Optics Communications最新文献_第7页

Polarization-Dependent Gain of vector-mode FM-EDFAs

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-03 DOI: 10.1016/j.optcom.2025.131827

Xinglu Jiang, Baojian Wu, Xinrui Jiang, Qiquan Wang, Feng Wen, Kun Qiu

{"title":"Polarization-Dependent Gain of vector-mode FM-EDFAs","authors":"Xinglu Jiang, Baojian Wu, Xinrui Jiang, Qiquan Wang, Feng Wen, Kun Qiu","doi":"10.1016/j.optcom.2025.131827","DOIUrl":"10.1016/j.optcom.2025.131827","url":null,"abstract":"<div><div>The transmission capacity of optical fiber communication can be effectively improved by the combination of dual-polarization (DP) signals with mode division multiplexing (MDM) technology. The polarization-dependent loss (PDL) of MDM systems and the polarization-dependent gain (PDG) of FM-EDFAs have a great influence on the transmission performance of DP signals. This paper employs the LP-mode diversity method to investigate the amplification characteristics of vector modes in FM-EDFAs, and compares it with the intensity model. It is demonstrated that the two methods may give the same calculation results only for the case of circularly symmetric mode pumping, that is, the computation based on the intensity model is no longer valid in the case of non-circularly symmetric mode pumping. Based on the LP-mode diversity method, we discuss the evolution of the transverse intensity distribution of vector modes in FM-EDFA, the mode combination types of DP signals, and the approaches to reducing PDG. PDG and DMG are reduced by optimizing both the pump modes and their power ratio. The LP-mode diversity method is not only applicable to vector mode amplification, but can also be used to analyze the characteristics in fiber transmission or amplification of vector beams, such as OAM modes.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131827"},"PeriodicalIF":2.2,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785359","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}

引用次数: 0

Mitigating fiber nonlinearity in multidimensional modulation-based optical communication systems by phase-conjugated twin waves technique

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-03 DOI: 10.1016/j.optcom.2025.131828

Mahdi S. Majeed , Jassim K. Hmood , Ghufran M. Hatem

{"title":"Mitigating fiber nonlinearity in multidimensional modulation-based optical communication systems by phase-conjugated twin waves technique","authors":"Mahdi S. Majeed , Jassim K. Hmood , Ghufran M. Hatem","doi":"10.1016/j.optcom.2025.131828","DOIUrl":"10.1016/j.optcom.2025.131828","url":null,"abstract":"<div><div>Next-generation optical networks must be flexible and efficiently utilize the available spectrum to enhance spectral efficiency and network capacity. Future optical transmission should adapt its bit rate and reach according to network demands by employing multidimensional modulation formats while maintaining low costs and complexity for practical implementation. In this paper, we utilize a phase-conjugated twin waves (PCTWs) technique to eliminate nonlinear phase noise (NLPN) in optical transmission systems that employ multidimensional modulation formats. Four-dimensional (4D) modulation formats, namely, Ball, Cluster, polarization-switched (PS)-quadrature phase shift keying (QPSK), and 32 set partitioning (32SP)-16 quadrature amplitude modulation (16QAM), are employed to modulate signals transmitted over long-haul fiber links. In the proposed system, the twin signals are spatially propagated over two similar optical links at a rate symbol rate of 20 Gsymbol/s. At the receiver, the PCTWs are recovered and then coherently combined for mitigating the effects of NLPN and improving a signal-to-noise ratio (SNR). The results indicate that the PCTWs technique enhances system performance for all four 4D modulation formats. Specifically, the achievable reaches is extended by 55 % for PS-QPSK, 48 % for 32SP-16QAM, 18 % for Custer, and 27 % for 8-Ball at a bit error rate (BER) of 10<sup>−3</sup>. Notably, the PCTWs technique considerably enhances the performance of PS-QPSK system, while the lowest improving is observed with the Cluster communication format when using the PCTWs technique.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131828"},"PeriodicalIF":2.2,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785360","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}

引用次数: 0

A local local oscillator passive continuous variable quantum key distribution scheme with trusted phase noise model and optical amplifiers

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-03 DOI: 10.1016/j.optcom.2025.131796

Xiaodong Wu , Duan Huang

引用次数: 0

Deep reinforcement learning hybrid models enabled broadband metamaterial solar absorbers optimization and design

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-02 DOI: 10.1016/j.optcom.2025.131824

Haobin Zhan , Xiaogen Yuan , Shuqin Wang , Xi Chen , Zexin Feng , Hu Cui , Jianping Guo

