Pub Date : 2024-11-10DOI: 10.1016/j.optcom.2024.131300
Wilfried Blanc , Daniele Tosi , Arnaldo Leal-Junior , Maurizio Ferrari , John Ballato
The transparency of optical fibers is one of the most sought-after properties for this optical waveguide, the paradigmatic example being fibers for long-haul telecommunications. This transparency is achieved by eliminating absorbing centers and heterogeneities. So, the idea of deliberately introducing nanoparticles into the core of a fiber seems to go against the usual doxa, given the light scattering they induce. Such fibers, mainly based on silica glass, were first designed to modify luminescence properties to develop fiber lasers and amplifiers. For such applications, light scattering must be limited. However, over the last five years, light scattering has proved to be a valuable property for sensor applications. This review article is an opportunity to review the state of the art in nanoparticle-containing optical fibers, and to highlight their potential for laser and sensor applications.
{"title":"Are low- and high-loss glass–ceramic optical fibers possible game changers?","authors":"Wilfried Blanc , Daniele Tosi , Arnaldo Leal-Junior , Maurizio Ferrari , John Ballato","doi":"10.1016/j.optcom.2024.131300","DOIUrl":"10.1016/j.optcom.2024.131300","url":null,"abstract":"<div><div>The transparency of optical fibers is one of the most sought-after properties for this optical waveguide, the paradigmatic example being fibers for long-haul telecommunications. This transparency is achieved by eliminating absorbing centers and heterogeneities. So, the idea of deliberately introducing nanoparticles into the core of a fiber seems to go against the usual doxa, given the light scattering they induce. Such fibers, mainly based on silica glass, were first designed to modify luminescence properties to develop fiber lasers and amplifiers. For such applications, light scattering must be limited. However, over the last five years, light scattering has proved to be a valuable property for sensor applications. This review article is an opportunity to review the state of the art in nanoparticle-containing optical fibers, and to highlight their potential for laser and sensor applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131300"},"PeriodicalIF":2.2,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654663","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}
Pub Date : 2024-11-10DOI: 10.1016/j.optcom.2024.131272
Chenyuan Xu , Tingge Dai , Huangtao Wei , Meng Wang , Haoran Ma , Jianyi Yang , Xiaochen Luo , Yuehai Wang
As many silicon nanophotonic devices are polarization-dependent, a polarization beam splitter that divides TE and TM modes is an essential component for photonic integrated circuits. Various structures have been proposed for polarization splitters, but it is still challenging to simultaneously achieve low insertion loss, high extinction ratio, compact size and simplicity of fabrication. In this paper, we combine new machine learning methods with the principle of multimode interference to propose a novel design for a polarization beam splitter. Our design has low insertion loss (-0.17dB/-0.42dB) and high extinction ratio (-23.1dB/-23.4dB) at the central wavelength of 1550nm for TE/TM modes, with compact size of and fabrication constraints strictly satisfied. Furthermore, our design is a standard 220nm-thick single-layer device for the silicon-on-insulator platform, without any auxiliary structures, making it easy for fabrication. Since our design cannot be optimized by the most commonly used methods, we adopt several specialized techniques to Bayesian optimization for inverse design. In this paper, we also share these skills which are simple but effective, possible to solve much more complicated design problems than others.
