Optics Communications最新文献_第6页

Discussions on line narrowing of self-injection locked diode lasers 自注入锁定二极管激光器缩线问题的探讨

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-07-01 DOI: 10.1016/j.optcom.2025.132184

Zujie Fang , Qingshuai Su , Fang Wei , Chen Chen , Haiwen Cai , Qing Ye

{"title":"Discussions on line narrowing of self-injection locked diode lasers","authors":"Zujie Fang , Qingshuai Su , Fang Wei , Chen Chen , Haiwen Cai , Qing Ye","doi":"10.1016/j.optcom.2025.132184","DOIUrl":"10.1016/j.optcom.2025.132184","url":null,"abstract":"<div><div>The narrow linewidth laser is one of the core devices in many important applications, especially in information technologies. The linewidth reduction effect of self-injection locked (SIL) laser and external cavity diode laser (ECDL) is one of the main research topics, which is usually described by two different formulas in the literature: one is with the differential over frequency of the phase of effective reflectivity, marked “<em>A</em>” and the differential of the amplitude of effective reflectivity, marked “<em>B</em>”. The feedback coefficient concerned widely in the field does not appear in the formula. The other contains the roundtrip time in the external cavity and the feedback coefficient; but suitable only for cases of weak feedbacks, and lacking quantity “<em>B</em>”. The purpose of this work is to understand the relation between the two models. A modified expression of linewidth reduction factor is obtained based on an improved rate equation, which is with a feedback coefficient suitable to high feedbacks and with quantity “<em>B</em>” involved. It is compatible with the preciously used formulas in different situations.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132184"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579490","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

Sensing using heralded single photons: An application towards ultra-sensitive temperature measurement 使用预示的单光子传感：在超灵敏温度测量中的应用

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-30 DOI: 10.1016/j.optcom.2025.132176

Ashok K. Sahu, Kanhu Ch Nayak, Sukanta K. Tripathy

{"title":"Sensing using heralded single photons: An application towards ultra-sensitive temperature measurement","authors":"Ashok K. Sahu, Kanhu Ch Nayak, Sukanta K. Tripathy","doi":"10.1016/j.optcom.2025.132176","DOIUrl":"10.1016/j.optcom.2025.132176","url":null,"abstract":"<div><div>A novel ultra-sensitive temperature sensor utilizing Heralded Single Photons (HSPs) is proposed and experimentally verified in this investigation. HSPs are crucial in various quantum technologies. The utilization of a heralded single-photon (HSP), as opposed to a classical light source, enables superior sensitivity in quantum sensing applications. This investigation focuses on the successful generating HSPs to design a highly sensitive quantum optical temperature sensor. The HSPs were produced from a PPKTP nonlinear crystal using the spontaneous parametric down-conversion process (SPDC) under the quasi-phase matching (QPM) condition. The signal and idler photons resulting from this process were transmitted through two different identical optical fibers and then to two identical single-photon detectors. The temporal properties of these photons were analyzed using a coincidence counter. A portion of the fiber carrying the signal was decladded to serve as the sensor probe. The sensor was calibrated by measuring the average transmittance with varying temperatures near the sensor probe. The sensing principle is explained deriving an expression for average transmittance as a function of temperature. The measurement error surpassed the Standard Quantum Limit (SQL), improving measurement sensitivity. The resolution and sensitivity of the developed quantum sensor were shown to be 0.0925 °C and 0.00677 /°C respectively. This study emphasizes the potential for enhancing sensitivity and minimizing shot noise with the use of HSPs. The merits of the proposed sensor, over the other quantum senor is its less complex design and low decoherence.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132176"},"PeriodicalIF":2.2,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536008","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

Design of a high-efficiency broadband solar absorber utilizing two-dimensional photonic crystals for enhanced solar energy harvesting 利用二维光子晶体增强太阳能收集的高效宽带太阳能吸收器的设计

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-30 DOI: 10.1016/j.optcom.2025.132178

