Optics letters最新文献_第8页

High-SNR OAM mode division multiplexing based on delta-sigma modulation using a power domain layer. 基于δ - σ调制的功率域层高信噪比OAM模分复用。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.566649

Sihan Wang, Xiaolong Pan, Ran Gao, Dong Guo, Huan Chang, Zhipei Li, Sitong Zhou, Cheng Du, Wei Yan, Fei Wang, Qi Zhang, Xiangjun Xin

{"title":"High-SNR OAM mode division multiplexing based on delta-sigma modulation using a power domain layer.","authors":"Sihan Wang, Xiaolong Pan, Ran Gao, Dong Guo, Huan Chang, Zhipei Li, Sitong Zhou, Cheng Du, Wei Yan, Fei Wang, Qi Zhang, Xiangjun Xin","doi":"10.1364/OL.566649","DOIUrl":"https://doi.org/10.1364/OL.566649","url":null,"abstract":"Orbital angular momentum (OAM) mode-division multiplexing (MDM) systems exist with mode cross talk, which requires high signal-to-noise ratio (SNR) to improve transmission performance. In this Letter, a novel, to the best of our knowledge, scheme, based on power domain layered delta-sigma modulation (PDL-DSM) was proposed, which composes a high-order signal into two low-order signals and quantizes them using two parallel DSMs. The transmission efficiency of the quantized signals is optimized by using power domain multiplexing, and the quantization noise of the high-power signals is eliminated to improve the overall SNR of the system. The experimental results show that the PDL-DSM scheme achieves the transmission of 65,536 QAM signals, and the bit error rate (BER) is below the hard-decision forward error correction (HD-FEC) threshold for -3 dBm and 5 dBm in two modes. Under the same experimental conditions, the PDL-DSM outperforms the multi-stage noise-shaping (MASH) scheme and the 2-bit DSM scheme in both OAM modes. The PDL-DSM scheme outperforms the MASH DSM scheme when transmitting 1,048,576 QAM and increases the receiver sensitivity by 3 dB at the HD-FEC threshold for OAM mode l = 3. Compared with the traditional 2-bit DSM scheme, the PDL-DSM scheme has a SNR gain of the recovered waveform with 15 dB.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4150-4153"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Logistic regression exploration of host-dopant compatibility in MR-TADF-based OLEDs. 基于mr - tadf的oled中主掺杂剂相容性的逻辑回归探索。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.568492

Haotian Yue, Shan Huang, Xiaoliu Guan, Yongxing Tian, Hanrui Su, Hongbo Shao, Qiang Zhang, Runda Guo, Lei Wang

{"title":"Logistic regression exploration of host-dopant compatibility in MR-TADF-based OLEDs.","authors":"Haotian Yue, Shan Huang, Xiaoliu Guan, Yongxing Tian, Hanrui Su, Hongbo Shao, Qiang Zhang, Runda Guo, Lei Wang","doi":"10.1364/OL.568492","DOIUrl":"https://doi.org/10.1364/OL.568492","url":null,"abstract":"The process of selecting an optimal host material for organic light-emitting diodes (OLEDs) based on multiple resonance thermally activated delayed fluorescence (MR-TADF) materials has remained time-consuming and resource-intensive. To accelerate this process, we utilize the MR-TADF material DtCzB-mDS from our previous work as the dopant, pairing it with 14 commonly used host materials from the literature to fabricate OLEDs for performance evaluation. Subsequently, we apply a logistic regression algorithm from machine learning to derive empirical formulas linking the host-dopant emissive system to key device performance metrics. The analysis of these formulas reveals correlations among the variables; for instance, the highest occupied molecular orbitals (HOMO) difference between the host and dopant shows a strong negative correlation with the highest external quantum efficiency (EQEmax) and luminance, with correlation coefficients of -0.67 and -0.54, respectively. Overall, this work offers valuable insights into optimizing host material selection for enhanced OLED performance.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4486-4489"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Low-loss thin-film periodically poled lithium niobate waveguides fabricated by femtosecond laser photolithography. 飞秒激光光刻技术制备低损耗薄膜周期性极化铌酸锂波导。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565825

Guanghui Zhao, Jintian Lin, Renhong Gao, Qifeng Hou, Jianglin Guan, Chuntao Li, Xinzhi Zheng, Minghui Li, Xiaochao Luo, Yingnuo Qiu, Lingling Qiao, Min Wang, Ya Cheng

{"title":"Low-loss thin-film periodically poled lithium niobate waveguides fabricated by femtosecond laser photolithography.","authors":"Guanghui Zhao, Jintian Lin, Renhong Gao, Qifeng Hou, Jianglin Guan, Chuntao Li, Xinzhi Zheng, Minghui Li, Xiaochao Luo, Yingnuo Qiu, Lingling Qiao, Min Wang, Ya Cheng","doi":"10.1364/OL.565825","DOIUrl":"https://doi.org/10.1364/OL.565825","url":null,"abstract":"Periodically poled lithium niobate on insulator (PPLNOI) ridge waveguides are essential photonic components for both classical and quantum information processing. However, dry etching of PPLNOI waveguides frequently generates rough sidewalls and variations in the etching rates of oppositely poled lithium niobate ferroelectric domains, leading to relatively high propagation losses (0.25-1 dB/cm), which significantly limits net conversion efficiency and hinders scalable photonic integration. In this work, a low-loss PPLNOI ridge waveguide with a length of 7 mm was fabricated using ultra-smooth sidewalls through photolithography-assisted chemo-mechanical etching followed by high-voltage pulse poling with low cost. The average surface roughness was measured to be only 0.27 nm, resulting in a record-low propagation loss of 0.11 dB/cm in PPLNOI waveguides. Highly efficient second harmonic generation was demonstrated with a normalized efficiency of 1643% W-1·cm-2 without temperature tuning, corresponding to a conversion efficiency of 805%/W, which is close to the best conversion efficiency reported in nanophotonic PPLNOI waveguide fabricated by expensive electron-beam lithography followed by dry etching, and the absolute conversion efficiency reached 15.7% at a pump level of 21.6 mW. The normalized efficiency can be even improved to 1742% W-1·cm-2 at the optimal temperature of 59οC.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4310-4313"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Mechanisms of luminous efficiency enhancement in micro-LEDs via pre-layer structure optimization. 通过层前结构优化提高微型led发光效率的机理。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564959

