Peiqi Yang;Mingju Xin;Yaopeng Wei;Chuanxin Teng;Ming Chen;Yu Cheng;Jun Yin;Libo Yuan;Shijie Deng
{"title":"A Compact Single-Pixel Spectral Measurement System","authors":"Peiqi Yang;Mingju Xin;Yaopeng Wei;Chuanxin Teng;Ming Chen;Yu Cheng;Jun Yin;Libo Yuan;Shijie Deng","doi":"10.1109/JPHOT.2024.3486223","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3486223","url":null,"abstract":"A compact single-pixel spectral measurement system based on semiconductor diodes is described in this work. There are no optical components in the system configuration, which contribute to reducing the size of the equipment. Incident spectra can be reconstructed by using the photocurrent of semiconductor diode and spectral response functions. After data collection, data analysis, algorithm processing and other steps.The existing equipment can accurately reconstruct the spectra of narrowband monochromatic light at 508–556 nm and broadband light sources in the 478–598 nm wavelength range, achieving high resolution of 6 nm broadband spectra. The peak signal-to-noise ratio (PSNR) of the reconstructed spectra can reach up to 33.44 dB.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10734238","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mode-Dependent Loss Equalized Few-Mode Fiber Photonic Lantern","authors":"Yingxuan Li;Senyu Zhang;Zhiyong Zhao;Jing Liu;Zhuyixiao Liu;Ming Tang","doi":"10.1109/JPHOT.2024.3485689","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3485689","url":null,"abstract":"We propose and fabricate an unconventional photonic lantern that is not only able to achieve mode multiplexing and demultiplexing, but also has the functionality of mode-dependent loss equalization. In the process of fusion splicing between the tail fiber of photonic lantern and the few-mode fiber, by controlling the fusion splicing parameters, a refractive index (RI) modified waveguide is formed at the fusion splicing region, through which the fundamental mode will have higher attenuation than the higher-order modes, which enables us to control the attenuation of different modes, so that we can customize the unconventional photonic lantern with different differential mode attenuation (DMA). Simulation has been carried out to investigate the dependence of DMA on the structure of the RI modified waveguide, and experiments have been implemented to investigate the dependence of DMA on discharge parameters, which matches well with the simulated tendency. In addition, CCD measurements of all three output ports have been performed on the fabricated devices, well-defined mode field patterns and high mode purity at the C-band can be observed. The proposed novel unconventional photonic lanterns open a new way to obtain simultaneous mode multiplexing / demultiplexing and mode-dependent loss equalization function, which will be greatly beneficial in the few-mode fiber transmission system.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10733746","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xin Jiang;Weilong Zhou;Wen Dong;Zhu Wang;Yifei Xie;Xinyue Tang;Zichun Le
{"title":"Laser Speckle Suppression in Augmented Reality Displays Based on Static and Low-Loss Polymer-Stabilized Liquid Crystal Screens","authors":"Xin Jiang;Weilong Zhou;Wen Dong;Zhu Wang;Yifei Xie;Xinyue Tang;Zichun Le","doi":"10.1109/JPHOT.2024.3483209","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3483209","url":null,"abstract":"Laser speckle caused by high coherence severely affects the image quality. The traditional optical approaches cannot effectively suppress speckles without compromising the coherence of the laser in the optical path. In this study, we develop a method in which a novel polymer-stabilized liquid crystal screen (PSLCS) was used to display images for efficient speckle suppression while preserving the coherence and high brightness of lasers. The scattering-induced fluctuations in the intensity of the light reflected from the PSLCS are evaluated to reveal decorrelation variation. The optimal parameters for suppressing speckles and obtaining a clear and high-resolution image via both laser projection and AR imaging are identified by adjusting the driving parameters. A speckle suppression efficiency of 67.34%, which exceeds that achieved by other similar methods, was achieved without using any additional optical elements. An experiment was implemented for verifying the performance of multi-plane AR imaging by a PSLCS, which, to our knowledge, is the first study to investigate the image quality and speckle suppression effect in AR imaging. The proposed cost-effective laser speckle suppression method enables high quality imaging, offering new possibilities for the application of LC-based optical materials and devices in display technology.