the total number of samples, is the regularization coefficient.
[0039] Preferably, the intelligent thermal management system uses thermal imaging technology to monitor temperature distribution in real time, and adjusts temperature according to the following formula:
[0040]
[0041] wherein, is the predicted temperature at the next time point, is the current temperature, is the ambient temperature, is the adjustment coefficient.
[0042] Preferably, the telescope system is composed of a convex lens and a concave lens to realize beam expansion and collimation, and the magnification formula is:
[0043]
[0044] wherein, is the magnification, and are the focal lengths of the concave lens and the convex lens, respectively.
[0045] The present application provides a high-efficiency dye laser amplification method. It has the following beneficial effects:
[0046] 1. The present application integrates a high-repetition-rate ultrafast laser pumping source and a telescope system to realize uniform beam expansion and collimation, significantly improving the efficiency and stability of laser amplification. Compared with the prior art, the present application effectively reduces the influence of non-uniform spot on the amplification effect, ensuring the quality and consistency of the output beam.
[0047] 2. The present application combines a microfluidic system and a fluorescence detection system to monitor and adjust the dye concentration in real time, and cooperates with an intelligent thermal management system to accurately control the temperature using thermal imaging technology. This technology solves the performance instability problem caused by temperature and concentration fluctuations in the prior art, improving the reliability and life of the system.
[0048] 3. The present application uses standardized processing and deep learning models for data analysis and system optimization to realize dynamic adjustment of laser system parameters. The mean square error loss function and regularization term are used to ensure the prediction accuracy and stability of the model.
[0049] 4、The application optimizes the design of the photonic crystal frequency-doubling crystal, calculates the bandgap structure using the plane wave expansion method, and adjusts the period and filling rate of the photonic crystal, thereby realizing efficient frequency-doubling conversion. BRIEF DESCRIPTION OF DRAWINGS
[0050] Figure 1 The method flowchart of the application. DETAILED DESCRIPTION
[0051] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the specification of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.
[0052] Please refer to the accompanying Figure 1 The embodiment of the application provides a high-efficiency dye laser amplification method, which comprises the following steps.
[0053] The high-repetition-rate ultrafast laser is used as a pump source, the telescope system is used for beam expansion and collimation of the pump light, the femtosecond laser system is selected as the pump source, and continuous high-energy input is provided, which is suitable for efficient light amplification; the beam shaping device such as the telescope system is used for beam expansion and collimation, the pump light is expanded and collimated, the beam quality is optimized, the uniformity and stability of the incident pump light are improved, the pump light obtains a larger uniform light spot before entering the dye box through expansion and collimation, the non-uniform energy distribution caused by the non-uniform pump light spot is reduced, the energy conversion efficiency and the quality of the output laser are improved, the pump light after expansion and collimation can excite the dye molecules more uniformly, the dye amplification effect is enhanced, and the overall efficiency of the laser system and the stability of the output laser are improved.
[0054] The dye concentration is adjusted in real time through the microfluidic system, the dye concentration is monitored in real time through the fluorescence detection system, the flow rate and concentration of the dye are accurately controlled through the microfluidic chip and the electric valve, the fluorescence detector is set to monitor the fluorescence intensity of the dye in the dye box, the concentration state of the dye is reflected, the dye concentration is monitored and adjusted in real time, the optical properties of the dye are matched with the laser amplification demand, the light energy conversion efficiency is optimized, the dye concentration is monitored and adjusted in real time, the optical properties of the dye are matched with the laser amplification demand, the light energy conversion efficiency is optimized, the dye concentration is adjusted in real time, the dynamic changes in the laser amplification process can be coped with, the continuity and stability of the laser output are maintained, and the response speed and adaptability of the system are improved.