{"title":"Deep reinforcement learning hybrid models enabled broadband metamaterial solar absorbers optimization and design","authors":"Haobin Zhan , Xiaogen Yuan , Shuqin Wang , Xi Chen , Zexin Feng , Hu Cui , Jianping Guo","doi":"10.1016/j.optcom.2025.131824","DOIUrl":"10.1016/j.optcom.2025.131824","url":null,"abstract":"<div><div>Machine learning has revolutionized the design and optimization of metamaterial absorbers, yet existing approaches face notable challenges. Data-driven deep learning (DL) methods often require extensive datasets, limiting efficiency and hindering generalization beyond the training domain. Meanwhile, exploratory reinforcement learning (RL) methods eliminate the need for a preconstructed dataset but require extensive training time for exploration. In this study, we introduce, for the first time, an advanced hybrid model architecture, D-3DQN, combining DL and RL for the optimization of high performance metamaterial solar absorbers (MSAs). The proposed method integrates the fast training capabilities of DL with the exploratory advantages of RL, partially mitigating the time-consuming process of dataset acquisition, significantly reducing RL exploration time, and effectively addressing the generalization limitations of DL models beyond the dataset. Using this approach, we designed polarization-insensitive MSAs with average absorptivities of 98.51 % and 98.32 %, respectively, in the 0.4–2.8 μm wavelength range. Compared to using DL or RL models alone under the same conditions, the D-3DQN model reduced the design time by more than fivefold while delivering superior absorption performance. This method offers a novel design paradigm for high-performance metamaterial absorbers and can be extended to the design of other nanophotonic devices.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131824"},"PeriodicalIF":2.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785367","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}

引用次数: 0

Giant second-harmonic generation in rhombohedral transition metal dichalcogenide metasurfaces

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-02 DOI: 10.1016/j.optcom.2025.131825

Jiao Tang , Mingsheng Gao , Qing Zhang, Yuanjie Yang

引用次数: 0

Photonic spin Hall effect behavior of vortex beam in surface plasmon resonance

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-01 DOI: 10.1016/j.optcom.2025.131822

Zirui Qin , Zhongxu Zheng , Haoran Chen , Linjiao Ren , Pei Zhang , Rubin Qi , Qingfang Zhang , Jitao Zhang , Liying Jiang

{"title":"Photonic spin Hall effect behavior of vortex beam in surface plasmon resonance","authors":"Zirui Qin , Zhongxu Zheng , Haoran Chen , Linjiao Ren , Pei Zhang , Rubin Qi , Qingfang Zhang , Jitao Zhang , Liying Jiang","doi":"10.1016/j.optcom.2025.131822","DOIUrl":"10.1016/j.optcom.2025.131822","url":null,"abstract":"<div><div>Previous studies on surface plasmon resonance (SPR) enhanced photonic spin Hall effect (PSHE) have primarily focused on non-vortex beams. There is limited study on the PSHE behavior of vortex beams carrying rich intrinsic orbital angular momentum (IOAM) when SPR is excited. Based on this, we establish the PSHE model of vortex beam, and study the behavior and characteristics of all types of shift of vortex beams PSHE under SPR excitation. The specific composition of the in-plane and out-of-plane shifts of PSHE from the perspective of spin correlation, as well as their interrelationships with spin dependent and spin independent (Goos–Hänchen and Imbert–Fedorov) shifts, are unveiled. Some intriguing findings are obtained. In addition, this paper reveals the different effects of IOAM on each shift of PSHE, and elucidates the behavior characteristics of each shift under different topological charges. Furthermore, the reasons why each shift of PSHE is enhanced by SPR are explained. These research enable a systematic and deeper understanding of PSHE, and offer new inspirations for highly sensitive sensing and precise measurements based on SPR-PSHE, as well as new avenues for photon manipulation and spin-controlled in nanophotonics.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131822"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785357","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}

引用次数: 0

Reducing line edge roughness of laser heat-mode direct writing lithography using AOD scanning method

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-01 DOI: 10.1016/j.optcom.2025.131823