Sichuan Liu , Gang Lin , Zhao Liu , Guoliang Yin

{"title":"Design of a high-efficiency broadband solar absorber utilizing two-dimensional photonic crystals for enhanced solar energy harvesting","authors":"Sichuan Liu , Gang Lin , Zhao Liu , Guoliang Yin","doi":"10.1016/j.optcom.2025.132178","DOIUrl":"10.1016/j.optcom.2025.132178","url":null,"abstract":"<div><div>An efficient broadband solar absorber can significantly enhance the system's solar absorption efficiency. Based on two-dimensional photonic crystal model, this article designs and proposes an efficient solar absorber, using finite-difference time-domain (FDTD) method. The complex structure of two-dimensional photonic crystals leads to multiple reflections of light waves during propagation, resulting in relatively high light absorption, making them widely used in the field of solar energy absorption. The absorber is constructed by using Ti as the substrate and periodically filling square three-dimensional cavities with SiO<sub>2</sub>. The average absorption rate achieves 94.37 %, with a weighted average absorption rate of 95.05 % under Air Mass 1.5(AM1.5) conditions (280-4000 nm). According to electric field analysis, the strong absorption of this model is mainly achieved through surface plasmon resonance absorption between SiO<sub>2</sub> solid columns and Ti substrates, as well as internal light wave interference resonance absorption in the SiO<sub>2</sub> solid column cavity.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132178"},"PeriodicalIF":2.2,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523690","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

TransFNet: A physics-enhanced transformer for speckle correlation imaging transfernet：用于散斑相关成像的物理增强变压器

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-28 DOI: 10.1016/j.optcom.2025.132126

Cheng Tang , Fei Wang , Zhiwei Tang , Yaping Chu , Guohai Situ

{"title":"TransFNet: A physics-enhanced transformer for speckle correlation imaging","authors":"Cheng Tang , Fei Wang , Zhiwei Tang , Yaping Chu , Guohai Situ","doi":"10.1016/j.optcom.2025.132126","DOIUrl":"10.1016/j.optcom.2025.132126","url":null,"abstract":"<div><div>Speckle correlation imaging (SCI) is an advanced computational imaging technique that leverages the optical memory effect to reconstruct images of hidden or obscured objects from scattered light. It offers several advantages, including low cost, high resolution, and real-time imaging capability. However, SCI fundamentally involves solving a phase retrieval problem, where existing algorithms often face trade-offs between image quality, scalability, and time efficiency. To address these challenges, we propose TransFNet, a physics-enhanced deep learning framework that integrates implicit priors from training data with explicit physical models of SCI. By combining data-driven pre-training with physics-driven fine-tuning, TransFNet effectively solves the phase retrieval task in SCI. The incorporation of Transformer blocks further enhances performance over conventional CNN-based architectures. Experimental results demonstrate that TransFNet achieves superior reconstruction quality and time efficiency, particularly on out-of-domain data. These finds showcase the potential of TransFNet for fast and scalable SCI applications such as none-line-of-sight (NLOS) imaging. The code is publicly available for non-commercial use.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132126"},"PeriodicalIF":2.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557379","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

Thin-Film Lithium Niobate (TFLN)-based multimode interference power splitter for multi-band operation 基于薄膜铌酸锂（TFLN）的多波段干扰功率分配器

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-28 DOI: 10.1016/j.optcom.2025.132169

Jia Li , Lei Wang , Ke Li , Zhiyuan Li , Chen Zhang

{"title":"Thin-Film Lithium Niobate (TFLN)-based multimode interference power splitter for multi-band operation","authors":"Jia Li , Lei Wang , Ke Li , Zhiyuan Li , Chen Zhang","doi":"10.1016/j.optcom.2025.132169","DOIUrl":"10.1016/j.optcom.2025.132169","url":null,"abstract":"<div><div>This article leverages thin-film lithium niobate (TFLN) with low dispersion material properties and the order selection in self-imaging effect by critical dimension optimization to reduce the wavelength sensitivity of multimode interference (MMI) power splitters. We experimentally demonstrated two types of multi-band 3 dB 1 × 2 MMI power splitters: the dual-band device achieving synchronous operation in both O-band (1260–1360 nm) and U-band (1620–1650 nm), and the ultra-broadband device covering the entire communication band from 1260 nm to 1675 nm. The fabrication processing of the devices is compatible with wafer-level mass production technology. The dual-band MMI achieves excess loss (EL) ≤ 1.8 dB and imbalance (IM) ≤ 0.33 dB in the O-band, while demonstrating EL ≤ 0.42 dB and IM ≤ 0.24 dB in the U-band. The ultra-broadband one maintains EL below 0.38 dB across 1240–1650 nm, achieving a bandwidth coverage of 410 nm. This research successfully addresses the longstanding challenge of combined multi-band operation, low-loss, and manufacturing compatibility in traditional material platform, while providing critical technological underpinnings for next-generation high-capacity optical communications and coordinated multi-band transmission architectures.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132169"},"PeriodicalIF":2.2,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536006","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

Interference pattern generation of optical third harmonic whispering gallery modes in microbubble resonators 微泡谐振器中光学三次谐波窃窃廊模式干涉图样的产生

