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Applications of Optics and Photonics最新文献

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Wavelength tuning of polymer optical fibre Bragg grating at longer wavelengths permanently 聚合物光纤布拉格光栅在更长波长的波长永久调谐
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2276375
G. Sagias, A. Pospori, D. Gallego, D. Webb, Horacio Lamela Rivera
{"title":"Wavelength tuning of polymer optical fibre Bragg grating at longer wavelengths permanently","authors":"G. Sagias, A. Pospori, D. Gallego, D. Webb, Horacio Lamela Rivera","doi":"10.1117/12.2276375","DOIUrl":"https://doi.org/10.1117/12.2276375","url":null,"abstract":"Permanent Bragg wavelength tuning of polymer optical fibre Bragg grating (POFBG) at longer wavelengths has been demonstrated for the first time utilising the thermal annealing process. In general, exposing the polymer material above its β-transition temperature, the fibre shrinks in length, the Bragg grating period becomes shorter and the Bragg wavelength shifts permanently to shorter wavelengths. In this work, a positive tuning of Bragg wavelength has been shown to be feasible when the polymer fibre is stretched during its thermal exposure. The results show that the degree of Bragg wavelength tuning strongly depends on the applying fibre strain or equivalently stress. The work presented in this paper can be used to multiplex POFBGs at any desirable wavelength.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123531466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Researching in biomaterials optics 生物材料光学研究
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2276308
M. M. Pérez, A. Ionescu, A. Yebra, J. C. Cardona, L. J. Herrera, M. J. Rivas, O. Pecho, R. Ghinea
{"title":"Researching in biomaterials optics","authors":"M. M. Pérez, A. Ionescu, A. Yebra, J. C. Cardona, L. J. Herrera, M. J. Rivas, O. Pecho, R. Ghinea","doi":"10.1117/12.2276308","DOIUrl":"https://doi.org/10.1117/12.2276308","url":null,"abstract":"The optical properties of a tissue or a biomaterial can be described in terms of the absorption coefficient (μa), the scattering coefficient (μs), the scattering function p(θ,ψ) and the real refractive index of the biomaterial. The Inverse Adding-Doubling, IAD, Method and relationship between the Kubelka- Munk parameters and the transport coefficients are used to describe optical properties at different wavelengths for a large variety of tissues and tissue like biomaterials, such as native cornea, tissue engineered cornea, tissue engineered oral mucosa, natural dentin and dental resin nanocomposites, among others","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133463265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Pinching optical potentials for spatial nonlinearity management in Bose-Einstein condensates 玻色-爱因斯坦凝聚体空间非线性管理的缩紧光势
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2272062
N. Silva, J. C. Costa, M. Gomes, R. Alves, A. Guerreiro
{"title":"Pinching optical potentials for spatial nonlinearity management in Bose-Einstein condensates","authors":"N. Silva, J. C. Costa, M. Gomes, R. Alves, A. Guerreiro","doi":"10.1117/12.2272062","DOIUrl":"https://doi.org/10.1117/12.2272062","url":null,"abstract":"Here we explore the possibility of controlling the inhomogeneities in quasi-1D Bose-Einstein condensates using a spatial variation of the transverse confinement potential and explore different optical strategies to realize these pinched traps. Furthermore, we also present some early stage results on the dynamics of matter-wave solitons in such systems using computational simulations of the full 3D Gross-Pitaevskii equation.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"7 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125656435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling multicore integrated waveguides in highly doped glass 高掺杂玻璃中多核集成波导的建模
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2271843
D. Benedicto, J. Vallés
