Programmable photonic integrated waveguide mesh (PPIWM) is similar to field programmable gate array (FPGA) in electronics, which can be programmed to form a variety of topologies to provide different functions flexibly. In mesh structure, the calculation of transmission characteristics between arbitrary input and output ports is the premise to realize its application. With the continuous development of PPIWM in scale and structure, it is particularly important to automatically and efficiently calculate the transmission characteristics between input and output ports by programming. At present, the existing calculation method is complicated, which is not conducive to programming and has the prominent problems of low computational efficiency. In this paper, the mesh structure is mapped to a graph network represented by dual node, which is easy to be calculated programmatically. On this basis, a calculation method for solving the transfer function between arbitrary input and output ports required by the mesh is proposed by successively simplifying the nodes. This method can greatly reduce the time of solving the transfer function in the large and complex mesh structure, and has the advantages of easy programming and high efficiency. A specific example of the mesh is given to verify the effectiveness of the algorithm.
{"title":"General calculation of transmission characteristics of programmable photonic integrated waveguide mesh","authors":"Zhengyong Ji, Juan Zhang","doi":"10.1117/12.2603167","DOIUrl":"https://doi.org/10.1117/12.2603167","url":null,"abstract":"Programmable photonic integrated waveguide mesh (PPIWM) is similar to field programmable gate array (FPGA) in electronics, which can be programmed to form a variety of topologies to provide different functions flexibly. In mesh structure, the calculation of transmission characteristics between arbitrary input and output ports is the premise to realize its application. With the continuous development of PPIWM in scale and structure, it is particularly important to automatically and efficiently calculate the transmission characteristics between input and output ports by programming. At present, the existing calculation method is complicated, which is not conducive to programming and has the prominent problems of low computational efficiency. In this paper, the mesh structure is mapped to a graph network represented by dual node, which is easy to be calculated programmatically. On this basis, a calculation method for solving the transfer function between arbitrary input and output ports required by the mesh is proposed by successively simplifying the nodes. This method can greatly reduce the time of solving the transfer function in the large and complex mesh structure, and has the advantages of easy programming and high efficiency. A specific example of the mesh is given to verify the effectiveness of the algorithm.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127958741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We propose a universal method for generating high-order Swallowtail diffraction catastrophe beams, according to diffraction catastrophe theory. The curved caustic structure of Swallowtail beams (SBs) are derived from the potential function. Due to the complexity of the high-order diffraction catastrophe, the SBs can be tuned to various optical structures. Our experimental results are consistent with the numerical simulations, verifying the correctness of the theory. Further, we report a new family of autofocusing circular swallowtail beams (CSBs). Compared with the previous circular Airy and Pearcey beams, due to higher-order diffraction catastrophe, these CSBs have more propagation trajectories, and therefore seem to have more diversity and tunability. The experimental results are in good agreement with the numerical simulations. These various SBs and CSBs could have potential applications in optical trapping, optical manipulation or medical treatment.
{"title":"Generation and manipulation for high-order catastrophe swallowtail beams","authors":"Houan Teng, Yiming Cai, Yanping Ian, Y. Qian","doi":"10.1117/12.2603150","DOIUrl":"https://doi.org/10.1117/12.2603150","url":null,"abstract":"We propose a universal method for generating high-order Swallowtail diffraction catastrophe beams, according to diffraction catastrophe theory. The curved caustic structure of Swallowtail beams (SBs) are derived from the potential function. Due to the complexity of the high-order diffraction catastrophe, the SBs can be tuned to various optical structures. Our experimental results are consistent with the numerical simulations, verifying the correctness of the theory. Further, we report a new family of autofocusing circular swallowtail beams (CSBs). Compared with the previous circular Airy and Pearcey beams, due to higher-order diffraction catastrophe, these CSBs have more propagation trajectories, and therefore seem to have more diversity and tunability. The experimental results are in good agreement with the numerical simulations. These various SBs and CSBs could have potential applications in optical trapping, optical manipulation or medical treatment.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131340912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper provides a method of combining nanosecond pulsed laser ablation with chemical etching to fabricate superhydrophobic surface on AISI 316L stainless steel. Laser ablation is used to fabricate micro patterns, then chemical etching is employed to remove surface oxides and contaminants to form anisotropic microstructures. Unlike the hydrophilic laser ablated surface, the specimen treated by laser ablation-chemical etching (LACE) shows superhydrophobicity and do not require low surface energy agent. Hence, the superhydrophobic surface obtained by LACE method has great potential in the fields of self-cleaning, microfluidics and liquid directional transportation.
