Qingfeng Kong, Zhen Sun, Jie Ma, Zuntian Chen, Yanzheng Fan, Pengfei Hu
Laser fuze usually adopt an active detection method, which emits laser pulses to the target through the transmitting system. After scattering by the target, the receiving system obtains the return laser signal. By calculating the time delay between the transmitting pulse and the receiving pulse, the target distance can be calculated. Traditional circular-viewing laser fuze typically use four zones for 360 degree detection, with a detection field angle accuracy of only 90 degrees. In order to achieve accurate measurement of target azimuth angle by laser fuze, this paper proposes a method based on the position of laser spot on a photodetector to calculate the target azimuth angle. The effects of proposed method are analyzed by simulation experiment. The results demonstrate that this method can accurately detect the target azimuth angle.
{"title":"Laser circular-viewing azimuth measurement based on detector spot position","authors":"Qingfeng Kong, Zhen Sun, Jie Ma, Zuntian Chen, Yanzheng Fan, Pengfei Hu","doi":"10.1117/12.2692252","DOIUrl":"https://doi.org/10.1117/12.2692252","url":null,"abstract":"Laser fuze usually adopt an active detection method, which emits laser pulses to the target through the transmitting system. After scattering by the target, the receiving system obtains the return laser signal. By calculating the time delay between the transmitting pulse and the receiving pulse, the target distance can be calculated. Traditional circular-viewing laser fuze typically use four zones for 360 degree detection, with a detection field angle accuracy of only 90 degrees. In order to achieve accurate measurement of target azimuth angle by laser fuze, this paper proposes a method based on the position of laser spot on a photodetector to calculate the target azimuth angle. The effects of proposed method are analyzed by simulation experiment. The results demonstrate that this method can accurately detect the target azimuth angle.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"27 8","pages":"1296303 - 1296303-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138965793","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}
In recent years, there has been a surge of interest in the development of invisibility cloaks that can manipulate electromagnetic waves. This trend stems from the rapid growth of transformation optics and metamaterials technology, which offers exciting opportunities for controlling light propagation across a broad range of frequencies. One particular type of invisibility cloak that has gained significant attention is the carpet cloak. However, previous implementations of carpet cloaks have encountered limitations that hinder their performance in certain contexts. For example, quasi-conformal mapping carpet cloaks are known to produce a lateral shift in the reflected light ray, leading to undesirable effects in imaging applications. Similarly, birefringent carpet cloaks exhibit polarization dependence, which poses major challenges in situations where polarization may vary. To address these drawbacks, we propose a novel approach using an isotropic non-resonant medium and a judiciously designed conformal mapping to develop a carpet cloak. This design approach overcomes previous limitations by enabling the realization of an invisibility cloak for near-IR. Analytical calculations and numerical simulations are conducted to confirm the polarization-robust performance of this near-IR design, which offers superior performance over prior designs. Furthermore, a microwave carpet cloak design are proposed and verified to prove the universality of this approach. By developing this new approach, we hope to contribute to the advancement of cloaking technology and foster its practical applications in various fields.
