Applied Optics and Photonics China最新文献

{"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":null,"pages":null},"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}

{"title":"Dispersion-assisted scheme with optical self-interference cancellation and image rejection mixing","authors":"He Li, Zihang Zhu, Congrui Gao, Guodong Wang, Tao Zhou, Xuan Li, Qingqing Meng, Yi-Lin Zhou, Shanghong Zhao","doi":"10.1117/12.3005325","DOIUrl":"https://doi.org/10.1117/12.3005325","url":null,"abstract":"In this paper, a dispersion-assisted multi-functional scheme with compact structure and high cost-effectiveness based on microwave photonics is proposed. By virtue of the amplitude regulation mechanism of intermediate frequency signal induced by fiber dispersion, combined with the optical high-precision time delay matching, the image interference and the self-interference can be eliminated simultaneously. It avoids applying electrical tuning devices with lower precision and electrical couplers with limited bandwidth or extra optical filters which is beneficial to improve the system performance and compactness. It is also compatible with optical fiber transmission, which can be combined with radio over fiber technology to bring out the advantages of high spectrum utilization, distributed configuration and low loss transmission of in-band full-duplex radio over fiber systems.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994899","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}

{"title":"Production, characteristics, and biological effects of protonated small water clusters","authors":"Yixin Zhu","doi":"10.1117/12.3005480","DOIUrl":"https://doi.org/10.1117/12.3005480","url":null,"abstract":"Significance: The production and characteristics of protonated small water clusters (PSWCs) were reported in this work, where in electrospray ionization (ESI) of pure water, the species obtained were singly charged molecular ions consisting of 2, 3, 4 or 5 water molecules attached to a hydrogen ion, [(H2O)n+H]+ , where n = 2, 3, 4 or 5. We proposed a new type of PSWCs structure: 2, 3, 4, 5 water molecules wrapped around a hydrogen ion which is located at the electrical and geometric center, forming a very stable molecular structure. Furthermore, biological tests of the PSWCs on mitochondrial function of intestinal epithelial cells and liver cells in mice showed the better therapeutic effect on inflammatory bowel diseases compared to that of the biologic agent Infliximab. Aim: To produce stable PSWCs as a new source of nutrient for health. Approach: The PSWCs were produced by electrospray technology, and identified by an electrospray mass spectrometer. The biological effects of the PSWCs on mitochondrial function of intestinal epithelial cells and liver cells in mice are carefully checked. Results: The production, characteristics and the biological effects of the PSWCs are studied, that we first generate the PSWCs by electrospray mechanism, which is proved to be charged (with positive charge). The obtained PSWCs are composed of 2, 3, 4, 5 water molecules plus a proton, respectively. The test of biological effects shows that the PSWCs can reduce radicals and improve the cell functions, indicating very important biological functions of the PSWCs. Conclusions: PSWCs was successfully produced by electrospray technology in our lab, the produced PSWCs were very stable under normal conditions without any obvious concentration changes of hydrogen ions in the last 3 years after produced, even the water is heated to 100 degrees Celsius. Furthermore, the effect of PSWCs on mitochondrial function of intestinal epithelial cells and liver cells in mice showed that the therapeutic effect of PSWCs on inflammatory bowel disease was better than that of the biologic agent Infliximab, where the higher the concentration of hydrogen ions, the better the therapeutic effect is.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995375","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}

{"title":"BRDF modeling and analysis of the pseudo-invariant calibration site in northwest China","authors":"wenjie hu, Yuqing He, Xiuqing Hu, Jiabiao Zhu, Xingwei He","doi":"10.1117/12.3007854","DOIUrl":"https://doi.org/10.1117/12.3007854","url":null,"abstract":"As an important parameter characterizing the bi-directional reflectance of objects, the Bidirectional Reflectance Distribution Function (BRDF) is one of the key parameters in the on-orbit substitute calibration of satellite remote sensors based on stable ground targets. It is a crucial factor affecting the calibration accuracy. With the development of quantitative remote sensing, hyperspectral BRDF measurement for calibration and spectral analysis of land surface features has become increasingly important. Efficient and high-quality methods for collecting multi-angle reflectance data of land surfaces are currently a research focus. This study uses co-observation of two spectrometer to measure the BRDF characteristics of the pseudo-invariant calibration site in wild environment. Based on the selected results of the pseudo-invariant calibration site in Northwest China by previous research, BRDF for three different types of land surfaces were measured including desert, Gobi, and saline-alkali land. Based on the Ross-li kernel-driven model, a hyperspectral BRDF characteristic data set of the three different surface types is fitted, and the spatial distribution characteristics and hotspot effects of the BRDF directional reflection of the ground targets are analyzed. The results show that different surface types have different directional reflectance values and different hot spot effects. Therefore, a stable target radiation reference library with different radiation brightness levels can be constructed to provide a benchmark model for long-term consistent radiometric calibration of Chinese remote sensing satellites.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995625","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}