[0055] The photon crystal frequency doubling crystal is used for frequency doubling conversion, a photon crystal with a specific periodic structure is designed and manufactured, the structure can produce strong local field enhancement at a specific wavelength, and the frequency doubling efficiency is improved, the adjusted dye laser passes through the photon crystal frequency doubling crystal, the wavelength of the pump light is converted into the required output wavelength by using the nonlinear optical characteristics of the crystal, the light band gap generated by the periodic structure of the photon crystal strengthens the local enhancement effect of the light field at a specific wavelength, so that the nonlinear frequency doubling process is more efficient, the efficiency of the frequency doubling conversion is significantly improved, the energy loss is reduced, and higher intensity laser output is obtained;
[0056] Collecting pump light intensity, dye concentration and output power data and performing standardization processing, collecting the data of pump light intensity, dye concentration and laser output power in real time using sensors and measuring equipment, denoising, standardizing and synchronizing the collected data, ensuring data quality, providing accurate input for data analysis, improving the training effect and prediction accuracy of the subsequent deep learning model, and ensuring that the laser system optimization is based on accurate real-time data;
[0057] Data analysis and system parameter optimization are performed through a deep learning model, which can learn the relationship between pump light, dye and output power from complex data, automatically find the optimal parameter combination for improving laser performance, realize self-optimization of the laser system, significantly improve the stability and efficiency of laser output, and reduce the need and time for manual adjustment;
[0058] Real-time monitoring and adjustment of the temperature distribution of the laser amplifier is realized by using an intelligent thermal management system, a thermal sensor and a thermal imager are used to monitor the temperature distribution of the laser amplifier, the internal temperature is adjusted in real time through a cooling system, and the cooling system is automatically adjusted according to real-time temperature data to maintain the best working temperature, and the performance degradation or damage caused by temperature rise during the laser amplification process is avoided through real-time thermal management, the best working state of the laser equipment is maintained, the intelligent thermal management system ensures that the laser amplifier works at the best temperature, prolongs the service life of the equipment, maintains high output performance, and avoids equipment failure caused by overheating.
[0059] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the intensity signal of the pump light is monitored by a photodiode sensor, and the calculation formula is:
[0060]
[0061] Wherein, is the pump light intensity, is the output voltage of the photodiode, is the responsivity of the photodiode, For the effective area, a high response speed photodiode suitable for the pumping laser wavelength is selected, when the pumping light irradiates on the photodiode, the photoelectric effect makes the electrons excited and generates current, this current is converted into voltage signal through the circuit. The size of the voltage is proportional to the intensity of the irradiated light, through the known photodiode responsivity and effective area, the voltage signal can be converted into accurate light intensity value, by monitoring the light intensity of the pumping light in real time, the laser amplification system can be ensured to run under the best optical input condition, thereby improving the efficiency of the laser amplification and the quality of the output light beam, the light intensity data supports the real-time feedback adjustment of the system, when the pumping light intensity changes, the system can automatically adjust the corresponding parameters, such as the dye concentration and the position of the frequency doubling crystal, to maintain the stability of the laser output, the real-time monitoring of the pumping light intensity also helps to identify the signs of laser performance degradation or failure early, through preventive maintenance, larger equipment failures and downtime can be avoided, and maintenance costs can be reduced.
[0062] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the dye concentration is measured in real time by a microfluidic chip and a fluorescence detection system, and the calculation formula is:
[0063]
[0064] Among them, is the dye concentration, is the fluorescence detection coefficient, is the fluorescence intensity, a microfluidic chip is designed to accurately control the flow of the dye solution, and a fluorescence detector is installed in the detection area of the microfluidic chip to ensure that the dye solution can be accurately detected when it flows through the detection area. When the pumping light excites the dye molecules, the dye molecules emit fluorescence. The fluorescence intensity is proportional to the dye concentration, and the dye concentration can be indirectly measured by detecting the fluorescence intensity. The fluorescence detector converts the fluorescence signal into an electrical signal, and the electrical signal is converted into a dye concentration value through a pre-calibrated detection coefficient. Through the fluorescence detection system, high-precision real-time monitoring of the dye concentration can be realized, ensuring that the dye concentration is always in the best amplification state, optimizing the laser output. The dye concentration data can be fed back to the control system in real time, and when the change of the dye concentration is detected, the system can automatically adjust the flow of the microfluidic chip to maintain the stability of the dye concentration. Real-time monitoring and adjustment of the dye concentration can prevent the instability of the laser output caused by the fluctuation of the dye concentration, ensure the continuity and consistency of the laser output, and at the same time, through the accurate control of the amount of dye used, the waste of dye is avoided, the operation cost is reduced, and the pollution to the environment is reduced.