{"title":"Developing a polarization-insensitive conformal near-IR carpet cloak with broadband capability to suppress lateral shift","authors":"Yao Huang, Qiran Chen","doi":"10.1117/12.3005738","DOIUrl":"https://doi.org/10.1117/12.3005738","url":null,"abstract":"In recent years, there has been a surge of interest in the development of invisibility cloaks that can manipulate electromagnetic waves. This trend stems from the rapid growth of transformation optics and metamaterials technology, which offers exciting opportunities for controlling light propagation across a broad range of frequencies. One particular type of invisibility cloak that has gained significant attention is the carpet cloak. However, previous implementations of carpet cloaks have encountered limitations that hinder their performance in certain contexts. For example, quasi-conformal mapping carpet cloaks are known to produce a lateral shift in the reflected light ray, leading to undesirable effects in imaging applications. Similarly, birefringent carpet cloaks exhibit polarization dependence, which poses major challenges in situations where polarization may vary. To address these drawbacks, we propose a novel approach using an isotropic non-resonant medium and a judiciously designed conformal mapping to develop a carpet cloak. This design approach overcomes previous limitations by enabling the realization of an invisibility cloak for near-IR. Analytical calculations and numerical simulations are conducted to confirm the polarization-robust performance of this near-IR design, which offers superior performance over prior designs. Furthermore, a microwave carpet cloak design are proposed and verified to prove the universality of this approach. By developing this new approach, we hope to contribute to the advancement of cloaking technology and foster its practical applications in various fields.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 2","pages":"129660N - 129660N-5"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994772","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}
Guangquan Zhai, Bocong An, Yue Wang, Xueliang Hu, Jingyuan Li, Dawei Yang
With the development of space infrared focal plane detectors towards large-scale, multi spectral, and high integration directions, issues such as heat leakage, micro vibration, and structural thermal adaptation have become increasingly prominent, becoming bottlenecks that restrict the application of large-sized infrared focal plane detectors. By using a new Dewar with a string structure, the support problem of infrared focal plane components has been solved. Through the analysis and verification of force thermal coupling design, the new Dewar structure has effectively reduced heat leakage, Reduced the impact of micro vibrations and avoided detector stress caused by thermal adaptation, providing a solution for the application of high-performance large-sized infrared focal planes.
{"title":"Design and implementation of a new Dewar structure for large-scale and high performance infrared focal plane","authors":"Guangquan Zhai, Bocong An, Yue Wang, Xueliang Hu, Jingyuan Li, Dawei Yang","doi":"10.1117/12.3008143","DOIUrl":"https://doi.org/10.1117/12.3008143","url":null,"abstract":"With the development of space infrared focal plane detectors towards large-scale, multi spectral, and high integration directions, issues such as heat leakage, micro vibration, and structural thermal adaptation have become increasingly prominent, becoming bottlenecks that restrict the application of large-sized infrared focal plane detectors. By using a new Dewar with a string structure, the support problem of infrared focal plane components has been solved. Through the analysis and verification of force thermal coupling design, the new Dewar structure has effectively reduced heat leakage, Reduced the impact of micro vibrations and avoided detector stress caused by thermal adaptation, providing a solution for the application of high-performance large-sized infrared focal planes.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 3","pages":"129640Q - 129640Q-9"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994778","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 modular segmented space telescope can get rid of the limitation of the effective envelope of the fairing of the existing launch vehicle, meet the requirement of the large aperture of the space telescope, and play an important role in space exploration and earth observation. In order to solve the problem of power supply and signal transmission of the primary mirror of the segmented space telescope, a kind of modularization space telescope primary mirror system for in-space assembly is first proposed in this paper. Then, according to the index requirements and the assembly process of primary mirror, the wireless energy and signal transmission scheme and system structure are proposed. By analyzing the key parameters, the optimal system of wireless energy and signal transmission on the segmented mirror is achieved. The proposed system realizes high power and high efficiency transmission of power supply energy and reliable transmission of data signal during and after assembly of the segmented mirror, and solves wire connection problems caused by the traditional wired transmission mode.