{"title":"Improved inverse design of polarization splitter with advanced Bayesian optimization","authors":"Chenyuan Xu , Tingge Dai , Huangtao Wei , Meng Wang , Haoran Ma , Jianyi Yang , Xiaochen Luo , Yuehai Wang","doi":"10.1016/j.optcom.2024.131272","DOIUrl":"10.1016/j.optcom.2024.131272","url":null,"abstract":"<div><div>As many silicon nanophotonic devices are polarization-dependent, a polarization beam splitter that divides TE and TM modes is an essential component for photonic integrated circuits. Various structures have been proposed for polarization splitters, but it is still challenging to simultaneously achieve low insertion loss, high extinction ratio, compact size and simplicity of fabrication. In this paper, we combine new machine learning methods with the principle of multimode interference to propose a novel design for a polarization beam splitter. Our design has low insertion loss (-0.17dB/-0.42dB) and high extinction ratio (-23.1dB/-23.4dB) at the central wavelength of 1550nm for TE/TM modes, with compact size of <span><math><mrow><mn>2</mn><mo>×</mo><mn>19</mn><mi>μ</mi><msup><mrow><mi>m</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span> and fabrication constraints strictly satisfied. Furthermore, our design is a standard 220nm-thick single-layer device for the silicon-on-insulator platform, without any auxiliary structures, making it easy for fabrication. Since our design cannot be optimized by the most commonly used methods, we adopt several specialized techniques to Bayesian optimization for inverse design. In this paper, we also share these skills which are simple but effective, possible to solve much more complicated design problems than others.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131272"},"PeriodicalIF":2.2,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654666","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}
Pub Date : 2024-11-09DOI: 10.1016/j.optcom.2024.131298
Qihui Luo , Jian Ma , Yilan Chen , Tingting Lu , Junxuan Zhang , Haoda Ma , Xiaolei Zhu
A tunable blue-green vortex laser within a spectrum range of 476 nm–525 nm was firstly demonstrated from a β-Ba2BO4 (BBO) optical parametric oscillator (OPO), pumped by 355 nm vortex pulsed laser operating at 100 Hz repetition rate. The maximum output signal vortex pulse energy of 0.55 mJ at 495 nm wavelength was obtained, corresponding to a conversion efficiency of 14.2%. The transformation process of signal laser from a vortex beam to a Gaussian beam was illustrated by changing the curvature radius of the output mirror.
{"title":"Tunable blue-green vortex pulse laser emitting from an optical parametric oscillator","authors":"Qihui Luo , Jian Ma , Yilan Chen , Tingting Lu , Junxuan Zhang , Haoda Ma , Xiaolei Zhu","doi":"10.1016/j.optcom.2024.131298","DOIUrl":"10.1016/j.optcom.2024.131298","url":null,"abstract":"<div><div>A tunable blue-green vortex laser within a spectrum range of 476 nm–525 nm was firstly demonstrated from a β-Ba<sub>2</sub>BO<sub>4</sub> (BBO) optical parametric oscillator (OPO), pumped by 355 nm vortex pulsed laser operating at 100 Hz repetition rate. The maximum output signal vortex pulse energy of 0.55 mJ at 495 nm wavelength was obtained, corresponding to a conversion efficiency of 14.2%. The transformation process of signal laser from a vortex beam to a Gaussian beam was illustrated by changing the curvature radius of the output mirror.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131298"},"PeriodicalIF":2.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654591","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}
Pub Date : 2024-11-09DOI: 10.1016/j.optcom.2024.131297
Yi Wang , Baole Lu , Chenyue Lv , Hengyu Zhang , Qimeng Lin , Jintao Bai
This paper presents a hybrid mode-locked fiber laser based on the nonlinear polarization rotation (NPR) and the nanomaterial saturable absorber. Due to the presence of the NPR filter, we obtain L-band wavelength-switchable conventional solitons (CSs) and bound states (BSs). The tightly BSs and loosely BS, as well as the "2 + 1" type BS, are also experimentally observed. We study the formation of CSs and BSs by numerical simulations, the results of which are consistent with the experimental results. Our work deepens the understanding of the formation of BSs in hybrid mode-locked fiber lasers and provides new solutions for L-band light sources.