{"title":"Modeling multicore integrated waveguides in highly doped glass","authors":"D. Benedicto, J. Vallés","doi":"10.1117/12.2271843","DOIUrl":"https://doi.org/10.1117/12.2271843","url":null,"abstract":"Active integrated multicore waveguide structures (AIMWS) with high refractive index contrast values and controlled local composition can be fabricated inside a bulk doped glass as a result of recent developments in high repetition femtosecond laser writing. The modeling of these structures presents some distinct characteristics when compared to that of corresponding multicore fiber structures. In this paper we present a study of the influence of two of these features in the signal amplification: the glass homogeneous doping and the existence of a zone of depressed refractive index. In order to do that, we use a home-made computer code that solves the optical power propagation equations of the structure supermodes coupled to the rate equations of the active ions.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123855452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
White light spectral interferometer for measuring dispersion in the visible-near infrared 用于测量可见-近红外色散的白光光谱干涉仪
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2276329
Y. Arosa, Carlos Damián Rodríguez Fernández, B. Algnamat, E. López-Lago, R. de la Fuente
{"title":"White light spectral interferometer for measuring dispersion in the visible-near infrared","authors":"Y. Arosa, Carlos Damián Rodríguez Fernández, B. Algnamat, E. López-Lago, R. de la Fuente","doi":"10.1117/12.2276329","DOIUrl":"https://doi.org/10.1117/12.2276329","url":null,"abstract":"We have designed a spectrally resolved interferometer to measure the refractive index of transparent samples over a wide spectral band from 400 to 1550 nm. The measuring device consists of a Michelson interferometer whose output is analyzed by means of three fiber spectrometers. The first one is a homemade prism spectrometer, which obtains the interferogram produced by the sample over 400 to 1050 nm; the second one is a homemade transmission grating spectrometer thought to measure the interferogram in the near infrared spectral band from 950 to 1550 nm; the last one is a commercial Czerny-Turner spectrometer used to make high precision measurements of the displacement between the Michelson mirrors also using white light interferometry. The whole system is illuminated by a white light source with an emission spectrum similar to black body. We have tested the instrument with solid and liquids samples achieving accuracy to the fourth decimal on the refractive index after fitting it to a Cauchy formula","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124909207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novel multiband polarization beam splitter based on a dual-core transversally chirped microstructured optical fiber 基于双核横向啁啾微结构光纤的新型多波段偏振分束器
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2276381
E. Reyes-Vera, J. Úsuga-Restrepo, F. Gomez, N. Gómez-Cardona
{"title":"Novel multiband polarization beam splitter based on a dual-core transversally chirped microstructured optical fiber","authors":"E. Reyes-Vera, J. Úsuga-Restrepo, F. Gomez, N. Gómez-Cardona","doi":"10.1117/12.2276381","DOIUrl":"https://doi.org/10.1117/12.2276381","url":null,"abstract":"A novel compact and multiband polarization beam splitter based on a dual-core transversally chirped microstructured optical fiber is proposed and analyzed, using finite element method. The results show that the ≈2.9 mm-long polarization splitter can reach an extinction ratio lower than -20 dB in two bands at 1140 nm and 1556 nm. The bandwidths of both bands are 11.7 nm and 47.2 nm respectively. This work analyzes the operation of the device when it is subjected to curvature, finding that it is possible to tune the operating bands. Numerical calculation indicates that this novel structure may find application in telecommunications, because it is capable of working at different wavelength ranges.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123760789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Photonic integrated circuits for NG-EPON NG-EPON的光子集成电路
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2271837
Carla Rodrigues, Francisco Rodrigues, M. Lima, A. Teixeira
{"title":"Photonic integrated circuits for NG-EPON","authors":"Carla Rodrigues, Francisco Rodrigues, M. Lima, A. Teixeira","doi":"10.1117/12.2271837","DOIUrl":"https://doi.org/10.1117/12.2271837","url":null,"abstract":"This paper intends to propose a monolithic photonic integrated InP transceiver for Next Generation of Ethernet Passive Optical Network (NG-EPON). The presented architecture was designed as an Optical Network Unit (ONU). The concept behind the suggested transceiver architecture is here presented together with the steps necessary to deploy the proposed solution.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116551866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Scattering, absorption and transmittance of experimental graphene dental nanocomposites 实验石墨烯牙科纳米复合材料的散射、吸收和透射率