{"title":"Preparation of superhydrophobic surface by laser ablation-chemical etching process on stainless steel","authors":"Qinghui Chen, Yukui Cai","doi":"10.1117/12.2603046","DOIUrl":"https://doi.org/10.1117/12.2603046","url":null,"abstract":"The paper provides a method of combining nanosecond pulsed laser ablation with chemical etching to fabricate superhydrophobic surface on AISI 316L stainless steel. Laser ablation is used to fabricate micro patterns, then chemical etching is employed to remove surface oxides and contaminants to form anisotropic microstructures. Unlike the hydrophilic laser ablated surface, the specimen treated by laser ablation-chemical etching (LACE) shows superhydrophobicity and do not require low surface energy agent. Hence, the superhydrophobic surface obtained by LACE method has great potential in the fields of self-cleaning, microfluidics and liquid directional transportation.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123109502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yinbo Zhang, Sining Li, Peng Jiang, Jianfeng Sun, Liu Di, Xianhui Yang, Xin Zhang, Zhang Hailong
When using Gm-APD Lidar for depth imaging through realistic fog, the echo signal of the target is submerged in the background noise due to the strong absorption and scattering characteristics of the fog particles, resulting in serious defect of the recovered depth image of the target. To solve this problem, this paper proposes a dual-parameter estimation algorithm based on continuous wavelet transform (CWT) and maximum likelihood estimation (MLE) to improve the accuracy of fog signal estimation. Then the target and the fog signal are separated by estimating the fog signal of each pixel. Finally, the depth image of the separated target is processed by cross pixel complement and median filtering algorithms to improve the integrity of the target image. The experimental results show that, compared with the traditional algorithm, the target recovery of the reconstructed image is improved by 0.337, and the relative average ranging error is reduced by 0.3897. This research improves the weather adaptability of Gm-APD Lidar.
{"title":"Depth imaging through realistic fog using Gm-APD Lidar","authors":"Yinbo Zhang, Sining Li, Peng Jiang, Jianfeng Sun, Liu Di, Xianhui Yang, Xin Zhang, Zhang Hailong","doi":"10.1117/12.2601815","DOIUrl":"https://doi.org/10.1117/12.2601815","url":null,"abstract":"When using Gm-APD Lidar for depth imaging through realistic fog, the echo signal of the target is submerged in the background noise due to the strong absorption and scattering characteristics of the fog particles, resulting in serious defect of the recovered depth image of the target. To solve this problem, this paper proposes a dual-parameter estimation algorithm based on continuous wavelet transform (CWT) and maximum likelihood estimation (MLE) to improve the accuracy of fog signal estimation. Then the target and the fog signal are separated by estimating the fog signal of each pixel. Finally, the depth image of the separated target is processed by cross pixel complement and median filtering algorithms to improve the integrity of the target image. The experimental results show that, compared with the traditional algorithm, the target recovery of the reconstructed image is improved by 0.337, and the relative average ranging error is reduced by 0.3897. This research improves the weather adaptability of Gm-APD Lidar.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126289697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Beibei Wang, Zhigang Peng, Zhaochen Cheng, Xu Yan, Pu Wang
A hundred-watt chirped pulse amplification (CPA) fiber laser system based on Yb-doped rod-type photonic crystal fiber (PCF) is demonstrated. The seed was an all-fiber dispersion-managed mode-locked oscillator based on chirped fiber bragg grating (CFBG) and semiconductor saturable absorber mirror (SESAM). The oscillator delivers 1.5 ps pulses at a repetition rate of 45 MHz. The output power from the oscillator was 0.9 mW and the central wavelength was 1032 nm. After pulse stretching, pulse picking and amplification, 151 W output power with repetition rate of 1 MHz was achieved by employing a home-made 85/260 μm PCF (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences). After compression, laser pulses with duration of 616 fs and average power of 102.9 W were obtained. The single pulse energy and peak power were calculated to be 102.9 μJ and 167 MW respectively.
