Photonics最新文献_第9页

Tailoring the Direct Current Modulation Response of Electrically Pumped Semiconductor Nano-Laser Arrays 定制电泵半导体纳米激光器阵列的直流调制响应

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-14 DOI: 10.3390/photonics10121373

Yuanlong Fan, Siyi An, K. A. Shore, Xiaopeng Shao

{"title":"Tailoring the Direct Current Modulation Response of Electrically Pumped Semiconductor Nano-Laser Arrays","authors":"Yuanlong Fan, Siyi An, K. A. Shore, Xiaopeng Shao","doi":"10.3390/photonics10121373","DOIUrl":"https://doi.org/10.3390/photonics10121373","url":null,"abstract":"Semiconductor nano-lasers have been a topic of interest from the perspective of advancing the capabilities of photonic integration. Nano-lasers are perceived as the means to achieve improved functionality in photonic integrated circuits. The properties and performance of nano-lasers have been examined by means of simulations and laboratory measurements. Nano-lasers lend themselves to integration to form dense arrays in both one and two dimensions. In a recent work, a theoretical treatment was presented for the dynamic behaviour of stand-alone electrically pumped nano-laser arrays. In this work, the response of nano-laser arrays to direct current modulation is examined. As in previous works, attention is given to two prototype array geometries: a linear three-element linear array and an equilateral triangular array. Large one-dimensional arrays can be built by repeating this elementary linear array. Two-dimensional photonic integrated circuits can incorporate the triangular arrays studied here. Such prototypical configurations offer opportunities to tailor the modulation response of the nano-laser arrays. The principal factors which provide that capability are the coupling strengths between lasers in the arrays and the direct modulation parameters. The former are fixed at the design and manufacture stage of the array whilst the latter can be chosen. In addition, the enhancement of the spontaneous emission rate via the so-called Purcell effect in nano-lasers offers a device-specific means for accessing a range of modulation responses. Two-dimensional portraits of the regimes of differing modulation responses offer a convenient means for determining the dynamics that may be accessed by varying the laser drive current. It is shown by these means that a rich variety of modulation responses can be accessed in both linear and triangular arrays.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":"131 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138975479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Structural Optimization and Temperature Compensation of GMM-FBG Fiber Current Transducer GMM-FBG 光纤电流传感器的结构优化和温度补偿

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-14 DOI: 10.3390/photonics10121376

Wei-Chao Zhang, Lin-Heng Li, Tao Zhang

{"title":"Structural Optimization and Temperature Compensation of GMM-FBG Fiber Current Transducer","authors":"Wei-Chao Zhang, Lin-Heng Li, Tao Zhang","doi":"10.3390/photonics10121376","DOIUrl":"https://doi.org/10.3390/photonics10121376","url":null,"abstract":"In order to improve the sensitivity and accuracy of the giant magnetostrictive material-fiber Bragg gratings’ (GMM-FBG) current sensor, in which the magnetostrictive modulator is Terfenol-D, the temperature effects on the FBG center wavelength and GMM magnetostriction coefficient are investigated to initiate an amending scheme in which temperature parameters are introduced into a GMM-FBG sensing model so as to calibrate current values. Based on electromagnetism theory, the magnetic structure is optimized in design to significantly increase the magnetic coupling efficiency and to homogenize magnetic distribution, employing finite element simulations of the electromagnetic field. The relevant experimental platform is constructed with a wavelength demodulation system. At the temperature range of 20~70 °C, response amplitudes of the current sensor are tested under various current values. The experimental results indicate that the sensitivity of the GMM-FBG current sensor decreases with the temperature increment and is also positively correlated to the target current. Through analyzing the response characteristics of the current sensor to temperature variation, a reasonable GMM-FBG sensing amelioration model with a temperature compensation coefficient is established based on a mathematical fitting method, according to which the current detecting accuracy can be increased by 4.8% while measuring 60 A current at the representative working temperature of 40 °C.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":"1 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138972620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Propagation Properties of Generalized Schell-Model Pulse Sources in Dispersive Media 广义谢尔模型脉冲源在分散介质中的传播特性