[0065] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the output power is monitored in real time by a power meter, and the calculation formula is:
[0066]
[0067] wherein, Pout is the output power, Vout is the power meter voltage output, G is the power meter gain, C is the calibration factor, a high-precision laser power meter suitable for the laser wavelength and power range is selected. The power meter should be installed at the end of the laser output light path to measure the output laser power in real time. The power meter output electrical signal is connected to the data acquisition system to record and process the output power data in real time. The power meter converts the laser power into an electrical signal through photoelectric conversion, and the size of the electrical signal is proportional to the laser power. Through the known calibration factor, the electrical signal can be converted into the actual output power value. Real-time monitoring of the laser output power ensures that the output power is always within the preset range, improving the stability and reliability of the system. The output power data can be used for feedback control of the system. When the output power fluctuates, the system can automatically adjust the pump light intensity and dye concentration to maintain stable laser output.
[0068] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the design and manufacturing steps of the photonic crystal frequency doubling crystal include:
[0069] The plane wave expansion method is used to calculate the photonic crystal band gap structure, and the calculation formula is:
[0070]
[0071] wherein, : the center frequency of the band gap, : the wave vector, : the reciprocal lattice vector, : the dielectric constant, : the electric field component, this method is used to calculate the band gap structure of a photonic crystal composed of materials with periodic dielectric constant distribution. The plane wave expansion method expands the Bloch-Floquet wave function of the electromagnetic field into a plane wave basis set, thereby calculating the propagation characteristics of electromagnetic waves in a periodic medium. The calculated band gap can explicitly represent the forbidden light wave propagation region in certain frequency range, which is crucial for designing structures with specific optical effects;
[0072] Adjust the period and the filling rate of the photonic crystal, and the optimization formula is:
[0073]
[0074] wherein, : the period of the photonic crystal, : the frequency doubling wavelength, : the effective refractive index, : filling rate of high refractive index material, : refractive index of high refractive index material, : refractive index of low refractive index material, according to the band gap calculation result, the period and filling rate of the photonic crystal are adjusted to achieve the required frequency multiplication effect. The period determines the size of the crystal structure, and the filling rate affects the proportion of high and low refractive index materials in the crystal, and thus affects the effective refractive index of the whole structure. Through accurate calculation and design of the band gap structure of the photonic crystal, the local enhancement of light waves of specific wavelengths in the crystal can be realized, thereby effectively improving the frequency multiplication conversion efficiency. This makes low-energy pump light can be effectively converted into high-energy output light, enhancing the application range and flexibility of the laser system. The optimized photonic crystal not only improves the frequency multiplication efficiency, but also improves the performance and reliability of the entire laser system by reducing light loss and improving light stability.
[0075] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the standardization processing step includes data cleaning and standardization:
[0076] During data acquisition, a timestamp is added to each data point for time alignment in subsequent processing. The purpose of adding the timestamp is to ensure that all data points can be accurately matched during subsequent processing and analysis, thereby ensuring the consistency and accuracy of data processing. Through accurate timestamp, it ensures that data from different sources can be seamlessly integrated, improves the accuracy and reliability of data analysis, and reduces data errors caused by time misalignment;
[0077] Smooth the data using a median filter or mean filter to remove burst noise. The median filter or mean filter is used to smooth the data and remove burst noise. The median filter has good suppression effect on burst noise and is suitable for data processing containing peak noise. Data cleaning effectively removes burst noise and high-frequency noise in the data, improving the smoothness and continuity of the data, and providing higher quality data input for subsequent standardization and analysis;
[0078] The specific formula for standardization is:
[0079]
[0080] Wherein, is the cleaned data, median is the median filter function, is the window size, is the standardized data, is the original data, is the data mean, The data standard deviation is a standard normal distribution with zero mean and unit standard deviation, which eliminates the dimensional difference between the data, and the standardized data has a unified scale, improving the comparability between different data, providing more consistent and reliable data input for deep learning model training and data analysis.
