Triple-junction GaAs solar cells were irradiated by nanosecond pulse laser with a wavelength of 1064nm, in atmospheric and vacuum environments respectively to study the damage characteristics of triple-junction GaAs solar cells irradiated nanosecond pulse laser in different environments, and the damage effects of pulse laser in two environments were compared and analyzed. The experimental results show that the damage of solar cells irradiated by nanosecond pulse laser is significantly affected by the target energy density, and the damage effect is positively correlated with the number of pulses, which increases with the number of pulses. Due to the high peak power, short action time, no obvious thermal effect of the action process, and no material migration phenomenon, the damage effect of solar cells is similar under pulsed laser irradiation with the same parameters in different environments.
{"title":"Comparative study on damage characteristics of triple-junction GaAs solar cell irradiated by pulsed laser in different environments","authors":"Yuehong Hu, Jie Peng, Siqi Liu, Zhihua Wu, Huailong Fu, Mingbo He, Luming Huang","doi":"10.1117/12.3000613","DOIUrl":"https://doi.org/10.1117/12.3000613","url":null,"abstract":"Triple-junction GaAs solar cells were irradiated by nanosecond pulse laser with a wavelength of 1064nm, in atmospheric and vacuum environments respectively to study the damage characteristics of triple-junction GaAs solar cells irradiated nanosecond pulse laser in different environments, and the damage effects of pulse laser in two environments were compared and analyzed. The experimental results show that the damage of solar cells irradiated by nanosecond pulse laser is significantly affected by the target energy density, and the damage effect is positively correlated with the number of pulses, which increases with the number of pulses. Due to the high peak power, short action time, no obvious thermal effect of the action process, and no material migration phenomenon, the damage effect of solar cells is similar under pulsed laser irradiation with the same parameters in different environments.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 30","pages":"1295909 - 1295909-7"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138964367","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}
Theoretical analysis and experimental research are carried out on the signal processing of pyroelectric sensor D203S used in infrared carbon and sulfur analyzer. The circuit system formed, through simulation and actual measurement, optimizes the circuit parameters, and obtains experimental results that meet the requirements of bandwidth and signal-to-noise ratio.
{"title":"Research on signal processing circuit of pyroelectric sensor used in infrared carbon and sulfur analyzer","authors":"Jianjun Wu, Honglie Xu","doi":"10.1117/12.3007160","DOIUrl":"https://doi.org/10.1117/12.3007160","url":null,"abstract":"Theoretical analysis and experimental research are carried out on the signal processing of pyroelectric sensor D203S used in infrared carbon and sulfur analyzer. The circuit system formed, through simulation and actual measurement, optimizes the circuit parameters, and obtains experimental results that meet the requirements of bandwidth and signal-to-noise ratio.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 35","pages":"129630O - 129630O-5"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138964490","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}
Zeyu Yu, Bei Chen, Zhaoyang Zhang, Zichao Zhao, Maohui Li, Yuehai Wang, Jianyi Yang
We propose a two-dimensional beam scanner based on hitless microring switch array. By changing the resonance state of the microring interference between different wavelength selection switches is avoided. The operation complexity of the beam steering FPA chip based on the microring switch array is reduced.
{"title":"Two-dimensional beam steering based on hitless wavelength-selective switch array","authors":"Zeyu Yu, Bei Chen, Zhaoyang Zhang, Zichao Zhao, Maohui Li, Yuehai Wang, Jianyi Yang","doi":"10.1117/12.3007818","DOIUrl":"https://doi.org/10.1117/12.3007818","url":null,"abstract":"We propose a two-dimensional beam scanner based on hitless microring switch array. By changing the resonance state of the microring interference between different wavelength selection switches is avoided. The operation complexity of the beam steering FPA chip based on the microring switch array is reduced.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"117 1","pages":"129661W - 129661W-5"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138965008","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 passive terahertz imaging human body security technology has begun to be applied in dense pedestrian flow security fields such as subways and public venues. However, passive terahertz imaging systems directly generate terahertz images, which have problems such as low signal-to-noise ratio and poor resolution. For the identification of suspicious objects hidden under human clothing, the naked eye observation method by security personnel is difficult to distinguish suspicious objects, with a high error rate and slow speed. To balance the accuracy and speed of detecting suspicious objects hidden under human clothing in security scenarios, taking into account terahertz image quality and target detection accuracy, a DeepLabV3+ deep learning model is used to detect targets, achieving object detection and recognition based on passive terahertz imaging human security systems.