{"title":"Research on hundred-watt level megahertz femtosecond pulse laser based on rod-type photonic crystal fiber","authors":"Beibei Wang, Zhigang Peng, Zhaochen Cheng, Xu Yan, Pu Wang","doi":"10.1117/12.2603024","DOIUrl":"https://doi.org/10.1117/12.2603024","url":null,"abstract":"A hundred-watt chirped pulse amplification (CPA) fiber laser system based on Yb-doped rod-type photonic crystal fiber (PCF) is demonstrated. The seed was an all-fiber dispersion-managed mode-locked oscillator based on chirped fiber bragg grating (CFBG) and semiconductor saturable absorber mirror (SESAM). The oscillator delivers 1.5 ps pulses at a repetition rate of 45 MHz. The output power from the oscillator was 0.9 mW and the central wavelength was 1032 nm. After pulse stretching, pulse picking and amplification, 151 W output power with repetition rate of 1 MHz was achieved by employing a home-made 85/260 μm PCF (Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences). After compression, laser pulses with duration of 616 fs and average power of 102.9 W were obtained. The single pulse energy and peak power were calculated to be 102.9 μJ and 167 MW respectively.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"6 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125607444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Duan, Xiuyu Li, Wenli Liu, Zhixiong Hu, Baoyu Hong
In this article, a novel optical metrology and calibration device is designed, which can be used for the metrology and calibration of ophthalmic optical instrument - fundus cameras. Fundus camera is widely used in the field of diagnosing fundus diseases due to its high accuracy, simple structure and easy operation. The model eye we designed, including the cornea, lens and other major refractive parts of human eye can test multiple key parameters of fundus cameras, such as resolution, field of view, diopter and so on. A resolution board with micron-level precision for the detection of resolution is designed and processed by coating technology. The mechanical structures of the model eye including the cyclic structure for testing the field of view are designed and processed by 3D printing technology. In addition, different diopters have been developed for simulating nearsightedness and farsightedness. Testing results show that the model eye we designed can be used for metrology and calibration of fundus cameras, and has the advantages of high accuracy, high integration, strong stability and applicability.
{"title":"Development of metrology and calibration device for ophthalmic optical instruments: fundus cameras","authors":"L. Duan, Xiuyu Li, Wenli Liu, Zhixiong Hu, Baoyu Hong","doi":"10.1117/12.2603191","DOIUrl":"https://doi.org/10.1117/12.2603191","url":null,"abstract":"In this article, a novel optical metrology and calibration device is designed, which can be used for the metrology and calibration of ophthalmic optical instrument - fundus cameras. Fundus camera is widely used in the field of diagnosing fundus diseases due to its high accuracy, simple structure and easy operation. The model eye we designed, including the cornea, lens and other major refractive parts of human eye can test multiple key parameters of fundus cameras, such as resolution, field of view, diopter and so on. A resolution board with micron-level precision for the detection of resolution is designed and processed by coating technology. The mechanical structures of the model eye including the cyclic structure for testing the field of view are designed and processed by 3D printing technology. In addition, different diopters have been developed for simulating nearsightedness and farsightedness. Testing results show that the model eye we designed can be used for metrology and calibration of fundus cameras, and has the advantages of high accuracy, high integration, strong stability and applicability.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122729534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Within the framework of nonlinear Thomson scattering, the spectral properties of the electromagnetic radiation emitted by a tightly focused circularly polarized laser pulse acting on relatively moving electrons at different intensities are studied in detail, starting from a single-electron collision model. Through theoretical analysis and computer simulations, we investigate that the spectrum on θ = 180°has good quasi-monochromaticity for a0>1. While in the 0 case of a0>1, multiple discrete bandwidths appear in the θ = 170° as well as θ = 190° directions, and the quasi- 0 monochromaticity of the radiation spectrum is always better than that of θ = 180° with asymmetry. In addition, it is found that the laser intensity is positively correlated with the bandwidth of the radiation spectrum on θ = 180° and negatively correlated with the peak of the spectrum at the same angle. And as the laser intensity increases, the radiation energy expands in the direction of decreasing angle θ , and the radiation spectrum gradually broadens to high frequency at the maximum peak power angle θm .