{"title":"L-band wavelength-switchable bound states in a hybrid mode-locked fiber laser","authors":"Yi Wang , Baole Lu , Chenyue Lv , Hengyu Zhang , Qimeng Lin , Jintao Bai","doi":"10.1016/j.optcom.2024.131297","DOIUrl":"10.1016/j.optcom.2024.131297","url":null,"abstract":"<div><div>This paper presents a hybrid mode-locked fiber laser based on the nonlinear polarization rotation (NPR) and the nanomaterial saturable absorber. Due to the presence of the NPR filter, we obtain L-band wavelength-switchable conventional solitons (CSs) and bound states (BSs). The tightly BSs and loosely BS, as well as the \"2 + 1\" type BS, are also experimentally observed. We study the formation of CSs and BSs by numerical simulations, the results of which are consistent with the experimental results. Our work deepens the understanding of the formation of BSs in hybrid mode-locked fiber lasers and provides new solutions for L-band light sources.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131297"},"PeriodicalIF":2.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654592","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}
Pub Date : 2024-11-09DOI: 10.1016/j.optcom.2024.131283
Qun Niu , Xinyu Cao , Shengyuan Fan , Qing-an Ding , Liuge Du , Huixin Liu , Ziyang Wang , Jinghao Lu
Effective parameter extraction without redundant experiments is a hot topic in the inverse design of lasers. A tandem model based on a generative adversarial network (GAN) has been proposed to accurately extract theoretical rate equation parameters of distributed feedback (DFB) lasers, avoiding the erroneous tendency caused by measurement accuracy and optimization algorithms. Cascading the deep neural network (DNN) with the GAN, the trained model can effectively extract parameters and construct forward model by solving rate equations numerically, which is more generalized and robust than the traditional network. The solution can breakthrough the potential boundaries and local optima encountered from the structure consisting of forward convolutional neural network (CNN) and particle swarm optimization (PSO) algorithms. Results demonstrate the presented model obviously addresses the demand of the substantial time and computational resources of traditional numerical solving methods, exhibits powerful convergence and its relative average error (RAE) is significantly improved with comparison to PSO–CNN under similar conditions. The extracted rate equation parameters can offer a more precise reference theoretically for the previous initialization of other extraction approaches, even the suggested neural network serves as a guidance for other optoelectronic devices design inversed.
无需冗余实验的有效参数提取是激光器逆向设计的热门话题。本文提出了一种基于生成对抗网络（GAN）的串联模型，用于精确提取分布式反馈（DFB）激光器的理论速率方程参数，避免了测量精度和优化算法造成的错误倾向。将深度神经网络（DNN）与 GAN 进行级联，训练出的模型能有效提取参数，并通过数值求解速率方程构建前向模型，比传统网络更具通用性和鲁棒性。与传统网络相比，该模型更具通用性和鲁棒性，其解决方案可以突破由前向卷积神经网络（CNN）和粒子群优化（PSO）算法组成的结构所遇到的潜在边界和局部最优。结果表明，所提出的模型明显解决了传统数值求解方法对大量时间和计算资源的需求，表现出强大的收敛性，在类似条件下，其相对平均误差（RAE）与 PSO-CNN 相比有了显著改善。所提取的速率方程参数可以为其他提取方法的初始化提供更精确的理论参考，甚至可以为其他光电器件的逆向设计提供指导。
{"title":"Parameter extraction method for assisting inverse design of DFB lasers based on rate equations and generative adversarial network","authors":"Qun Niu , Xinyu Cao , Shengyuan Fan , Qing-an Ding , Liuge Du , Huixin Liu , Ziyang Wang , Jinghao Lu","doi":"10.1016/j.optcom.2024.131283","DOIUrl":"10.1016/j.optcom.2024.131283","url":null,"abstract":"<div><div>Effective parameter extraction without redundant experiments is a hot topic in the inverse design of lasers. A tandem model based on a generative adversarial network (GAN) has been proposed to accurately extract theoretical rate equation parameters of distributed feedback (DFB) lasers, avoiding the erroneous tendency caused by measurement accuracy and optimization algorithms. Cascading the deep neural network (DNN) with the GAN, the trained model can effectively extract parameters and construct forward model by solving rate equations numerically, which is more generalized and robust than the traditional network. The solution can breakthrough the potential boundaries and local optima encountered from the structure consisting of forward convolutional neural network (CNN) and particle swarm optimization (PSO) algorithms. Results demonstrate the presented model obviously addresses the demand of the substantial time and computational resources of traditional numerical solving methods, exhibits powerful convergence and its relative average error (RAE) is significantly improved with comparison to PSO–CNN under similar conditions. The extracted rate equation parameters can offer a more precise reference theoretically for the previous initialization of other extraction approaches, even the suggested neural network serves as a guidance for other optoelectronic devices design inversed.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131283"},"PeriodicalIF":2.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654590","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}
Pub Date : 2024-11-09DOI: 10.1016/j.optcom.2024.131301
Yuemeng zhang , Kaiping Li , Jun Long, Ping Cai
Multi-wavelength digital holography extends the axial measurement range to the order of several tens of microns or more and makes the inspection of optical-rough objects and objects with steep slopes possible. As the optical-rough surface would superimpose speckle field on hologram, the existing focus evaluation criteria frequently fail in indicating correct reconstruction distance. This paper proposes a focus evaluation algorithm for focus detection of diffused surfaces. The average size of the speckle is used as the index and the average size of speckle is evaluated through morphological image processing. Two roughness specimens and a gear tooth are used as test pieces to validate the feasibility of the proposed method. Compared with the existing image focus evaluation method, the proposed morphological average size of speckle approach shows good robustness and sensitivity to various kinds of diffusing surface of mechanical parts.