{"title":"Terahertz detection and recognition of suspicious objects hidden in the human body based on DeepLabV3+ deep learning model","authors":"Yaoyao Xue, Qiqi Li, Mingyang Jiang, Jiusheng Li","doi":"10.1117/12.3005284","DOIUrl":"https://doi.org/10.1117/12.3005284","url":null,"abstract":"The passive terahertz imaging human body security technology has begun to be applied in dense pedestrian flow security fields such as subways and public venues. However, passive terahertz imaging systems directly generate terahertz images, which have problems such as low signal-to-noise ratio and poor resolution. For the identification of suspicious objects hidden under human clothing, the naked eye observation method by security personnel is difficult to distinguish suspicious objects, with a high error rate and slow speed. To balance the accuracy and speed of detecting suspicious objects hidden under human clothing in security scenarios, taking into account terahertz image quality and target detection accuracy, a DeepLabV3+ deep learning model is used to detect targets, achieving object detection and recognition based on passive terahertz imaging human security systems.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"115 2","pages":"129600Q - 129600Q-4"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138965031","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}
Yuexing Wang, Chuangang Xu, Jianzhong Su, Jinwen Tian
With the advancement of drone technology, object detection from the perspective of drones has found extensive applications in various fields, including surveillance, search operations, and reconnaissance tasks. Currently, most drones in the market are equipped with visible light imagers, while some high-end drones are equipped with infrared imaging detectors capable of performing infrared object detection tasks. Infrared imaging utilizes a passive imaging mode, enabling it to detect thermal radiation emitted by objects. As a result, it offers the distinct advantage of continuous operation without being restricted by daylight conditions. In comparison to visible imaging, infrared imaging uses longer wavelengths and possesses a certain level of penetration capability through clouds and smoke. Consequently, infrared object detection represents a significant research area within the field of object detection. However, detecting infrared objects, especially small ones, remains challenging due to the complexity of background information, lower resolution compared to visible images, and the lack of shape and texture information in infrared images. In response to these challenges, this study proposes a real-time drone-perspective infrared (IR) object detection method based on the YOLOv5 framework, known as DIR-YOLOv5. To effectively address the challenge of infrared vehicles occupying fewer pixels in the drone’s perspective image and making objects difficult to detect, the coordinate attention (CA) for feature enhancement is introduced. we also introduce a Spatial-Channel dynamic and query-aware sparse attention mechanism (SCBiFormer), which is optimized based on BiFormer. Additionally, we redefine the loss function as the Repulsion Loss function to tackle the problem of infrared vehicle objects gathering and overlapping occlusion in scenarios like parking lots. Furthermore, we expand the ISVD infrared image object detection dataset to include multiple scenarios and conduct experiments using this dataset. The experimental results demonstrate the excellent performance of the proposed method in infrared image object detection tasks, showing improved object detection accuracy and reduced false detection rate compared to current mainstream methods.
