Optics Communications最新文献

{"title":"Analytical study of the beam quality of a diode-pumped alkali laser with unstable resonator","authors":"Boris D. Barmashenko,&nbsp;Karol Waichman,&nbsp;Salman Rosenwaks","doi":"10.1016/j.optcom.2024.131191","DOIUrl":"10.1016/j.optcom.2024.131191","url":null,"abstract":"<div><div>Analytical model of Cs diode-pumped alkali laser with unstable confocal resonator is reported. Two of the parameters characterizing the quality of the output beam were studied: the axial luminous intensity in the far field and the power in the bucket (PIB). The far-field axial light intensity and PIB were compared with their values for a truncated Gaussian reference beam whose aperture was limited by the aperture of the large resonator mirror and 99% of the Gaussian beam energy passed through the aperture of this mirror. For large values of the unstable resonator magnification factor <em>m</em> &gt; 5, the far-field axial light intensity is approximately 40% larger than that of the Gaussian reference beam. Analysis of the PIB curves showed that for large <em>m</em> &gt; 5, the values of the integrated fractional encircled power within a sufficiently large diffraction angles for the unstable resonator exceed its values for the reference Gaussian beam.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using polarization sensitive SMLM to infer the interaction strength of dye-plasmonic nanosphere systems","authors":"T. Novák ,&nbsp;P. Bíró ,&nbsp;Gy. Ferenc ,&nbsp;D. Ungor ,&nbsp;E. Czvik ,&nbsp;Á. Deák ,&nbsp;L. Janovák ,&nbsp;M. Erdélyi","doi":"10.1016/j.optcom.2024.131147","DOIUrl":"10.1016/j.optcom.2024.131147","url":null,"abstract":"<div><div>Single-molecule microscopy is an effective tool for the characterization of fluorophore–plasmonic structure interaction. However, sophisticated evaluation is required as specific information is hidden in the emission. Here, we theoretically and experimentally investigated the emission polarization of rotationally mobile fluorophores near plasmonic Au–Ag alloy nanospheres. We developed an elaborate calculation based on the Mie theory, which considers the rotational mobility of dyes near spherical plasmonic nanoparticles of any size. Furthermore, we have created a simplified model that describes the emission’s degree of polarization within 10% accuracy in the case of small nanoparticles, when dipole approximation is valid. Our results indicate the close relation of the polarization degree of the emission, which can reach up to be <span><math><mrow><mo>∼</mo><mn>0</mn><mo>.</mo><mn>8</mn></mrow></math></span> in the resonant case, to fluorescence scattering. DNA-PAINT single-molecule localization microscopy experiments conducted using AF488 and Atto647N dyes revealed that the measured polarization degree distribution followed the tendency predicted by calculations.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transmitted wavefront testing of window glass with confocal photon-sieves radial-shearing interferometry based on deep learning","authors":"Jian Lin ,&nbsp;Junyong Zhang ,&nbsp;Yuni Zheng ,&nbsp;Xiaojun Ma","doi":"10.1016/j.optcom.2024.131179","DOIUrl":"10.1016/j.optcom.2024.131179","url":null,"abstract":"<div><div>Two photon sieves with different focal lengths were used to construct a radial shearing interferometer. A patch-based UNet approach was utilized to extract the central skeleton of interferogram, and then an iterative algorithm was applied for wavefront reconstruction. The transmitted wavefront of a window glass was measured with different detectors, and their results were consistent with the measurement of ZYGO interferometer. Compared to zone plate, photon sieves can suppress higher-order diffraction by reasonably designing the arrangement of small holes, thereby improving the signal-to-noise ratio of the interferogram. Moreover, photon sieves that is self-supporting and multifunctional by use of design and optimization has great application in wavefront sensing and interferometric imaging.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-sensitivity humidity sensor based on Mach-Zehnder interferometer in seven-core fiber","authors":"Min Shao ,&nbsp;Yang Yu ,&nbsp;Xinyuan Ma ,&nbsp;Haiwei Fu ,&nbsp;Wensong Zhang ,&nbsp;Qingqing Lu","doi":"10.1016/j.optcom.2024.131186","DOIUrl":"10.1016/j.optcom.2024.131186","url":null,"abstract":"<div><div>A Mach-Zehnder Interferometer (MZI) based on seven-core fiber (SCF) for humidity sensing is proposed and experimentally demonstrated. The MZI is formed by sandwiched a section of SCF in between two single mode fibers (SMFs), while a fiber taper and a brief multimode fiber (MMF) act as fiber couplers to excite and couple the intermodal interference in the SCF. The optical field distribution and coupling efficiency of the MZI with different SCF lengths are analysed. The theoretical results show that the MZI is sensitive to SCF lengths, and it is expected to obtain highly sensitive humidity response. Humidity sensing experiments shows a high sensitivity of 0.6603 nm/%RH over a relative humidity (RH) range of 44–83 %RH, and the maximum measurement uncertainty introduced by the long-term stability is 0.0006 %RH. Human respiration measurement exhibits the response time and recovery time of the MZI are 0.44 s and 1.24 s respectively. The temperature effect is also experimentally investigated. Such an all-fiber MZI presents advantages of simple configuration, high sensitivity and good stability, making it has potential in humidity measurement fields.