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-14 DOI: 10.3390/photonics10121378

Xiayin Liu, Zhiyu Cai, Xiaogang Wang, Bijun Xu

引用次数: 0

Refining the Performance of mid-IR CPA Laser Systems Based on Fe-Doped Chalcogenides for Nonlinear Photonics 改进基于掺铁卤化物的中红外 CPA 激光系统的性能，用于非线性光子学

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-14 DOI: 10.3390/photonics10121375

A. Pushkin, F. Potemkin

{"title":"Refining the Performance of mid-IR CPA Laser Systems Based on Fe-Doped Chalcogenides for Nonlinear Photonics","authors":"A. Pushkin, F. Potemkin","doi":"10.3390/photonics10121375","DOIUrl":"https://doi.org/10.3390/photonics10121375","url":null,"abstract":"The chirped pulse amplification (CPA) systems based on transition-metal-ion-doped chalcogenide crystals are promising powerful ultrafast laser sources providing access to sub-TW laser pulses in the mid-IR region, which are highly relevant for essential scientific and technological tasks, including high-field physics and attosecond science. The only way to obtain high-peak power few-cycle pulses is through efficient laser amplification, maintaining the gain bandwidth ultrabroad. In this paper, we report on the approaches for mid-IR broadband laser pulse energy scaling and the broadening of the gain bandwidth of iron-doped chalcogenide crystals. The multi-pass chirped pulse amplification in the Fe:ZnSe crystal with 100 mJ level nanosecond optical pumping provided more than 10 mJ of output energy at 4.6 μm. The broadband amplification in the Fe:ZnS crystal in the vicinity of 3.7 μm supports a gain band of more than 300 nm (FWHM). Spectral synthesis combining Fe:ZnSe and Fe:CdSe gain media allows the increase in the gain band (~500 nm (FWHM)) compared to using a single active element, thus opening the route to direct few-cycle laser pulse generation in the prospective mid-IR spectral range. The features of the nonlinear response of carbon nanotubes in the mid-IR range are investigated, including photoinduced absorption under 4.6 μm excitation. The study intends to expand the capabilities and improve the output characteristics of high-power mid-IR laser systems.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":"22 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138972404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Polarization-Based De-Scattering Imaging in Turbid Tissue-like Scattering Media 浊组织样散射介质中基于偏振的去散射成像

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-14 DOI: 10.3390/photonics10121374

Shirong Zhang, Jian Liang, Yanru Jiang, Liyong Ren

引用次数: 0

C- and L-Bands Wavelength-Tunable Mode-Locked Fiber Laser C 波段和 L 波段波长可调模式锁定光纤激光器

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-14 DOI: 10.3390/photonics10121379

Jiajing Lang, Cheng Chen, Pu Zhang, Mei Qi, Haowei Chen

引用次数: 0

Influence of the Spectral Composition of Illuminating Light Sources on Biometric and Phytochemical Characteristics of Ocimum basilicum L. 照明光源的光谱成分对欧芹生物计量学和植物化学特征的影响

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-13 DOI: 10.3390/photonics10121369

Mariya Degtereva, Yevgeniy Levin, Anastasia Gubina, Aleksandr E. Degterev, Ivan Lamkin, G. Konoplev, Sergey Tarasov, Andrei Whaley, A. Whaley, I. Suloev, A. Danilova, K. Gusev, D. Maimistov