{"title":"Research on application of wireless transmission technology in in-space assembled telescope","authors":"Yuyao Wang, Qiaolin Huang, Wei Jiang","doi":"10.1117/12.3006686","DOIUrl":"https://doi.org/10.1117/12.3006686","url":null,"abstract":"The modular segmented space telescope can get rid of the limitation of the effective envelope of the fairing of the existing launch vehicle, meet the requirement of the large aperture of the space telescope, and play an important role in space exploration and earth observation. In order to solve the problem of power supply and signal transmission of the primary mirror of the segmented space telescope, a kind of modularization space telescope primary mirror system for in-space assembly is first proposed in this paper. Then, according to the index requirements and the assembly process of primary mirror, the wireless energy and signal transmission scheme and system structure are proposed. By analyzing the key parameters, the optimal system of wireless energy and signal transmission on the segmented mirror is achieved. The proposed system realizes high power and high efficiency transmission of power supply energy and reliable transmission of data signal during and after assembly of the segmented mirror, and solves wire connection problems caused by the traditional wired transmission mode.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"108 5","pages":"129630J - 129630J-12"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995147","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}
You-quan Dou, Qing-song Wang, Sen Wang, Xi Shu, Ming-hui Ni, Li-Xiao Shen, Yan Li
In order to further improve the accuracy of quantitative analysis of coal quality by laser induced breakdown spectroscopy (LIBS), the influence of data set partitioning method on quantitative model was studied. The spectral data of 40 different coal samples were collected, and the Support Vector Regression (SVR) model and random forest (RF) model were established by Random Selection (RS), Kennard-Stone (KS) and Sample Partitioning based on joint X-Y distances (SPXY), respectively. The prediction results of ash, volatile matter and calorific value under the two models were compared. The results show that the regression model established by SPXY method combined with RF algorithm has better fitting prediction performance. The predicted root mean square errors (RMSEP) of ash, volatile matter and calorific value are 1.8872, 1.4537 and 0.9020, respectively, and the mean relative errors (MRE) are 6.96%, 3.87% and 2.14%, respectively.
{"title":"Quantitative analysis of coal industrial index based on data set partitioning method","authors":"You-quan Dou, Qing-song Wang, Sen Wang, Xi Shu, Ming-hui Ni, Li-Xiao Shen, Yan Li","doi":"10.1117/12.2692262","DOIUrl":"https://doi.org/10.1117/12.2692262","url":null,"abstract":"In order to further improve the accuracy of quantitative analysis of coal quality by laser induced breakdown spectroscopy (LIBS), the influence of data set partitioning method on quantitative model was studied. The spectral data of 40 different coal samples were collected, and the Support Vector Regression (SVR) model and random forest (RF) model were established by Random Selection (RS), Kennard-Stone (KS) and Sample Partitioning based on joint X-Y distances (SPXY), respectively. The prediction results of ash, volatile matter and calorific value under the two models were compared. The results show that the regression model established by SPXY method combined with RF algorithm has better fitting prediction performance. The predicted root mean square errors (RMSEP) of ash, volatile matter and calorific value are 1.8872, 1.4537 and 0.9020, respectively, and the mean relative errors (MRE) are 6.96%, 3.87% and 2.14%, respectively.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"4 1","pages":"1295904 - 1295904-11"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995345","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}
As the requirements of space camera imaging for stability is increasing, on-orbit micro-vibration has become one of the important factors that may affect the imaging of space cameras. The motion forms of space camera caused by micro-vibration were classified, and the mechanisms by which various motions affected the imaging of space camera were analyzed. Considering the effect of optical surface elastic deformation on camera imaging, an integrated model for micro-vibration analysis of space camera was established and the analysis flow was proposed. The integrated analysis model of micro-vibration was applied to the micro-vibration analysis and design improvement of a certain type of space camera, and the analysis results were verified through satellite testing and on-orbit imaging. The verification results show that, the micro-vibration MTF of the space camera is greater than 0.993, and the maximum image motion between the homonymous pixels is less than 1.84 μ m, which meets the requirements of camera imaging.
{"title":"Micro-vibration analysis and verification of space camera based on integrated model","authors":"Ma Jun","doi":"10.1117/12.3007516","DOIUrl":"https://doi.org/10.1117/12.3007516","url":null,"abstract":"As the requirements of space camera imaging for stability is increasing, on-orbit micro-vibration has become one of the important factors that may affect the imaging of space cameras. The motion forms of space camera caused by micro-vibration were classified, and the mechanisms by which various motions affected the imaging of space camera were analyzed. Considering the effect of optical surface elastic deformation on camera imaging, an integrated model for micro-vibration analysis of space camera was established and the analysis flow was proposed. The integrated analysis model of micro-vibration was applied to the micro-vibration analysis and design improvement of a certain type of space camera, and the analysis results were verified through satellite testing and on-orbit imaging. The verification results show that, the micro-vibration MTF of the space camera is greater than 0.993, and the maximum image motion between the homonymous pixels is less than 1.84 μ m, which meets the requirements of camera imaging.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 8","pages":"129600E - 129600E-12"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138964461","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}
Fanzi Kong, Huawei Wang, Yao Fang, Chanchan Kang, Feng Zhou
Optical axis parallelism is critical to high-quality clear imaging and stable field switching during zooming. In this paper, we propose a fast measurement method of optical axis parallelism based on collimator and image processing technology. Our method improves the measurement accuracy by introducing skeleton thinning algorithm. The method realizes the automatic measurement of the optical axis parallelism during zooming and reduces subjective errors. The experimental results show that the measurement efficiency and accuracy have been improved, confirming the practical value of the method.