[0081] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the deep learning model processes data and optimizes system parameters through convolutional neural networks and recurrent neural networks, which can simultaneously process multi-dimensional data and time series data in the laser system, realize comprehensive data analysis and system optimization, and improve the overall performance and stability of the laser system.
[0082] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the training of the deep learning model uses the mean square error loss function and the regularization term, and the calculation formula is:
[0083]
[0084] wherein, is the loss function, represents the model parameters, and are the actual and predicted system outputs, is the total number of samples, is the regularization coefficient, the mean square error loss function minimizes the square difference between the predicted value and the actual value, guiding the update of the model parameters, so that the predicted value is as close to the actual value as possible, and the regularization term prevents the model from overfitting the training data by penalizing the model parameters, improving the generalization ability of the model. Using the mean square error loss function and the regularization term can effectively guide the model training, balance the fitting ability and generalization ability of the model, avoid overfitting, and improve the prediction accuracy and stability of the model.
[0085] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the intelligent thermal management system uses thermal imaging technology to monitor the temperature distribution in real time, and adjusts the temperature according to the following formula:
[0086]
[0087] wherein, is the predicted temperature at the next time point, is the current temperature, is the ambient temperature, The adjustment coefficient is selected from a high-resolution and high-precision thermal imaging camera, which can capture the temperature distribution inside the laser amplifier in real time. The thermal imaging camera is calibrated to ensure accurate temperature measurement. The thermal imaging camera collects temperature data inside the laser amplifier in real time and generates a thermal image. The thermal image data is transmitted to the data processing system through a data interface for subsequent analysis and processing. The thermal imaging technology uses infrared radiation principles to convert the temperature distribution on the surface of the object into a visual thermal image, which can accurately and in real time reflect the temperature changes inside the laser amplifier. Real-time monitoring of temperature distribution can quickly identify temperature abnormal areas and prevent overheating of the laser amplifier, which can cause performance degradation or damage. This improves the reliability and safety of the system. According to the prediction results of the temperature adjustment formula, the intelligent cooling system automatically adjusts the cooling parameters such as cooling liquid flow rate and cooling fan speed to achieve precise temperature control. The cooling system continuously receives the latest temperature data and dynamically adjusts the cooling strategy to ensure that the temperature remains within the ideal range. The intelligent thermal management system can effectively control the temperature of the laser amplifier, avoid performance problems caused by excessive or insufficient temperature, prolong the service life of the equipment, reduce maintenance and replacement costs, and ensure the stability and efficiency of the system.
[0088] Please refer to the attached Figure 1 In a preferred embodiment of the present application, the telescope system is composed of a convex lens and a concave lens to realize beam expansion and collimation. The magnification formula is:
[0089]
[0090] wherein, is the magnification, and are the focal lengths of the concave and convex lenses respectively. High-quality convex and concave lenses are selected to ensure accurate focal length and high material transparency to reduce optical loss. The concave and convex lenses are installed in the beam expansion system according to the designed optical path to ensure that the lens center is aligned with the laser beam center. The laser beam is expanded through the concave lens and then collimated through the convex lens. The concave lens serves to diverge the beam, while the convex lens serves to recollimate the divergent beam to make it a parallel beam. Through the beam expansion and collimation of the telescope system, the uniformity of the laser beam is significantly improved, reducing the impact of uneven spots on the laser amplification effect. Uniform beam distribution improves the efficiency of dye laser amplification, making the output laser energy more stable and consistent. Through the combination of convex and concave lenses, efficient beam expansion and collimation are achieved, optimizing the performance of the laser system and improving the efficiency of laser amplification and the quality of the output beam, ensuring efficient and stable operation of the system in various applications.