{"title":"Influence of the Spectral Composition of Illuminating Light Sources on Biometric and Phytochemical Characteristics of Ocimum basilicum L.","authors":"Mariya Degtereva, Yevgeniy Levin, Anastasia Gubina, Aleksandr E. Degterev, Ivan Lamkin, G. Konoplev, Sergey Tarasov, Andrei Whaley, A. Whaley, I. Suloev, A. Danilova, K. Gusev, D. Maimistov","doi":"10.3390/photonics10121369","DOIUrl":"https://doi.org/10.3390/photonics10121369","url":null,"abstract":"Precise adaptation of the greenhouse lighting spectrum to basic photophysiological processes can effectively and directionally stimulate plant growth and development. The optimal spectrum depends on the plant species and the stage of development and could be assessed empirically. The aim of this study is to determine the LED illumination spectrum that provides a significant improvement in the growth rate and accumulation of biologically active compounds for basil plants (Ocimum basilicum L.) under hydroponic cultivation compared to more traditional lighting sources. The following light sources with various emission spectra were used: an LED lamp within a spectral range of 400–800 nm (B:G:R 15%:5%:80%); a high-pressure sodium lamp (HPS) (B:G:R 5%:45%:50%); a compact fluorescent lamp (B:G:R 20%:40%:40%); a grow LED strip (B:G:R 15%:40%:45%); a white LED lamp (B:G:R 30%:45%:25%); a customized LED lighting setup in color ratios 100%B, 75%B + 25%R, 50%B + 50%R, 25%B + 75%R, 100%R, and natural lighting. A photosynthetic photon flux density (PPFD) of 150 μmol∙m−2∙s−1 was provided with all the sources. It was demonstrated reliably that employing the LED strip as an illumination device gives a 112% increase in basil plant yield compared to the HPS; the transpiration coefficient for the LED strip is six times lower than for the HPS. The content of flavonoids in the basil aerial parts on the 30th, 50th, and 70th days of development is 3.2 times higher than for the HPS; the metabolite composition is also more uniform for LED strip lighting.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":"56 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138976493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Mode-Independent Optical Switch Based on Graphene-Polymer Hybrid Waveguides 基于石墨烯-聚合物混合波导的模式无关光开关

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-13 DOI: 10.3390/photonics10121372

Tianhang Lian, Yuhang Xie, Qidong Yu, Shijie Sun, Xiaoqiang Sun, Xi-bin Wang, Daming Zhang

{"title":"Mode-Independent Optical Switch Based on Graphene-Polymer Hybrid Waveguides","authors":"Tianhang Lian, Yuhang Xie, Qidong Yu, Shijie Sun, Xiaoqiang Sun, Xi-bin Wang, Daming Zhang","doi":"10.3390/photonics10121372","DOIUrl":"https://doi.org/10.3390/photonics10121372","url":null,"abstract":"Mode-division multiplexing (MDM) is a promising multiplexing technique to further improve the transmission capacity of optical communication and on-chip optical interconnection systems. Furthermore, the multimode optical switch is of great importance in the MDM system, since it makes the MDM system more flexible by directly switching multiple spatial signals simultaneously. In this paper, we proposed a mode-independent optical switch based on the graphene–polymer hybrid waveguide platform that could process the TE11, TE12, TE21 and TE22 modes in a few-mode waveguide. The presented switch is independent of the four guided modes, optimizing the buried position of graphene capacitors in the polymer waveguide to regulate the coplanar interaction between the graphene capacitors and spatial modes. The TE11, TE12, TE21 and TE22 modes can be regulated simultaneously by changing the chemical potential of graphene capacitors in a straight waveguide. Our presented switch can enable the independent management of the spatial modes to be more flexible and efficient and has wide application in the MDM transmission systems.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":"183 S477","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139006451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The Birefringence and Extinction Coefficient of Ferroelectric Liquid Crystals in the Terahertz Range 太赫兹范围内铁电液晶的双折射和消光系数

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-13 DOI: 10.3390/photonics10121368

Ying Ma, Yuhang Shan, Yongning Cheng, Ruisheng Yang, H. Kwok, Jianlin Zhao

引用次数: 0

Special Issue on Photonic State Tomography: Methods and Applications 光子态断层摄影特刊：方法与应用

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2023-12-13 DOI: 10.3390/photonics10121370

A. Czerwinski

引用次数: 0