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2272028
M. M. Pérez, M. Salas, M. Moldovan, D. Dudea, A. Yebra, R. Ghinea
{"title":"Scattering, absorption and transmittance of experimental graphene dental nanocomposites","authors":"M. M. Pérez, M. Salas, M. Moldovan, D. Dudea, A. Yebra, R. Ghinea","doi":"10.1117/12.2272028","DOIUrl":"https://doi.org/10.1117/12.2272028","url":null,"abstract":"Optical properties of experimental graphene dental nanocomposites were studied. Spectral reflectance was measured and S and K coefficients as well as transmittance of samples were calculated using Kubelka-Munk’s equations. The spectral behavior of S, K and T experimental graphene exhibited different trends compared with the commercial nanocomposites and they were statistically different. Experimental nanocomposites show higher scattering and lower transmittance when compared with commercial nanocomposite, probably, due to the shape, type and size of the filler. K for short wavelength of the pre-polymerized experimental nancomposites was very low. According to our results, hidroxypatite with graphene oxide used in dental nanocomposites needs to be improved to reproduce esthetic properties of natural dental tissues and to have potentially clinical applications.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122519437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal sensitivity increase of RFBG in the visible range RFBG在可见光范围内的热敏度增加
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2275844
Patrícia Loren Inácio, C. C. de Moura, I. Chiamenti, V. de Oliveira, H. Kalinowski
{"title":"Thermal sensitivity increase of RFBG in the visible range","authors":"Patrícia Loren Inácio, C. C. de Moura, I. Chiamenti, V. de Oliveira, H. Kalinowski","doi":"10.1117/12.2275844","DOIUrl":"https://doi.org/10.1117/12.2275844","url":null,"abstract":"Thermal sensitivity increase of regenerated fiber Bragg gratings (RFBG) in the visible range is reported. The FBGs are produced by direct illumination under the phase mask using UV light from two different laser sources at 248 nm. After regeneration the thermal sensitivity is obtained at 500°C to avoid spectra vanishing for temperatures near that of regeneration. At 500°C, the determined thermal sensitivities are 5.74pmK-1 before and 7.65pmK-1 after regeneration (single mode fiber in the visible, femtosecond laser), and a similar pattern is presented for all regenerated FBGs.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123542565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optical quasi-distributed simultaneous vibration and temperature sensing in stator bars of a 370-MVA electric generator 370-MVA发电机定子棒的光学准分布同步振动和温度传感
Applications of Optics and Photonics Pub Date : 2017-08-22 DOI: 10.1117/12.2272189
U. Dreyer, Erlon Vagner da Silva, C. Martelli, J. C. Cardozo da Silva
{"title":"Optical quasi-distributed simultaneous vibration and temperature sensing in stator bars of a 370-MVA electric generator","authors":"U. Dreyer, Erlon Vagner da Silva, C. Martelli, J. C. Cardozo da Silva","doi":"10.1117/12.2272189","DOIUrl":"https://doi.org/10.1117/12.2272189","url":null,"abstract":"In this paper, we propose a new multiparametric optical fiber transducer applied to an electric generator of 370 MVA. The optical transducer has three multiplexed FBGs in the same optical fiber as the sensing element. The FBG sensors can simultaneously measure both the temperature and vibration independently of the other multiplexed FBGs. The installation in the power plant was performed using six transducers and it was obtained 23 hours of simultaneous vibration and temperature measurement. All the FBGs used to monitor generator vibration were able to monitor the frequency of mechanical and electromagnetic vibrations, which were measured at 2 Hz and 120 Hz, respectively. During the measurement, the machine was turned off due to a failure and all the FBGs sensed temperature changes, as well as frequency vibration changes. The largest temperature difference measured between the FBGs during the test is approximately 2°C.","PeriodicalId":150522,"journal":{"name":"Applications of Optics and Photonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126299665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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