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-Newtonian binary pulse interaction in a Mamyshev oscillator","authors":"Hervé Leblond,&nbsp;Florent Bessin,&nbsp;François Sanchez","doi":"10.1016/j.optcom.2024.131164","DOIUrl":"10.1016/j.optcom.2024.131164","url":null,"abstract":"<div><div>We consider the propagation and binary interactions of optical pulses in an anomalous dispersion Mamyshev oscillator modeled by means of nonlinear Schrödinger equations. Two eigenpulses with different profile and energy can propagate in the cavity. It is found that pulse interaction in the Mamyshev oscillator strongly differs from particle interaction through a potential: the interaction determines the relative pulse velocity, which remains unchanged when pulse separation varies.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elliptically polarized high-order harmonic generation from N2-CO mixed gases","authors":"Tianxin Ou ,&nbsp;Feng Wang ,&nbsp;Hua Yuan ,&nbsp;Chunhui Yang ,&nbsp;Jiahang Song ,&nbsp;Qing Liao","doi":"10.1016/j.optcom.2024.131183","DOIUrl":"10.1016/j.optcom.2024.131183","url":null,"abstract":"<div><div>We theoretically study the elliptically polarized high-order harmonic generation from N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>-CO mixed gases. Our simulations show that the polarization of HHG is highly sensitive to both the mixing ratio and molecular alignment angle. In particular, even a small addition of CO gas results in a significant enhancement of harmonic ellipticity compared to pure N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> gas. Under a proper mixing ratio and molecular alignment angle, a large ellipticity of HHG is observed, which is larger than that in reported N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>-Ar mixture. Furthermore, when considering the molecular alignment effect, the dependence of ellipticity of HHG on mixing ratio exhibits slight variations. These findings pave the way for generating elliptically polarized extreme ultraviolet pulses.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantum photonic communications with four-dimensional constellations of coherent states undergoing phase noise","authors":"Arturo Arvizu-Mondragón ,&nbsp;Francisco J. Mendieta-Jiménez ,&nbsp;César A. López-Mercado ,&nbsp;Ramón Muraoka-Espíritu","doi":"10.1016/j.optcom.2024.131158","DOIUrl":"10.1016/j.optcom.2024.131158","url":null,"abstract":"<div><div>We present the analysis of the quantum detection of modulated coherent states used in quantum communications systems that employ the degrees of freedom of both the complex amplitude and the state of polarization of the optical carrier, in the presence of optical phase fluctuations, unavoidable in realistic laser fields as optical sources in photonic communications.</div><div>We analyze several photonic M-ary constellations with different four-dimensional (4D) formats with joint modulation of the field quadratures and the states of polarization of quantum coherent states affected by optical phase noise, of interest in quantum photonic communications, cryptography, and other applications.</div><div>For the quantum state detection/discrimination at the receiver, we employ the square root method (SRM) for the received phase-diffused 4D constellations, constituted by a set of mixed quantum coherent states, and arrive at results on their performance in error probability, as well as their mutual information, spectral and photon number efficiencies.</div><div>We find that the overall performances of our 4D Polarization-Shifted and Polarization-Multiplexed constellations are better than those of their single polarization counterparts; also, our binary and quaternary Phase-Shift-Keying formats perform better than the On-Off-Keying and Pulse-Position-Modulation schemes, with a trade-off with their sensitivity to phase noise, which is quantified in our analysis.