{"title":"DIR-YOLOv5: a real-time drone-perspective infrared object detection method based on YOLOv5","authors":"Yuexing Wang, Chuangang Xu, Jianzhong Su, Jinwen Tian","doi":"10.1117/12.2692731","DOIUrl":"https://doi.org/10.1117/12.2692731","url":null,"abstract":"With the advancement of drone technology, object detection from the perspective of drones has found extensive applications in various fields, including surveillance, search operations, and reconnaissance tasks. Currently, most drones in the market are equipped with visible light imagers, while some high-end drones are equipped with infrared imaging detectors capable of performing infrared object detection tasks. Infrared imaging utilizes a passive imaging mode, enabling it to detect thermal radiation emitted by objects. As a result, it offers the distinct advantage of continuous operation without being restricted by daylight conditions. In comparison to visible imaging, infrared imaging uses longer wavelengths and possesses a certain level of penetration capability through clouds and smoke. Consequently, infrared object detection represents a significant research area within the field of object detection. However, detecting infrared objects, especially small ones, remains challenging due to the complexity of background information, lower resolution compared to visible images, and the lack of shape and texture information in infrared images. In response to these challenges, this study proposes a real-time drone-perspective infrared (IR) object detection method based on the YOLOv5 framework, known as DIR-YOLOv5. To effectively address the challenge of infrared vehicles occupying fewer pixels in the drone’s perspective image and making objects difficult to detect, the coordinate attention (CA) for feature enhancement is introduced. we also introduce a Spatial-Channel dynamic and query-aware sparse attention mechanism (SCBiFormer), which is optimized based on BiFormer. Additionally, we redefine the loss function as the Repulsion Loss function to tackle the problem of infrared vehicle objects gathering and overlapping occlusion in scenarios like parking lots. Furthermore, we expand the ISVD infrared image object detection dataset to include multiple scenarios and conduct experiments using this dataset. The experimental results demonstrate the excellent performance of the proposed method in infrared image object detection tasks, showing improved object detection accuracy and reduced false detection rate compared to current mainstream methods.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"134 1","pages":"1296003 - 1296003-10"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138965077","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}
A composite piezoelectric deformable mirror (DM) with woofer-tweeter configuration is proposed for astronomy applications. This DM consists of unimorph DM and piezoelectric actuators array. Compared with conventional DM, the composite piezoelectric DM has a characteristic of both large stroke and high bandwidth, which is suitable for correcting those aberrations introduced by atmospheric turbulence in real time. The prototype of the composite DM is prepared, and an adaptive optical testing system based on Shack-Hartmann sensor is established. Experimental results indicate that the woofer–tweeter DM has the capability to compensate for the first 20 terms of Zernike aberrations with normalized RMS wavefront errors less than 15%. The proposed composite piezoelectric DM has good performance and great potential in astronomical applications.
{"title":"A composite piezoelectric deformable mirror with woofer-tweeter configuration","authors":"Kaiye Bao, Licheng Yu, Jianqiang Ma","doi":"10.1117/12.3007361","DOIUrl":"https://doi.org/10.1117/12.3007361","url":null,"abstract":"A composite piezoelectric deformable mirror (DM) with woofer-tweeter configuration is proposed for astronomy applications. This DM consists of unimorph DM and piezoelectric actuators array. Compared with conventional DM, the composite piezoelectric DM has a characteristic of both large stroke and high bandwidth, which is suitable for correcting those aberrations introduced by atmospheric turbulence in real time. The prototype of the composite DM is prepared, and an adaptive optical testing system based on Shack-Hartmann sensor is established. Experimental results indicate that the woofer–tweeter DM has the capability to compensate for the first 20 terms of Zernike aberrations with normalized RMS wavefront errors less than 15%. The proposed composite piezoelectric DM has good performance and great potential in astronomical applications.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":"51 2","pages":"1296509 - 1296509-7"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138965155","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}
Silu Peng, Chaoyi Zhang, Jiayue Han, Chunyu Li, Hongxi Zhou, Jun Wang
Influenced by the prominent progress of two-dimensional (2D) layered crystals, the fabrication of 2D nanostructures from non-layered materials has attracted more and more attention. Lead selenide (PbSe) is one of the superior candidate materials for photodetector with suitable bandgap and outstanding photoelectric properties. The growth and device preparation of PbSe supply great interest for the development of high-performance infrared photodetectors. Although a lot of efforts have been paid on preparing PbSe nanostructures for miniaturized detectors, it is challenging to synthesize excellent crystallinity and thin 2D PbSe nanosheets because of itsinherent rock salt nonlayered structure. In this work, we employ a catalyst-free facile physical vapor deposition (PVD) method for controllable synthesis of PbSe nanosheets by van der Waals epitaxy technology. By optimizing the growth temperature, PbSe nanosheets from triangular pyramid island to square 2D plane can be obtained. In addition, the 2D PbSe nanosheets detector has a responsivity of 3.03 A/W at the wavelength of 520 nm with the power density of 5.05 mW/cm2. This work provides a facile strategy to synthesize high-quality 2D PbSe nanosheets which have enormous potentials to fabricate high-performance miniaturized photodetector.