{"title":"Speckle characteristic based auto-focusing approach for diffuse object in digital holography","authors":"Yuemeng zhang , Kaiping Li , Jun Long, Ping Cai","doi":"10.1016/j.optcom.2024.131301","DOIUrl":"10.1016/j.optcom.2024.131301","url":null,"abstract":"<div><div>Multi-wavelength digital holography extends the axial measurement range to the order of several tens of microns or more and makes the inspection of optical-rough objects and objects with steep slopes possible. As the optical-rough surface would superimpose speckle field on hologram, the existing focus evaluation criteria frequently fail in indicating correct reconstruction distance. This paper proposes a focus evaluation algorithm for focus detection of diffused surfaces. The average size of the speckle is used as the index and the average size of speckle is evaluated through morphological image processing. Two roughness specimens and a gear tooth are used as test pieces to validate the feasibility of the proposed method. Compared with the existing image focus evaluation method, the proposed morphological average size of speckle approach shows good robustness and sensitivity to various kinds of diffusing surface of mechanical parts.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131301"},"PeriodicalIF":2.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654512","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}
Pub Date : 2024-11-08DOI: 10.1016/j.optcom.2024.131289
Jun Shi , Ji-xin Yang , Yue Jiang , Miao Li , Feng Wang , Guo-hong Yang , Min-xi Wei , Ao Sun
X-ray diagnosis technology based on crystal diffraction is an important method to obtain key parameters in the research fields of X-ray spectroscopy diagnosis, material analysis and structural characterization on high-energy laser devices and synchrotron radiation devices. A Broadband high-resolution X-ray crystal spectrometer is proposed and built based on the principle of Rowland-Circle. This spectrometer is designed for measuring X-ray spectra across a wide spectral range(7.6keV–8.5 keV). The structure includes incorporating a curved quartz crystal as the diffraction and focusing element, along with an CMOS photon detector for spectrum detection from a Cu target X-ray tube. Experimental findings indicate that the X-ray crystal spectrometer can achieve spectral energy detection of 8027.8 eV(Kα2) and 8047.8eV (Kα1), the spectrometer's actual spectral resolution can exceed 2718@ Cu Kα1.
基于晶体衍射的 X 射线诊断技术是在高能激光装置和同步辐射装置上进行 X 射线光谱诊断、材料分析和结构表征等研究领域中获取关键参数的重要方法。根据 Rowland-Circle 原理提出并制造了一种宽带高分辨率 X 射线晶体光谱仪。该光谱仪设计用于测量宽光谱范围（7.6keV-8.5keV）的 X 射线光谱。其结构包括一个作为衍射和聚焦元件的弯曲石英晶体，以及一个用于从铜靶 X 射线管检测光谱的 CMOS 光子探测器。实验结果表明，X 射线晶体光谱仪可实现 8027.8 eV（Kα2）和 8047.8eV （Kα1）的光谱能量探测，光谱仪的实际光谱分辨率可超过 2718@ Cu Kα1。
{"title":"Development of a Broadband high-resolution X-ray spectrometer with new toroidally bent crystal","authors":"Jun Shi , Ji-xin Yang , Yue Jiang , Miao Li , Feng Wang , Guo-hong Yang , Min-xi Wei , Ao Sun","doi":"10.1016/j.optcom.2024.131289","DOIUrl":"10.1016/j.optcom.2024.131289","url":null,"abstract":"<div><div>X-ray diagnosis technology based on crystal diffraction is an important method to obtain key parameters in the research fields of X-ray spectroscopy diagnosis, material analysis and structural characterization on high-energy laser devices and synchrotron radiation devices. A Broadband high-resolution X-ray crystal spectrometer is proposed and built based on the principle of Rowland-Circle. This spectrometer is designed for measuring X-ray spectra across a wide spectral range(7.6keV–8.5 keV). The structure includes incorporating a curved quartz crystal as the diffraction and focusing element, along with an CMOS photon detector for spectrum detection from a Cu target X-ray tube. Experimental findings indicate that the X-ray crystal spectrometer can achieve spectral energy detection of 8027.8 eV(Kα2) and 8047.8eV (Kα1), the spectrometer's actual spectral resolution can exceed 2718@ Cu Kα1.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131289"},"PeriodicalIF":2.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654214","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}
Pub Date : 2024-11-08DOI: 10.1016/j.optcom.2024.131285