Shuhui Wang, Rongxing Wu, Shouqiang Lai, Yurong Dai, Yuhan Su, Xinqin Liao, Yijun Lv, Hao-Chung Kuo, Zhong Chen, Tingwei Lu, Tingzhu Wu

引用次数: 0

Poincaré sphere and Stokes parameters of orbital angular momentum wave based on Euler's formula. 基于欧拉公式的轨道角动量波的poincarcars球和Stokes参数。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.562261

Zhiwei Sun

引用次数: 0

Pure high-order dispersion dissipative Kerr solitons in optical cavities. 光学腔中纯高阶色散耗散克尔孤子。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564975

Carlo Silvestri, Y Long Qiang, Krupamaya Panda, Justin Widjaja, Stéphane Coen, C Martijn de Sterke, Antoine F J Runge

引用次数: 0

Real-time synthesis of twisted Gaussian Schell-model beams and their applications in suppressing the turbulence-induced scintillation and beam wander. 扭曲高斯-谢尔模型光束的实时合成及其在抑制湍流诱发闪烁和光束漂移中的应用。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564963

Haiyun Wang, Yakun Wang, Xiaofeng Peng, Lin Liu, Yangjian Cai, Fei Wang

引用次数: 0

Single-pixel shadowless imaging by a ring detector. 环形探测器的单像素无影成像。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564949

Zhong Ji, Hanyan Zhao, Jingyang Xing, Jingjing Liu, Hao Wang, Hongling Wan, Yujin Liu, Xueli Chen

{"title":"Single-pixel shadowless imaging by a ring detector.","authors":"Zhong Ji, Hanyan Zhao, Jingyang Xing, Jingjing Liu, Hao Wang, Hongling Wan, Yujin Liu, Xueli Chen","doi":"10.1364/OL.564949","DOIUrl":"https://doi.org/10.1364/OL.564949","url":null,"abstract":"Active single-pixel imaging technology has shown significant advantages in many fields. However, its dependence on a single light source often leads to shadow artifacts, which reduces the imaging quality. Inspired by surgical shadowless lamps, this study proposes an innovative solution based on a ring detector to overcome this limitation. Taking advantage of the fact that the field of view of active single-pixel imaging depends on the projected pattern area, we explored multiple methods to construct a ring detector consisting of eight detectors. Specifically, eight independent detectors capture images with different shadows, and the shadowless effect is achieved by signal and image superposition. A simpler method is to connect eight detectors in series or in parallel to achieve shadowless imaging in a single acquisition. In addition, we combine a large-area ring detector with an active Bayer-Fourier pattern to achieve shadowless color imaging. Through a simple restoration algorithm, we simplify data processing and successfully separate and reconstruct the red, green, and blue color components. We expect that this simple shadowless imaging technology will have a wide range of applications in fields such as medical imaging and industrial inspection.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4258-4261"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Broadband adiabatic power splitter on an etchless thin-film lithium niobate platform. 无蚀刻铌酸锂薄膜平台上的宽带绝热功率分配器。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565904

Yushu Fu, Shangrong Li, Shijie Sun, Xia Ning, Ziyu Zhou, Daming Zhang, Xibin Wang

引用次数: 0

Broadband frequency measurement system based on dynamic wavelength tuning synergistically combined with stimulated Brillouin scattering. 基于动态波长调谐与受激布里渊散射协同结合的宽带频率测量系统。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.568948

Shuai Zu, Ying Wang, Pengyuan Huang, Yiying Gu, Jingjing Hu, Mingshan Zhao

{"title":"Broadband frequency measurement system based on dynamic wavelength tuning synergistically combined with stimulated Brillouin scattering.","authors":"Shuai Zu, Ying Wang, Pengyuan Huang, Yiying Gu, Jingjing Hu, Mingshan Zhao","doi":"10.1364/OL.568948","DOIUrl":"https://doi.org/10.1364/OL.568948","url":null,"abstract":"This paper proposes and validates a broadband frequency measurement system based on dynamic wavelength tuning synergistically combined with stimulated Brillouin scattering (SBS). By integrating a laser wavelength tuning mechanism with dynamic matching of the Brillouin gain spectrum, a frequency-to-time mapping approach is implemented to achieve microwave frequency measurement covering 9-40 GHz. The root mean square error of the proposed method is experimentally validated to be 20 MHz. The system employs a low-frequency arbitrary waveform generator (AWG) to drive laser wavelength tuning, directly generating a 31 GHz bandwidth swept-frequency signal in the optical domain. Experimental results demonstrate that the system supports both single- and two-tone signal detection and realizes measurement range reconfiguration by adjusting local oscillator frequency. Compared with conventional schemes, this architecture achieves significant breakthroughs in measurement bandwidth, system cost, and reconfigurability, providing a novel, to the best of our knowledge, approach for broadband radio frequency detection.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4366-4369"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0