Bowen Chen , Zhihong Huang , Xiaozhong Xu , Jingsong Wei

{"title":"Reducing line edge roughness of laser heat-mode direct writing lithography using AOD scanning method","authors":"Bowen Chen , Zhihong Huang , Xiaozhong Xu , Jingsong Wei","doi":"10.1016/j.optcom.2025.131823","DOIUrl":"10.1016/j.optcom.2025.131823","url":null,"abstract":"<div><div>Line edge roughness (LER) is a critical parameter for evaluating the quality of micro-nano structure patterns. This paper proposes a method based on small pixel spacing exposure to reduce LER in laser heat-mode lithography. The simulation indicates that the reduction of LER can be achieved through smaller writing pixel spacing. Specifically, when the pixel spacing is reduced from 100 nm to 10 nm, the LER decreases by approximately 6 nm. To implement this, a laser heat-mode lithography system was developed with an acousto-optic deflector (AOD) as the light beam scanning element due to its high scanning accuracy, which enables pixel spacing as small as 6 nm. Additionally, to ensure pattern uniformity in the writing process, the compensation for AOD diffraction efficiency was first addressed. The variation in AOD diffraction efficiency is reduced from 63.94 % to 7.37 %. The experimental results show that LER can be effectively reduced from 14.58 nm to 9.34 nm when the pixel spacing reduces from 90 nm to 6 nm. The writing of arbitrary patterns validates the effectiveness of the method. This work provides an effective method for reducing LER in laser heat-mode direct writing lithography, paving the way for high quality pattern fabrication.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131823"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783765","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}

引用次数: 0

A highly fluorescent violet hue natural dye from Lagerstroemia speciosa: Excellent optical and photoluminescent properties for OLED and antioxidant activity applications

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-01 DOI: 10.1016/j.optcom.2025.131818

R. Chaithra, D. Harshitha, C.G. Renuka

{"title":"A highly fluorescent violet hue natural dye from Lagerstroemia speciosa: Excellent optical and photoluminescent properties for OLED and antioxidant activity applications","authors":"R. Chaithra, D. Harshitha, C.G. Renuka","doi":"10.1016/j.optcom.2025.131818","DOIUrl":"10.1016/j.optcom.2025.131818","url":null,"abstract":"<div><div>The present study uses different solvents to investigate the extraction of flavonoid dyes from Lagerstroemia speciosa flowers. The extracted dyes were analyzed for their carbon structure and phytochemical profile using NMR and LC-MS techniques, while FT-IR spectroscopy confirmed the presence of functional groups. The research also evaluated flavonoids' optoelectronic, fluorescence, and photometric properties. SEM-EDX analysis confirmed the chemical composition, with carbon as the predominant element. The optical characteristics of the methanol-extracted flavonoid show a narrow direct bandgap (Eg = 2.57 eV), a high refractive index (n = 1.54), a dielectric constant (<em>ε</em> = 12.123), and elevated optical conductivity (σ = 3.63 × 10^3 S/m). Flavonoids are known for their high quantum yield, significant lifetime, and pronounced Stokes shift, exhibiting strong violet emission with a spectrum from violet to blue colors. These properties make them valuable for organic LEDs and optoelectronic applications. Additionally, flavonoids help eliminate DPPH-free radicals, contributing to developing antioxidant green materials.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131818"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799892","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}

引用次数: 0

Generation and topological charge detection of multiple-vortex circular swallowtail tornado beams

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-01 DOI: 10.1016/j.optcom.2025.131788

Jiahao Guan, Zhenzhu Tong, Shaojie Xue, Hongling Yue, Xinyuan Qi

引用次数: 0

Microwave tunable metasurface with independent wide phase and large amplitude modulation for multifunctional beam control and RCS Reduction

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-01 DOI: 10.1016/j.optcom.2025.131817

Tian Yuan , Minhua Li , Tianyao Ling , Chao Shi , Hanru Shao , Jianfeng Dong , Libo Qian

{"title":"Microwave tunable metasurface with independent wide phase and large amplitude modulation for multifunctional beam control and RCS Reduction","authors":"Tian Yuan , Minhua Li , Tianyao Ling , Chao Shi , Hanru Shao , Jianfeng Dong , Libo Qian","doi":"10.1016/j.optcom.2025.131817","DOIUrl":"10.1016/j.optcom.2025.131817","url":null,"abstract":"<div><div>In this paper, a microwave tunable metasurface with independent control of amplitude and phase is proposed. It consists of a varactor diode loaded phase modulation layer, an air spacer, and a PIN diode loaded amplitude modulation layer, all of which are successively cascaded along electromagnetic (EM) propagation. By controlling the equivalent lumped parameters of varactor diodes and PIN diodes independently through bias voltages, modulation of the reflected wave is achieved with 180-degree dynamic phase range and 0.2–0.9 dynamic amplitude range from 4.59 to 4.97 GHz, both of which don't interfere with each other. Additionally, reflected waves under oblique incident angles is conducted to validate the robustness of the design. Designs with diversified lumped parameters and field distributions are further studied in detail. Based on the principle of encoded metasurfaces, three-beamforming, four-beamforming, and radar cross section (RCS) reduction structures are implemented. A 4 × 2 metasurface sample is fabricated and tested in rectangular waveguide, demonstrating the feasibility of this design strategy. This advancement provides new insights for the further development of multifunctional wireless communication systems and radar technologies.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131817"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769252","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}

引用次数: 0