Qing Ma , Bin Yang , Fengrui Yan , Yanzi Sun , Jiandi Yuan , Qingping Li , Lanting Huang , Tingting Zhang , Qinghua Li
Phosphor with efficient and broad range emission is necessary for lighting applications. I-III-VI group quantum dots (QDs) have the advantages of non-toxic composition and large adjustable spectrum range, and have potential applications in the field of lighting. However, the efficient luminescence of these QDs at shorter wavelengths still needs further study, which is crucial for the development of high color rendering index white light LED devices (WLEDs). In this work, wide visible range emitting AgInS2/ZnS QDs with broad band and high luminous efficiency were obtained by altering the Ag/In ratios and Zn2+ inter-diffusion with cation of AgInS2. Photo-luminescent (PL) wavelength range of the obtained core-shell structured AgInS2/ZnS extended from 703 nm to 524 nm with high PL quantum yield (QY) and stability. The champion device based on the optimized AgInS2/ZnS QDs exhibits warm white light (correlated color temperature = 3652 K) characteristics with high color rendering index (CRI Ra) of 92.85 while maintaining excellent color stability under different driving currents. These properties are far superior to those of WLEDs with YAG phosphor.
{"title":"Simple synthesis of AgInS2/ZnS core/shell quantum dots with wide tunable emission wavelength for white light-emitting diodes","authors":"Qing Ma , Bin Yang , Fengrui Yan , Yanzi Sun , Jiandi Yuan , Qingping Li , Lanting Huang , Tingting Zhang , Qinghua Li","doi":"10.1016/j.optcom.2024.131285","DOIUrl":"10.1016/j.optcom.2024.131285","url":null,"abstract":"<div><div>Phosphor with efficient and broad range emission is necessary for lighting applications. I-III-VI group quantum dots (QDs) have the advantages of non-toxic composition and large adjustable spectrum range, and have potential applications in the field of lighting. However, the efficient luminescence of these QDs at shorter wavelengths still needs further study, which is crucial for the development of high color rendering index white light LED devices (WLEDs). In this work, wide visible range emitting AgInS<sub>2</sub>/ZnS QDs with broad band and high luminous efficiency were obtained by altering the Ag/In ratios and Zn<sup>2+</sup> inter-diffusion with cation of AgInS<sub>2</sub>. Photo-luminescent (PL) wavelength range of the obtained core-shell structured AgInS<sub>2</sub>/ZnS extended from 703 nm to 524 nm with high PL quantum yield (QY) and stability. The champion device based on the optimized AgInS<sub>2</sub>/ZnS QDs exhibits warm white light (correlated color temperature = 3652 K) characteristics with high color rendering index (CRI Ra) of 92.85 while maintaining excellent color stability under different driving currents. These properties are far superior to those of WLEDs with YAG phosphor.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131285"},"PeriodicalIF":2.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654596","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}
Pub Date : 2024-11-08DOI: 10.1016/j.optcom.2024.131282
Yanbo Wang , Keyan Dong , Yansong Song , Mingxu Piao , Bo Zhang , Lei Zhang , Gangqi Yan , Zonglin Liang , Tianci Liu , Xinhang Li
An infrared multi-spectral filter based on surface plasmon polaritons is proposed in this study. It is used to achieve optical filtering in the long-wave infrared range of 8–14 μm. After coupling with the plasma polaritons excited on the surface of Au film, the incident light propagates through periodic sub-wavelength through-holes. We analyzed the transmission characteristics of the filter with periodic sub-wavelength through-holes and its local field distribution using the Finite-Difference Time-Domain (FDTD), and carried out the tolerance analysis to demonstrate the possibility of large-scale and low-cost processing. The simulation results indicated that our proposed filter attained four spectral channels in the spectral range of 8–14 μm with peak energy transmittance up to about 60%, and wide tolerances as well as polarization-insensitive characteristics. Our proposed long-wave infrared filters can provide efficient and low-cost solutions for lightweight multi-spectral devices and all-weather detection.