{"title":"Measurement method of optical axis parallelism of continuous zoom camera based on skeleton thinning algorithm","authors":"Fanzi Kong, Huawei Wang, Yao Fang, Chanchan Kang, Feng Zhou","doi":"10.1117/12.2692305","DOIUrl":"https://doi.org/10.1117/12.2692305","url":null,"abstract":"Optical axis parallelism is critical to high-quality clear imaging and stable field switching during zooming. In this paper, we propose a fast measurement method of optical axis parallelism based on collimator and image processing technology. Our method improves the measurement accuracy by introducing skeleton thinning algorithm. The method realizes the automatic measurement of the optical axis parallelism during zooming and reduces subjective errors. The experimental results show that the measurement efficiency and accuracy have been improved, confirming the practical value of the method.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"55 1","pages":"1296304 - 1296304-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138965373","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}
Na Li, Xinfeng Dong, Fuping Gan, Tongtong Li, Ruoheng Gao, Wei Bai
Minerals are natural compounds with certain chemical composition, which have stable phase interfaces and crystallization habits, and are of great significance for inversion of diagenetic and metallogenic geochemical characteristics and exploration. The use of remote sensing information to identify mineral types has achieved significant application results in the field of geology and mineral resources. In this paper, CASI-SASI-TASI airborne hyperspectral data and USGS standard spectrum library are used to establish a remote sensing image simulation method based on the combination of statistical model and Gaussian function, and the full spectrum remote sensing image with a spectral range of 425nm~12050nm and a spatial resolution of 2.25m is simulated. The simulated full spectral data were used to identify and extract 8 mineral information of limonite, hornblende, calcite/dolomite, high alumina sericite, medium alumina sericite, low alumina sericite, chlorite/epidote and quartz in Liuyuan area, Gansu Province, compared with the recognition results of airborne hyperspectral data, it was found that the two have strong consistency, this indicates that the simulated full spectrum remote sensing data in this article has strong practicality in identifying typical mineral information, and can provide important reference for the future development of spaceborne full spectrum high-resolution sensors and common key technologies.
{"title":"Mineral information recognition based on simulated high spatial resolution full spectrum remote sensing images","authors":"Na Li, Xinfeng Dong, Fuping Gan, Tongtong Li, Ruoheng Gao, Wei Bai","doi":"10.1117/12.3000827","DOIUrl":"https://doi.org/10.1117/12.3000827","url":null,"abstract":"Minerals are natural compounds with certain chemical composition, which have stable phase interfaces and crystallization habits, and are of great significance for inversion of diagenetic and metallogenic geochemical characteristics and exploration. The use of remote sensing information to identify mineral types has achieved significant application results in the field of geology and mineral resources. In this paper, CASI-SASI-TASI airborne hyperspectral data and USGS standard spectrum library are used to establish a remote sensing image simulation method based on the combination of statistical model and Gaussian function, and the full spectrum remote sensing image with a spectral range of 425nm~12050nm and a spatial resolution of 2.25m is simulated. The simulated full spectral data were used to identify and extract 8 mineral information of limonite, hornblende, calcite/dolomite, high alumina sericite, medium alumina sericite, low alumina sericite, chlorite/epidote and quartz in Liuyuan area, Gansu Province, compared with the recognition results of airborne hyperspectral data, it was found that the two have strong consistency, this indicates that the simulated full spectrum remote sensing data in this article has strong practicality in identifying typical mineral information, and can provide important reference for the future development of spaceborne full spectrum high-resolution sensors and common key technologies.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 47","pages":"1296202 - 1296202-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995080","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}
In a MEMS mirror-based dual interference Fourier transform spectrometer (FTS) with a laser interferometer as the position sensing mechanism, making the two interferometers coaxial is very challenging. To solve this problem, a single interference MEMS FTS based on asynchronous calibration is designed. This single interference FTS uses a dichroic mirror to couple a laser beam and a broadband light beam into the same interferometer. Since the two optical beams share the same optical path, they will experience the same change when the position of any optical component along the optical path is adjusted. In data acquisition, the two interference signals are acquired asynchronously by the same InGaAs photodetector. This asynchronous calibration can effectively eliminate the laser coupling issue. According to the experimental results, compared with the dual interference spectrometer, the proposed spectrometer based on asynchronous calibration can improve the spectral repeatability and make the system simpler and lower power consumption.