{"title":"Radiation spectrum characteristics of circularly polarized laser colliding electrons at different intensities","authors":"Zujie Chen, Xinmeng Shen, Youwei Tian","doi":"10.1117/12.2600883","DOIUrl":"https://doi.org/10.1117/12.2600883","url":null,"abstract":"Within the framework of nonlinear Thomson scattering, the spectral properties of the electromagnetic radiation emitted by a tightly focused circularly polarized laser pulse acting on relatively moving electrons at different intensities are studied in detail, starting from a single-electron collision model. Through theoretical analysis and computer simulations, we investigate that the spectrum on θ = 180°has good quasi-monochromaticity for a0>1. While in the 0 case of a0>1, multiple discrete bandwidths appear in the θ = 170° as well as θ = 190° directions, and the quasi- 0 monochromaticity of the radiation spectrum is always better than that of θ = 180° with asymmetry. In addition, it is found that the laser intensity is positively correlated with the bandwidth of the radiation spectrum on θ = 180° and negatively correlated with the peak of the spectrum at the same angle. And as the laser intensity increases, the radiation energy expands in the direction of decreasing angle θ , and the radiation spectrum gradually broadens to high frequency at the maximum peak power angle θm .","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122799230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meijun Sun, Aojie Zhao, Bo Li, Jinhong Zhang, Qiming He, Xianlin Song
In recent years, photoacoustic imaging technology has developed rapidly and has become one of the most important technologies in the field of biomedical imaging. Photoacoustic imaging combines the characteristics of high contrast of optical imaging and strong penetrating power of acoustic imaging. It can obtain tissue imaging with high resolution and can also meet the requirements of quantitative analysis of changes in tissue function and physiological parameters at the same time. So, photoacoustic imaging plays an important role in disease prevention and cancer diagnosis. The traditional information acquisition of photoacoustic imaging is based on Nyquist sampling law (the sampling frequency must be greater than twice the highest signal frequency). This method will waste a lot of sampling resources in photoacoustic imaging with a large amount of data and put forward higher requirements for equipment. In order to break through the limitation of Nyquist sampling law, compressed sensing theory is used to compress and sample the signal. Then the original photoacoustic image is reconstructed by sparse key data. In this paper, Compressive Sampling Matching Pursuit (CoSaMP) is used as the reconstruction algorithm. And the compressed sensing photoacoustic imaging platform is built by K-Wave toolbox (photoacoustic imaging platform tool) of MATLAB simulation software together with the reconstruction algorithm to reconstruct the sparse photoacoustic signals observed. The qualitative and quantitative analysis is carried out on the reconstructed images. Results shows that the reconstruction effect meets the requirements, which verifies the superiority of compressed sensing theory and the reliability and advancement of compressed sensing photoacoustic imaging platform.
{"title":"Virtual compressed sensing photoacoustic imaging using CoSaMP algorithm based on k-wave","authors":"Meijun Sun, Aojie Zhao, Bo Li, Jinhong Zhang, Qiming He, Xianlin Song","doi":"10.1117/12.2603479","DOIUrl":"https://doi.org/10.1117/12.2603479","url":null,"abstract":"In recent years, photoacoustic imaging technology has developed rapidly and has become one of the most important technologies in the field of biomedical imaging. Photoacoustic imaging combines the characteristics of high contrast of optical imaging and strong penetrating power of acoustic imaging. It can obtain tissue imaging with high resolution and can also meet the requirements of quantitative analysis of changes in tissue function and physiological parameters at the same time. So, photoacoustic imaging plays an important role in disease prevention and cancer diagnosis. The traditional information acquisition of photoacoustic imaging is based on Nyquist sampling law (the sampling frequency must be greater than twice the highest signal frequency). This method will waste a lot of sampling resources in photoacoustic imaging with a large amount of data and put forward higher requirements for equipment. In order to break through the limitation of Nyquist sampling law, compressed sensing theory is used to compress and sample the signal. Then the original photoacoustic image is reconstructed by sparse key data. In this paper, Compressive Sampling Matching Pursuit (CoSaMP) is used as the reconstruction algorithm. And the compressed sensing photoacoustic imaging platform is built by K-Wave toolbox (photoacoustic imaging platform tool) of MATLAB simulation software together with the reconstruction algorithm to reconstruct the sparse photoacoustic signals observed. The qualitative and quantitative analysis is carried out on the reconstructed images. Results shows that the reconstruction effect meets the requirements, which verifies the superiority of compressed sensing theory and the reliability and advancement of compressed sensing photoacoustic imaging platform.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131566990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sibo Wang, Hong Yanji, Bang-Deng Du, Hongjie Kong, Luyun Jiang, Mingyu Li, Heyan Gao, Chentao Mao