{"title":"Long-wave infrared multi-spectral filter arrays based on surface plasma polaritons","authors":"Yanbo Wang , Keyan Dong , Yansong Song , Mingxu Piao , Bo Zhang , Lei Zhang , Gangqi Yan , Zonglin Liang , Tianci Liu , Xinhang Li","doi":"10.1016/j.optcom.2024.131282","DOIUrl":"10.1016/j.optcom.2024.131282","url":null,"abstract":"<div><div>An infrared multi-spectral filter based on surface plasmon polaritons is proposed in this study. It is used to achieve optical filtering in the long-wave infrared range of 8–14 μm. After coupling with the plasma polaritons excited on the surface of Au film, the incident light propagates through periodic sub-wavelength through-holes. We analyzed the transmission characteristics of the filter with periodic sub-wavelength through-holes and its local field distribution using the Finite-Difference Time-Domain (FDTD), and carried out the tolerance analysis to demonstrate the possibility of large-scale and low-cost processing. The simulation results indicated that our proposed filter attained four spectral channels in the spectral range of 8–14 μm with peak energy transmittance up to about 60%, and wide tolerances as well as polarization-insensitive characteristics. Our proposed long-wave infrared filters can provide efficient and low-cost solutions for lightweight multi-spectral devices and all-weather detection.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131282"},"PeriodicalIF":2.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654599","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}
Pub Date : 2024-11-08DOI: 10.1016/j.optcom.2024.131264
Guoping Lin, Xiangru Sun, Rui Wang
A versatile angled fiber coupling platform for magnesium fluoride whispering gallery mode resonators is used to investigate nonlinear frequency conversion across 1.5 and 2 bands. We characterize MgF microcavities of varying sizes (4.3 mm, 1.9 mm, and 0.73 mm in diameter), achieving quality factors up to at and at . In the telecom regime, we observe rich nonlinear phenomena including Kerr comb generation, Brillouin lasing, and Raman lasing. Extending to the 2 band, we demonstrate four-wave mixing in a sub-millimeter cavity, highlighting the platform’s potential for the 2 band mid-infrared nonlinear optics.
{"title":"Angled fiber-coupled MgF2 microcavities for nonlinear optics in 1.5 and 2μm bands","authors":"Guoping Lin, Xiangru Sun, Rui Wang","doi":"10.1016/j.optcom.2024.131264","DOIUrl":"10.1016/j.optcom.2024.131264","url":null,"abstract":"<div><div>A versatile angled fiber coupling platform for magnesium fluoride whispering gallery mode resonators is used to investigate nonlinear frequency conversion across 1.5 and 2 <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span> bands. We characterize MgF<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> microcavities of varying sizes (4.3 mm, 1.9 mm, and 0.73 mm in diameter), achieving quality factors up to <span><math><mrow><mn>2</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>9</mn></mrow></msup></mrow></math></span> at <span><math><mrow><mn>1</mn><mo>.</mo><mn>55</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> and <span><math><mrow><mn>5</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>8</mn></mrow></msup></mrow></math></span> at <span><math><mrow><mn>1</mn><mo>.</mo><mn>94</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>. In the telecom regime, we observe rich nonlinear phenomena including Kerr comb generation, Brillouin lasing, and Raman lasing. Extending to the 2 <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span> band, we demonstrate four-wave mixing in a sub-millimeter cavity, highlighting the platform’s potential for the 2 <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span> band mid-infrared nonlinear optics.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"575 ","pages":"Article 131264"},"PeriodicalIF":2.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654594","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}
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