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10721275","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of a Spatial Resolution-Enhanced Digital-Hologram Microscope With a Liquid Crystal Phase Modulator","authors":"Ha-Mong Shim;Ki-Dong Lim;Min-Kyu Park;Kwang-Hoon Lee;Jin Hyeok Kim;Sungjin Lim;Kyung-Il Joo","doi":"10.1109/JPHOT.2024.3481418","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3481418","url":null,"abstract":"We proposed a DHM system with improved spatial resolution compared with that of the polarized camera-based DHM system by employing a liquid crystal phase modulator (LCPM). The LCPM-based holographic interferometry optical system can reliably construct a four-step phase shifting scheme by changing the applied voltage, thus eliminating the need for mechanical moving parts. The spatial resolution characteristics of the proposed DHM system were analyzed using the 1951 USAF resolution target. These characteristics showed a fourfold improvement over the polarized camera-based DHM system. Additionally, the 3D information capturing capability of the proposed DHM system was experimentally confirmed using a via-hole array sample produced through the semiconductor fabrication process.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10720202","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluating Different Fluoride Glass Fibers and Topological Insulator BSTS Impact on Cortisol Sensing Utilizing SPR Sensor","authors":"Fatemeh Abrishamian;Hiroyasu Sone;Kazuya Takimoto;Fua Yoshida;Musashi Nitta","doi":"10.1109/JPHOT.2024.3480249","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3480249","url":null,"abstract":"The effects of different types of fluoride glass core fibers, from three main groups of fluorozirconate (ZrF\u0000<sub>4</sub>\u0000-based), fluoroaluminate (AlF\u0000<sub>3</sub>\u0000-based), and fluoroindate (InF\u0000<sub>3</sub>\u0000-based) fibers, were investigated in sensing salivary cortisol utilizing surface plasmon resonance (SPR) sensors. These sensors comprised multiple layers, including fluoride glass core, metal (Ag), dielectric, and dielectric grating (SiO\u0000<sub>2</sub>\u0000). The comparison was conducted to evaluate the sensor's figure of merit (FOM) and limit of detection (LOD) at 830 nm wavelength while optimizing the thickness of metal layer for different concentration of cortisol and keeping other parameters constant. The largest FOM of 20.83 RIU\u0000<sup>−1</sup>\u0000 was observed for the composition of IZBSC (40 InF\u0000<sub>3</sub>\u0000-20 ZnF\u0000<sub>2</sub>\u0000-15 BaF\u0000<sub>2</sub>\u0000-20 SrF\u0000<sub>2</sub>\u0000-5 CaF\u0000<sub>2</sub>\u0000) from InF\u0000<sub>3</sub>\u0000-based group, resulting in an exceptional LOD of 0.986 fg/mL with the intensity interrogation method. This represents a tremendous advancement compared to prior reported results. Furthermore, by implementing a topological insulator Bi\u0000<sub>1.5</sub>\u0000 Sb\u0000<sub>0.5</sub>\u0000 Te\u0000<sub>1.8</sub>\u0000 Se\u0000<sub>1.2</sub>\u0000 (BSTS) into this sensor with a ZBLAN fiber for the first time, the LOD was reduced to 0.54 fg/mL, demonstrating remarkable progress in cortisol sensing capability best to our knowledge.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10716781","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nonlinear Frequency Conversion of Dissipative Soliton Resonance Pulses Using the Second Harmonic Generation Effect","authors":"Piotr Bojęś;Piotr Jaworski;Karol Krzempek","doi":"10.1109/JPHOT.2024.3477718","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3477718","url":null,"abstract":"We present the first demonstration of using the second harmonic generation effect to upconvert dissipative soliton resonance laser pulses. We have designed and built two independent dissipative soliton resonance lasers, emitting rectangular shaped, nanosecond pulses in the 1.06 μm and 1.56 μm wavelength regime, respectively. Periodically poled lithium niobate crystals with appropriate periods were used as the nonlinear medium. Dissipative soliton resonance pulses with central wavelengths of 532 nm and 780 nm and pulse energies of 0.15 μJ and 0.02 μJ were generated as the result of the second harmonic generation effects. Conversion efficiencies of 30% and 4% were obtained for conversion of 1.06 μm and 1.56 μm pulses, respectively.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10713254","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Advancements in Underwater Optical Wireless Communication: Channel Modeling, PAPR Reduction, and Simulations With OFDM","authors":"Liwei Yang;Zeyang Bi;Xue Liang;Lihao Zhao;Jiade Zhang;Jingyi Peng","doi":"10.1109/JPHOT.2024.3475448","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3475448","url":null,"abstract":"Compared to underwater radio waves and acoustic communication technology, underwater optical communication technology has emerged as a technical means of underwater data and information transmission. Due to the complexity and volatility of the channel environment and the various factors that affect optical data transmission, there is no standard theoretical model for underwater optical wireless communication (UOWC). This work systematically evaluated and validated several optical attenuation models, leading to the development of an approach that significantly improves the accuracy of optical signal behavior prediction in underwater environments. The simulations using the Monte Carlo algorithm revealed critical insights into signal propagation, enabling more precise modeling of UOWC channels under varying conditions. We developed and validated a novel PTS-Clipping technique that effectively reduces PAPR by up to 15%, outperforming traditional methods and maintaining system efficiency. The novel PTS-Clipping approach achieved a reduction in OFDM signal PAPR from 11.861 dB to as low as 10.228 dB, demonstrating superior performance, particularly in high-order modulation schemes like 16-QAM, where signal integrity is critical. Theoretical analysis is combined with simulation experiments to promote a more robust and efficient UOWC system.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10713115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhiguo Yu;Donghe Tu;Wei Yan;Huan Guan;Lei Jiang;Xuejiao Sun;Zhiyong Li