The laser ablation micro thruster uses the target vapor or plasma jet generated by the laser ablation working fluid to obtain the reaction impulse and thrust. The working mode of the laser micro thruster is divided into two types, reflection type and transmission type. In this paper, the influence of plasma treatment on the bonding force between ablation layer and transparent layer is studied in transmission mode, and the influence of different kinds of substrate materials on the mechanical properties of laser ablation is studied. The results show that the surface activity of the PET transparent substrate is greatly improved by the formation of N-C=O or C=O active groups after plasma treatment, and the interlayer bonding force of the target band is increased by about 50%. Thus the peeling of the ablation layer and the transparent layer around the ablation pit after laser ablation target zone is eliminated. The light transmittance of PET substrate material is better than that of PI substrate material. In the case of the same thickness of ablation layer, the single pulse impulse and specific impulse of PET substrate target band are better than that of PI substrate material target band. The punching is better than the PI base material target tape. The optimization of target parameters provides guidance for further application of laser propulsion.
{"title":"Study on the influence of target parameters on the mechanical properties of laser propulsion","authors":"Sibo Wang, Hong Yanji, Bang-Deng Du, Hongjie Kong, Luyun Jiang, Mingyu Li, Heyan Gao, Chentao Mao","doi":"10.1117/12.2602252","DOIUrl":"https://doi.org/10.1117/12.2602252","url":null,"abstract":"The laser ablation micro thruster uses the target vapor or plasma jet generated by the laser ablation working fluid to obtain the reaction impulse and thrust. The working mode of the laser micro thruster is divided into two types, reflection type and transmission type. In this paper, the influence of plasma treatment on the bonding force between ablation layer and transparent layer is studied in transmission mode, and the influence of different kinds of substrate materials on the mechanical properties of laser ablation is studied. The results show that the surface activity of the PET transparent substrate is greatly improved by the formation of N-C=O or C=O active groups after plasma treatment, and the interlayer bonding force of the target band is increased by about 50%. Thus the peeling of the ablation layer and the transparent layer around the ablation pit after laser ablation target zone is eliminated. The light transmittance of PET substrate material is better than that of PI substrate material. In the case of the same thickness of ablation layer, the single pulse impulse and specific impulse of PET substrate target band are better than that of PI substrate material target band. The punching is better than the PI base material target tape. The optimization of target parameters provides guidance for further application of laser propulsion.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127009325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The design and algorithm research of the digital holographic imaging system in the near infrared band is carried out in this paper, which is based on the infrared band laser and the planar array detector. We built a set of a near infrared coaxial digital holographic imaging system based on the 1550 nm wavelength distributed feedback laser, and the system was calibrated with the resolution plate. At the same time, the compressed sensing algorithm is used to reconstruct the holograms of the resolution plate and other objects, which effectively inhibits the influence of noise. It proves that infrared digital holographic imaging technology is a new potential phase-contrast imaging method.
{"title":"Reconstruction of infrared digital holography based on compressed sensing","authors":"Haoliang Feng, Dongshun Zhang, S. Liu, Zi-li Zhang, Zhi-yuan Zheng, Haochong Huang","doi":"10.1117/12.2603158","DOIUrl":"https://doi.org/10.1117/12.2603158","url":null,"abstract":"The design and algorithm research of the digital holographic imaging system in the near infrared band is carried out in this paper, which is based on the infrared band laser and the planar array detector. We built a set of a near infrared coaxial digital holographic imaging system based on the 1550 nm wavelength distributed feedback laser, and the system was calibrated with the resolution plate. At the same time, the compressed sensing algorithm is used to reconstruct the holograms of the resolution plate and other objects, which effectively inhibits the influence of noise. It proves that infrared digital holographic imaging technology is a new potential phase-contrast imaging method.","PeriodicalId":330466,"journal":{"name":"Sixteenth National Conference on Laser Technology and Optoelectronics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128123454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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