{"title":"Terahertz metamaterial narrowband absorber based on metal split ring","authors":"Xiaodi Ji, Hongyi Ge, Yuying Jiang, Xuyang Wu, Zhiyuan Jia, Zhenyu Sun","doi":"10.1117/12.3008045","DOIUrl":"https://doi.org/10.1117/12.3008045","url":null,"abstract":"Multi-band terahertz metamaterial absorbers offer new perspectives to achieve perfect absorption and multipoint information matching, which enable an ever-growing number of applications. In this study, a dual-band terahertz metamaterial absorber based on the metal split ring is designed. The absorber has perfect absorption peaks at 1.15 THz and 2.47 THz, and the absorption rate is more than 99%. The absorber produces a harp peak with a bandwidth of 0.008 at 2.47 THz, which has an extremely high quality factor of 308. The distribution of the electric field and surface current at two resonance points is analyzed using the finite element integration method. Through full wave simulation calculation, the maximum sensitivity of the analyte refractive index of the absorber is 400 GHz/RIU, and the maximum sensitivity of the thickness is 35 GHz/μm. The results show that the absorber can achieve highly sensitive detection of trace substances.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138963778","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}

{"title":"Simulation of thermal stress on soldering surface of conduction cooling end-pumped slat laser amplifier","authors":"Lu Chen, S. Bian, Lei Liu, Wentao Wang","doi":"10.1117/12.3011141","DOIUrl":"https://doi.org/10.1117/12.3011141","url":null,"abstract":"This paper introduces the thermal effect of the slab amplifying module in the high-energy solid-state laser, mainly simulates the influence of the thickness of the metal indium layer on the welding surface of the slab and the heat sink on the thermal effect of the slab, and analyzes the effect of different thicknesses of the indium layer on the thermal effect of the slab. The thickness of the metal indium layer used in the calculation is 10μm, 40μm and 80μm respectively. This paper provides a powerful reference for the engineering application of high-power and high-beam-quality all-solid-state laser systems.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138963785","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}

{"title":"Effect of multicomponent alloy coating on high frequency plasma ablation of diamond films","authors":"Dexian Pan, Kesheng Guo, Liping Liu, Senjie Zheng, Bin He, Lang Hu, Qiang Hu","doi":"10.1117/12.3005965","DOIUrl":"https://doi.org/10.1117/12.3005965","url":null,"abstract":"Diamond films have excellent transmittance from ultraviolet to far infrared, as well as excellent resistance to laser damage, mechanics, dust, rain, and other characteristics. Therefore, diamond films are used in aircraft infrared windows and supersonic flight missile hoods. The surface of supersonic aircraft can cause plasma ablation under intense aerodynamic heating. High temperature gas on the surface has strong vibration, dissociation, and ionization, resulting in many defects in the optical windows and protective covers on the outer surface of the aircraft, which may lead to deterioration of optical performance. In this thesis, microwave plasma chemical vapor deposition (MPCVD) method was used to synthesize high-quality diamond films using high-purity gas, while using magnetron sputtering to deposit multicomponent alloy coating as a protective layer to study the high-frequency plasma ablation effect of diamond films. Raman spectroscopy, visible-infrared transmittance spectra and field emission scanning electron microscopy was used to analyze the spectrum of diamond films before and after high-frequency plasma ablation. It was found that the multicomponent alloy coatings have good ablation resistance and high transmittance in the 1~4μm wavelength range, while the carbon and alloying components remain on the film surface. This research contributes to promoting the supersonic flight application of diamond films and provides data reference for the design of aircraft outer surface materials.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138964349","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}

{"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":null,"pages":null},"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}

{"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":null,"pages":null},"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}

{"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":null,"pages":null},"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}