[0091] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.
Claims
1. A high-efficiency dye laser amplification method, characterized by, The method comprises the following steps: Using high-repetition-rate ultrafast laser as pump source, the pump light is expanded and collimated through a telescope system; Real-time adjustment of dye concentration through microfluidic system, real-time monitoring of dye concentration through fluorescence detection system; Using photonic crystal frequency doubling crystal for frequency doubling conversion; Collecting pump light intensity, dye concentration and output power data, and performing standardization processing; Data analysis and system parameter optimization through deep learning model; Real-time monitoring and adjustment of temperature distribution of laser amplifier through intelligent thermal management system; The deep learning model processes data and optimizes system parameters through convolutional neural networks and recurrent neural networks; The standardization processing step includes data cleaning and standardization: During data acquisition, a timestamp is added to each data point for subsequent time alignment; Smooth the data using median filter or mean filter to remove burst noise; The specific formula for standardization is: ; wherein, is the cleaned data, median is the median filter function, is the window size, is the normalized data, is the original data, is the data mean, is the data standard deviation.
2. The method of claim 1, wherein the high efficiency dye laser amplification method is characterized by, The pump light intensity signal is monitored by a photodiode sensor, and the calculation formula is: ; wherein, is the pump light intensity, is the photodiode output voltage, is the responsivity of the photodiode, is the effective area.
3. The method of claim 1, wherein the high efficiency dye laser amplification method is characterized by, The dye concentration is measured in real time by a microfluidic chip and a fluorescence detection system, and the calculation formula is: ; wherein, is the dye concentration, is the fluorescence detection coefficient, is the fluorescence intensity.
4. The method of claim 1, wherein the high efficiency dye laser amplification method is characterized by, The output power is monitored in real time by a power meter, and the calculation formula is: ; wherein, Pout is the output power, Vout is the power meter voltage output, G is the power meter gain, C is the calibration factor.
5. The method of claim 1, wherein the high efficiency dye laser amplification method is characterized by, The design and manufacturing steps of the photonic crystal frequency doubling crystal include: Using the plane wave expansion method to calculate the photonic crystal bandgap structure, the calculation formula is: ; wherein : bandgap center frequency, : wave vector, : reciprocal lattice vector, : dielectric constant, : electric field component; Adjusting the period of a photonic crystal and the fill factor The optimization formula is: ; wherein : period of the photonic crystal, : frequency-doubled wavelength, : effective refractive index, : filling rate of the high refractive index material, : refractive index of the high refractive index material, : refractive index of the low refractive index material.
6. The method of claim 1, wherein the high efficiency dye laser amplification method is characterized by, The training of the deep learning model uses mean square error loss function and regularization term, the calculation formula is: ; wherein, is a loss function, denotes model parameters, and are actual and predicted system outputs, respectively, is the total number of samples, is a regularization coefficient.
7. The method of claim 1, wherein the high efficiency dye laser amplification method is characterized by, The intelligent thermal management system uses thermal imaging technology to monitor the temperature distribution in real time, and adjusts the temperature according to the following formula: ; wherein, is a predicted temperature for a next time point, is a current temperature, is an ambient temperature, is an adjustment factor.
8. The method of claim 1, wherein the high efficiency dye laser amplification method is characterized by, The telescope system is composed of convex lens and concave lens, which realizes beam expansion and collimation, and the magnification formula is: ; wherein, is the magnification, and are the focal lengths of the concave and convex lenses, respectively.
Citation Information
Patent Citations
Dye laser device
JP2000077763A
Method and apparatus for regenerating and regulating dye solution of dye laser
JP2003304020A