{"title":"A miniature Fourier transform spectrometer based on an electrothermal MEMS mirror with asynchronous calibration","authors":"Ruifan Zhao, Qiangqiang Liu, Chao Chen, Jiqiang Cao, Yuan Xue, Donglin Wang, Qian Chen, Huikai Xie","doi":"10.1117/12.3008011","DOIUrl":"https://doi.org/10.1117/12.3008011","url":null,"abstract":"In a MEMS mirror-based dual interference Fourier transform spectrometer (FTS) with a laser interferometer as the position sensing mechanism, making the two interferometers coaxial is very challenging. To solve this problem, a single interference MEMS FTS based on asynchronous calibration is designed. This single interference FTS uses a dichroic mirror to couple a laser beam and a broadband light beam into the same interferometer. Since the two optical beams share the same optical path, they will experience the same change when the position of any optical component along the optical path is adjusted. In data acquisition, the two interference signals are acquired asynchronously by the same InGaAs photodetector. This asynchronous calibration can effectively eliminate the laser coupling issue. According to the experimental results, compared with the dual interference spectrometer, the proposed spectrometer based on asynchronous calibration can improve the spectral repeatability and make the system simpler and lower power consumption.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"228 2","pages":"129620G - 129620G-5"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995096","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 precision linewidths measurement using short-delay self-heterodyne interferometers and multiple peak-to-valley differences (MPVD). The method of MPVD of the coherent envelope to determine the laser linewidth is proved to be stable. Based on the relationship within MPVD values, the delay length and laser linewidth were calculated theoretically and via simulations. We also eliminate the effect of the broadened spectrum induced by the 1/f frequency noise and the influence of noise floor on the measurement using short-delay self-heterodyne techniques, providing MPVD that can satisfy high-precision measurements without being affected by noise. The results showed that this new method is capable of significantly improving the measurement accuracy of narrow linewidth.
{"title":"Precise linewidths measurement using short delay self-heterodyne interferometry and multiple peak-to-valley differences","authors":"Yu Hao Zhang, Xu Hua Cao, Wei Chen","doi":"10.1117/12.3006300","DOIUrl":"https://doi.org/10.1117/12.3006300","url":null,"abstract":"We propose a precision linewidths measurement using short-delay self-heterodyne interferometers and multiple peak-to-valley differences (MPVD). The method of MPVD of the coherent envelope to determine the laser linewidth is proved to be stable. Based on the relationship within MPVD values, the delay length and laser linewidth were calculated theoretically and via simulations. We also eliminate the effect of the broadened spectrum induced by the 1/f frequency noise and the influence of noise floor on the measurement using short-delay self-heterodyne techniques, providing MPVD that can satisfy high-precision measurements without being affected by noise. The results showed that this new method is capable of significantly improving the measurement accuracy of narrow linewidth.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"111 2","pages":"129660Y - 129660Y-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995144","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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