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Q fano resonance metasurface sensor for refractive index and methane gas concentration measurement","authors":"Wenxing Xiao ,&nbsp;Xinye Fan ,&nbsp;Yanling Wang ,&nbsp;Wenjing Fang ,&nbsp;Fangxin Sun ,&nbsp;Jingjing Zhao ,&nbsp;Xin Wei ,&nbsp;Chuanchuan Li ,&nbsp;Jifang Tao ,&nbsp;Santosh Kumar","doi":"10.1016/j.optcom.2024.131187","DOIUrl":"10.1016/j.optcom.2024.131187","url":null,"abstract":"<div><div>High-quality-factor Fano resonances excited by metasurfaces have been playing an important role in the field of optical sensing. A high-performance sensor for refractive index and methane concentration measurement is designed and prepared in this paper. The symmetry of the structure is broken by altering the size of the rectangular holes in the tetramer, resulting fano resonance Q-factor of 34176 and modulation depth of 100%. The finite-difference time-domain (FDTD) method is used to simulate the structure. The results show that the refractive index and methane concentration sensitivity are 325 nm/RIU and −1.44 nm/%, respectively. The <em>FOM</em> can achieve 10156 RIU⁻¹. Furthermore, experiments are carried out on the gas application of the structure and the sensitivity of methane concentration is −1.03 nm/%. Therefore, the proposed metasurface has more practical and feasible significance in background refractive index and gas environment monitoring.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On-orbit spectral characteristics analysis of the greenhouse gases monitoring instrument: Spectral wavelength stability and instrumental line shape stability","authors":"Yunfei Han ,&nbsp;Hailiang Shi ,&nbsp;Zhiwei Li ,&nbsp;Haiyan Luo ,&nbsp;Xianhua Wang ,&nbsp;Hanhan Ye ,&nbsp;Yi Ding ,&nbsp;Feng Zhu ,&nbsp;Shichao Wu ,&nbsp;Wei Xiong","doi":"10.1016/j.optcom.2024.131170","DOIUrl":"10.1016/j.optcom.2024.131170","url":null,"abstract":"<div><div>The Greenhouse Gases Monitoring Instrument (GMI) is a carbon satellite payload developed based on the principle of spatial heterodyne spectroscopy technology, which is specifically designed for the global analysis of greenhouse gases (CO₂ and CH₄) “sources” and “sinks”. Due to the low concentration and minimal gradient variations of CO₂ and CH₄ in the atmosphere, higher precision is required for their retrieval. Vibrations during satellite launch and harsh space environments during on-orbit operation may cause changes in the performance of various payload components, resulting in decreased quality of spectrum products and retrieval precision. This paper proposes a set of on-orbit spectral characteristic evaluation methods tailored for the GMI to monitor the quality of its spectrum. It also develops an adaptive blind pixel detection and correction algorithm specifically for the GMI and optimizes the interferogram processing flow algorithm. On-orbit spectral calibration is performed, and methods to evaluate spectral characteristic parameters have been established. The analysis focuses on the variations of the spectral characteristics in the CO₂-1 bands (1.575 μm) of the GMI during one-year of on-orbit calibration spectrum. The initial spectral wavenumber offset is 0.133 cm⁻¹ after entering orbit, and the average spectral wavenumber offset is 0.0313 cm⁻¹ during stable operation. During the one-year period, the maximum variation in the instrumental line shape function of the GMI is 0.006 cm⁻¹. The observed spectrum obtained in nadir observation mode, underwent to accuracy verification. The results demonstrate consistency between the spectral peak wavenumbers and the relative trend changes of the observed and theoretical spectrum, with an average relative residual of 0.987%.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic switch between BIC and quasi-BIC supported by the electro-optic metasurface","authors":"Haiyi Tian ,&nbsp;Jiahao Li ,&nbsp;Yunkai Wu ,&nbsp;Xu Wang","doi":"10.1016/j.optcom.2024.131181","DOIUrl":"10.1016/j.optcom.2024.131181","url":null,"abstract":"<div><div>The bound states in the continuum (BICs) inspired mechanism of light localization makes it possible to realize high-Q quasi-BICs metasurface, and can be better applied to dynamic modulation and reconfigurable optical devices. In electro-optic modulation, the refractive index of the material is shifted under applied voltage, which has high stability and high response speed, and is very suitable for dynamic metasurfaces. In this work, a metasurface platform based on permittivity-asymmetry breaks the limit on the lowest achievable geometrical asymmetry of nano-fabrication or the ultra-high electro-optical coefficients of building materials compared to the previously proposed dynamic electro-optical metasurfaces. A delicate design of double-grating BaTiO₃ metasurface was presented that the long nanostripes of the periodic grating structure act as a bridge between the internal structure and the external environment. Subtle external environmental disturbances are introduced into the internal nanostructure through the long nanostripes, breaking the symmetry of the original metasurface, and the quasi-BICs can be triggered to generate an extremely high-Q optical signal response. To illustrate the concept of this platform, a barium titanate electro-optic metasurface that can reach a Q-factor of 10⁵ under the applied electric field of 2 kV/mm was designed and demonstrated through simulation. The platform developed in this study will become a promising platform for integrated optics, information optics, bio-optics, topological optics, and nonlinear optics.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}