{"title":"120 GHz Sub-2 V Thin-Film Lithium Niobate Modulators on Silicon Substrate Using Thick Capacitively Loaded Slow Wave Electrodes","authors":"Zhiguo Yu;Donghe Tu;Wei Yan;Huan Guan;Lei Jiang;Xuejiao Sun;Zhiyong Li","doi":"10.1109/JPHOT.2024.3477311","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3477311","url":null,"abstract":"Electro-optic modulators with large bandwidth and low voltage are crucial for the high-baud-rate digital communication and high-carrier-frequency analog links. Recently, thin-film lithium niobate (TFLN) modulators with sub-1 V voltage and 140 GHz bandwidth have been emerged on the low permittivity substrates, such as quartz. However, on the high permittivity environment, such as silicon substrates, the bandwidth dramatically reduced to below 100 GHz even if the voltage was raised to around 3 V. We break the voltage–bandwidth trade-off limit in TFLN modulators on silicon substrates using low inductance thick metal traveling wave electrodes, which reduce RF phase index and microwave losses while preserving high EO modulation efficiency. We demonstrate a TFLN EO modulator on silicon substrate with 3 dB EO bandwidth \u0000<inline-formula><tex-math>$>$</tex-math></inline-formula>\u0000 120 GHz and half-wave voltage \u0000<inline-formula><tex-math>$(V_pi) < $</tex-math></inline-formula>\u0000 2 V. Bandwidth/\u0000<inline-formula><tex-math>$V_pi$</tex-math></inline-formula>\u0000 reach 60, which is significantly larger than traditional TFLN modulators. The proposed thin-film lithium niobate modulators offers a practical solution for the hybrid integration of silicon and lithium niobate.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10711217","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142450992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Localizing Axial Dense Emitters Based on Single-Helix Point Spread Function and Deep Learning","authors":"Yihong Ji;Danni Chen;Hanzhe Wu;Gan Xiang;Heng Li;Bin Yu;Junle Qu","doi":"10.1109/JPHOT.2024.3476514","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3476514","url":null,"abstract":"The point-by point 3D scanning strategy adopted in Stimulated Emission Depletion Microscopy (STED) is time-consuming. The 3D scanning can be replaced with a 2D scanning in the non-diffracting Bessel-Bessel STED (BB-STED). In order to extract the excited emitters’ axial information in BB-STED, we propose to encode axial information by using a detection optical path with single-helix PSF, and then predict the depths of the emitters with deep learning. Simulation demonstrated that, for dense emitters in a depth range of 4 µm, an axial precision of ∼35 nm can be achieved. Our method also works for experimental data, and an axial precision of ∼63 nm can be achieved.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10709644","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"ESPGD Algorithm to Improve the Convergence Speed for Adaptive Single-Mode Fiber Coupling","authors":"Jinjin Peng;Bo Qi;Yun Zhang;ZhenChuang Li;Yao Mao","doi":"10.1109/JPHOT.2024.3476199","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3476199","url":null,"abstract":"The adaptive single-mode fiber (SMF) coupling technique is normally adopted since the coupling efficiency (CE) significantly determines the performance of the free-space optical communication (FSOC) systems. The stochastic parallel gradient descent (SPGD) algorithm is the most commonly used control algorithm in adaptive SMF fiber coupling system. This paper proposes an improved SPGD algorithm named estimation-based stochastic parallel gradient descent (ESPGD) algorithm to accelerate the sytem convergence when applied to a practical adaptive SMF coupling system based on fast steering mirror (FSM). Applying the perturbed voltages, FSM dynamic response and then recording the performance metrics is the basic and most time-consuming process in actual adaptive SMF coupling system control. The ESPGD algorithm uses a different gradient estimation method based on adaptive parameter estimation method. The algorithm only needs to perform this process once in one iteration while the original SPGD algorithm needs to perform it twice to obtain the estimated gradient. This greatly reduce the time consumed by one iteration of the algorithm, thereby reducing the convergence time. The simulation and experimental results show that the ESPGD algorithm reduces the system convergence time by nearly half when correcting static angular errors and more than doubles the control bandwidth when correcting sinusoidal angular jitters.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10707185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142517900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}