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-28 DOI: 10.1016/j.optcom.2025.132130

Sheng Liu , Xing Niu , Yuxing Zhang , Liying Liu , Lei Xu

引用次数: 0

Influence of core-cladding interfacial stress on regeneration process of FBG and mechanism analysis 芯包层界面应力对光纤光栅再生过程的影响及机理分析

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-28 DOI: 10.1016/j.optcom.2025.132174

Zhiru Cui, Guisong Shao, Bing Song, Quan Chai, Shuo Liu, Jianzhong Zhang

引用次数: 0

Axial optical polarization skyrmion array within tightly focused fields by inversion of dipole antenna radiation 偶极子天线辐射反演紧聚焦场内的轴向光偏振skyrmion阵列

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-27 DOI: 10.1016/j.optcom.2025.132166

Sen Liu , Jiming Wang , Canghai Wang , Xiaorong Gu , Youwen Liu

{"title":"Axial optical polarization skyrmion array within tightly focused fields by inversion of dipole antenna radiation","authors":"Sen Liu , Jiming Wang , Canghai Wang , Xiaorong Gu , Youwen Liu","doi":"10.1016/j.optcom.2025.132166","DOIUrl":"10.1016/j.optcom.2025.132166","url":null,"abstract":"<div><div>Optical skyrmions have gained considerable interest for their robust electromagnetic field configurations. In this study, we demonstrate a novel method to generate axial optical polarization skyrmion structure, including continuous optical skyrmion structure in needle field (8λ) and discrete optical skyrmion array in multifocal field. By combining time-reversal dipole array radiation with vectorial tight-focusing techniques, we achieve controlled formation of both Néel-type and Bloch-type skyrmions. The spatial evolution of the topological structure within the axial optical needle field is examined, and the polarity of the optical skyrmion is periodically modulated by the axial electric field <em>E</em><sub><em>z</em></sub>. In the multifocal field, by introducing time-reversal magnetic dipole radiation, we achieve precise control over the skyrmion structures at any pair of focal points, thereby realizing the transformation from Néel-type to Bloch-type configurations. This work providing a theoretical foundation and contributes to the development of methods for constructing and regulating optical topological structures.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132166"},"PeriodicalIF":2.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513895","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

Effect of core chamfering on the loss of photonic band-gap fiber 芯倒角对光子带隙光纤损耗的影响

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-27 DOI: 10.1016/j.optcom.2025.132122

Yu Zhu , Fuyu Gao , Ningfang Song , Jiaqi Liu , Xiaobin Xu

引用次数: 0

The enhancement of high-order-harmonic generation in two-color laser field in fibonacci quasicrystals 双色激光场对斐波那契准晶体高次谐波产生的增强

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-27 DOI: 10.1016/j.optcom.2025.132135

Hai-Yan Sun, Ai-Yuan He, Guang-Xian Xiao, Chang-Long Xia

{"title":"The enhancement of high-order-harmonic generation in two-color laser field in fibonacci quasicrystals","authors":"Hai-Yan Sun, Ai-Yuan He, Guang-Xian Xiao, Chang-Long Xia","doi":"10.1016/j.optcom.2025.132135","DOIUrl":"10.1016/j.optcom.2025.132135","url":null,"abstract":"<div><div>High-order harmonic generation (HHG) from the Fibonacci quasicrystal system is investigated by solving the time-dependent Schrödinger equation (TDSE). The Fibonacci quasicrystal (FQ) has a fractal structure and appears many intersections on the band structure, which may provide more possible channels for HHG than that from crystals. Our simulation shows that the electron ionization is weaker for the top valence band (VB) states than that for the states from fractal energy bands in the middle of valence bands for a two-color field scheme. This is very different for electron excitation from the one-color scheme in Fibonacci quasicrystals or crystals. Compared with the one-color field scheme, the intensity of HHG is enhanced by <span><math><mrow><mn>3</mn><mo>∼</mo><mn>4</mn></mrow></math></span> orders in the case of the two-color field scheme. HHG from crystals could also be enhanced by two-color scheme, but the enhancement of the electron excitation usually comes from the states near the top of VB or resonance excitation channels. The fractal bands in FQ not only increase the ionization channels but also promote the generation of backscattering, thereby enhancing the electron distribution on the conduction band. Time-dependent population imaging (TDPI) is simulated to describe the microscopic dynamics of electrons and multiple channels from the intersection of fractal bands are proposed to explain the physical mechanism. The fractal band structure provides more sources of interference paths and may provide more information in harmonic spectra from the quasicrystal system for further investigation.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132135"},"PeriodicalIF":2.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557377","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