{"title":"Catalyst-free physical vapor deposition of crystalline PbSe nanosheets for fabrication of high-performance photodetector","authors":"Silu Peng, Chaoyi Zhang, Jiayue Han, Chunyu Li, Hongxi Zhou, Jun Wang","doi":"10.1117/12.3007081","DOIUrl":"https://doi.org/10.1117/12.3007081","url":null,"abstract":"Influenced by the prominent progress of two-dimensional (2D) layered crystals, the fabrication of 2D nanostructures from non-layered materials has attracted more and more attention. Lead selenide (PbSe) is one of the superior candidate materials for photodetector with suitable bandgap and outstanding photoelectric properties. The growth and device preparation of PbSe supply great interest for the development of high-performance infrared photodetectors. Although a lot of efforts have been paid on preparing PbSe nanostructures for miniaturized detectors, it is challenging to synthesize excellent crystallinity and thin 2D PbSe nanosheets because of itsinherent rock salt nonlayered structure. In this work, we employ a catalyst-free facile physical vapor deposition (PVD) method for controllable synthesis of PbSe nanosheets by van der Waals epitaxy technology. By optimizing the growth temperature, PbSe nanosheets from triangular pyramid island to square 2D plane can be obtained. In addition, the 2D PbSe nanosheets detector has a responsivity of 3.03 A/W at the wavelength of 520 nm with the power density of 5.05 mW/cm2. This work provides a facile strategy to synthesize high-quality 2D PbSe nanosheets which have enormous potentials to fabricate high-performance miniaturized photodetector.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 5","pages":"129630M - 129630M-13"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994600","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 design a laser driver and temperature control circuit based on the Field Programmable Gate Array (FPGA). Vertical-Cavity Surface-Emitting Laser (VCSEL) is the core device of the nuclear magnetic resonance gyroscope (NMRG). The accuracy of the laser output wavelength greatly affect the detection accuracy of NMRG. In order to improve the accuracy of VCSEL in this application system, in this paper we research the working principle of the laser and analyze the relationship between the laser output wavelength, the driving current and the laser operating temperature through theoretical analysis. We design and built the laser driving and temperature control circuit by using constant current source and the MAX1978, which use FPGA as the main control chip. By setting different voltage values, the laser output corresponds to different wavelengths. We analyze the result of experiment and theoretical calculate through the spectrometer. The result shows that the current regulation error is better than 0.03mA. For the laser temperature control circuit, we used the LTSPICE to simulate the PID control circuit of the compensation loop ,the finally result is consistent with the expected results.
{"title":"Design of driving and temperature control circuitry for VCSEL","authors":"Yan Wang, Zhengguang Wang, Helun Song, Wenbo Han","doi":"10.1117/12.3004979","DOIUrl":"https://doi.org/10.1117/12.3004979","url":null,"abstract":"We design a laser driver and temperature control circuit based on the Field Programmable Gate Array (FPGA). Vertical-Cavity Surface-Emitting Laser (VCSEL) is the core device of the nuclear magnetic resonance gyroscope (NMRG). The accuracy of the laser output wavelength greatly affect the detection accuracy of NMRG. In order to improve the accuracy of VCSEL in this application system, in this paper we research the working principle of the laser and analyze the relationship between the laser output wavelength, the driving current and the laser operating temperature through theoretical analysis. We design and built the laser driving and temperature control circuit by using constant current source and the MAX1978, which use FPGA as the main control chip. By setting different voltage values, the laser output corresponds to different wavelengths. We analyze the result of experiment and theoretical calculate through the spectrometer. The result shows that the current regulation error is better than 0.03mA. For the laser temperature control circuit, we used the LTSPICE to simulate the PID control circuit of the compensation loop ,the finally result is consistent with the expected results.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 0","pages":"129590G - 129590G-6"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994627","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}
Jian L. Zhan, Yi G. Wu, Sheng Tao, Jing J. Xu, Han Wu, Bin Fan, Hai C. Wang, Bi C. Xia
With the development and progress of society and the acceleration of industry, transportation and urbanization, volatile organic compounds (Volatile Organic Compounds, VOCs) from extensive sources have increasingly prominent effects on the atmospheric environment, and some of them also have irritant, toxic and carcinogenic effects, posing a serious threat to the ecological environment and human health. As the source of energy in the national economy, the petrochemical industry is an important source of man-made VOCs leakage emissions, and has potential huge safety risks. This article reviews the definition of VOCs, source, hazard and traditional leakage detection method, investigate the progress and application of infrared detection technology at home and abroad, infrared detection technology with its non-contact, long distance, high efficiency, wide range, rapid positioning, dynamic intuitive significant advantages, can play an important role in the petrochemical VOCs detection.
{"title":"Overview of the application of VOCs gas leakage infrared thermal imaging technology in the field of petrochemical industry","authors":"Jian L. Zhan, Yi G. Wu, Sheng Tao, Jing J. Xu, Han Wu, Bin Fan, Hai C. Wang, Bi C. Xia","doi":"10.1117/12.3006687","DOIUrl":"https://doi.org/10.1117/12.3006687","url":null,"abstract":"With the development and progress of society and the acceleration of industry, transportation and urbanization, volatile organic compounds (Volatile Organic Compounds, VOCs) from extensive sources have increasingly prominent effects on the atmospheric environment, and some of them also have irritant, toxic and carcinogenic effects, posing a serious threat to the ecological environment and human health. As the source of energy in the national economy, the petrochemical industry is an important source of man-made VOCs leakage emissions, and has potential huge safety risks. This article reviews the definition of VOCs, source, hazard and traditional leakage detection method, investigate the progress and application of infrared detection technology at home and abroad, infrared detection technology with its non-contact, long distance, high efficiency, wide range, rapid positioning, dynamic intuitive significant advantages, can play an important role in the petrochemical VOCs detection.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 12","pages":"129600C - 129600C-22"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994786","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}
Laser active detection is a remote sensing technology that utilizes laser beams to detect various attributes of a target such as distance, orientation, height, and speed. The direct detection Signal-to-Noise Ratio (SNR) achieved by traditional array imaging systems is usually unsatisfactory because of different types of interferences, including backscattering effects and background noise. Related to this, the performance of existing methods for noise filtering are bounded by the classical detection signal-to-noise ratio. In particular, and there is no effective filtering method when the wavelength of the signal and noise is the same. To address this challenge, this study presents a novel approach to enhancing the Signal-to-Noise Ratio (SNR) of array imaging through the use of quantum state engineering. At the transmitter, we modulate the signal photons with orbital angular momentum to distinguish them from the photons of noise without orbital angular momentum. This modulation makes the signal and noise have differences in spatial intensity distribution. Due to this spatial difference, the signal and noise can be non-destructively separated after passing through the filter at the receiver, which gives enhanced SNR. The results show that this method can effectively filter out the noise with the same wavelength as the signal, and can improve the performance of array imaging detection.
{"title":"Enhanced signal-to-noise ratio of array imaging using quantum state engineering","authors":"Fan Jia, Zijing Zhang, Yuan Zhao","doi":"10.1117/12.3007663","DOIUrl":"https://doi.org/10.1117/12.3007663","url":null,"abstract":"Laser active detection is a remote sensing technology that utilizes laser beams to detect various attributes of a target such as distance, orientation, height, and speed. The direct detection Signal-to-Noise Ratio (SNR) achieved by traditional array imaging systems is usually unsatisfactory because of different types of interferences, including backscattering effects and background noise. Related to this, the performance of existing methods for noise filtering are bounded by the classical detection signal-to-noise ratio. In particular, and there is no effective filtering method when the wavelength of the signal and noise is the same. To address this challenge, this study presents a novel approach to enhancing the Signal-to-Noise Ratio (SNR) of array imaging through the use of quantum state engineering. At the transmitter, we modulate the signal photons with orbital angular momentum to distinguish them from the photons of noise without orbital angular momentum. This modulation makes the signal and noise have differences in spatial intensity distribution. Due to this spatial difference, the signal and noise can be non-destructively separated after passing through the filter at the receiver, which gives enhanced SNR. The results show that this method can effectively filter out the noise with the same wavelength as the signal, and can improve the performance of array imaging detection.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":" 1","pages":"129590U - 129590U-8"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994888","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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