1st Workshop on Specialty Optical Fibers and Their Applications最新文献_第2页

Six Degree Freedom Optical Fiber Accelerometer 六自由度光纤加速度计

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002519

R. M. Cazo, E. Ribeiro, Marcelo Buonocore Nunes, C. L. Barbosa, J. Ferreira, Tales de Barros Caldas, J. C. Santos, J. U. Arruda

{"title":"Six Degree Freedom Optical Fiber Accelerometer","authors":"R. M. Cazo, E. Ribeiro, Marcelo Buonocore Nunes, C. L. Barbosa, J. Ferreira, Tales de Barros Caldas, J. C. Santos, J. U. Arruda","doi":"10.1063/1.3002519","DOIUrl":"https://doi.org/10.1063/1.3002519","url":null,"abstract":"Linear accelerations measurements are needed in many applications, as industry, military, aircrafts, space navigation, robotics and others. Actually, the most usual solutions to measure linear accelerations are three piezoelectric sensors used in orthogonal mounting, or MEM’s sensors chips.\u0000 Angular accelerations also are interesting to control and stabilize structures, like satellites and servo motors. It is possible to measure angular accelerations in two ways: direct measurement (using special sensors), or indirect measurements (obtaining acceleration of the angular velocity information) [1].\u0000 This work intends to present the structural and optical requirements of a six degree freedom opto-mechanical accelerometer based on fiber Bragg grating (FBG). With this sensor, it will be possible the direct measurement of three axial accelerations, and of three angular accelerations, with unlimited rotation angle, using one single proof mass. The FBG’s are used as strain sensors and sustaining elements of the proof mass in the structure. Simulations have demonstrated that cross influences of 10 parts per million at worst case are possible. This kind of accelerometer may be used in navigation control, structural monitoring, satellite stabilization, guidance control and harsh environments, for example.\u0000 The project requirements include the wavelength of FBG’s, pre-strain and length of active segment of optical fibers, dimensions, material and structure of inertial proof mass and position of the fibers in the sustaining structure","PeriodicalId":301956,"journal":{"name":"1st Workshop on Specialty Optical Fibers and Their Applications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133081221","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: 3

Long Period Fiber Grating Fabricated by Defocused CO2 Laser for Refractive Index Sensing 离焦CO2激光器制备用于折射率传感的长周期光纤光栅

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002513

Minwei Yang, Dong-ning Wang, Yuhua Li

{"title":"Long Period Fiber Grating Fabricated by Defocused CO2 Laser for Refractive Index Sensing","authors":"Minwei Yang, Dong-ning Wang, Yuhua Li","doi":"10.1063/1.3002513","DOIUrl":"https://doi.org/10.1063/1.3002513","url":null,"abstract":"Long period fiber grating (LPFG) has many applications in optical fiber communications and optical fiber sensors. It can be fabricated by many methods. Recently, an edge written LPFG with large resonant peak loss and apparent asymmetric cladding mode coupling has been produced by focusing the high frequency CO2 laser pulses directly on the fiber cladding surface. Such a LPFG exhibits only a small area of refractive index change on the fiber cladding surface without any physical deformation. In this work, we developed a new LPFG fabrication method by use of defocused CO2 laser pulses, i.e. to move the laser beam focus slightly away from the fiber cladding surface. No apparent physical damage is observed after the LPFG fabrication. With the increase of the moving distance from the fiber cladding surface, the induced average refractive index change in the fiber cladding becomes smaller, which also leads to a decreased polarization dependent loss when compared with the LPFG made by the focused CO2 laser pulses. The LPFG developed in this work also shows a higher sensitivity of the resonant wavelength to the external refractive index around the fiber cladding than that made by use of focused CO2 laser pulses. It is expected that this new type of LPFGs have important applications in refractive index sensors.","PeriodicalId":301956,"journal":{"name":"1st Workshop on Specialty Optical Fibers and Their Applications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116739507","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

Design and Simulation for Ultra High Soliton Pulse Compression through Photonic Crystal Fiber 光子晶体光纤超高孤子脉冲压缩的设计与仿真

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002530

R. Raja, S. Sivabalan, K. Porsezian

引用次数: 1

Photonic Technologies Integrated into Optical Fibres 光子技术与光纤的集成

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002546

C. Martelli, J. Canning

引用次数: 0

Fabrication and Postprocessing of Ge-Doped Nanoweb Fibers 掺锗纳米网纤维的制备及后处理

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002541

S. Torres-Peiró, A. Díez, J. Cruz, M. Andrés

引用次数: 3

Spontaneous Raman Scattering in Optical Fiber: Experimental Measurement 光纤中的自发拉曼散射:实验测量

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002528

L. A. Ribeiro, S. F. Quirino, A. O. Toledo, C. L. Barbosa, O. Lisbôa, J. U. Arruda

{"title":"Spontaneous Raman Scattering in Optical Fiber: Experimental Measurement","authors":"L. A. Ribeiro, S. F. Quirino, A. O. Toledo, C. L. Barbosa, O. Lisbôa, J. U. Arruda","doi":"10.1063/1.3002528","DOIUrl":"https://doi.org/10.1063/1.3002528","url":null,"abstract":"Fiber sensors are the state of the art in distributed sensors. The basic effects for distributed sensors of temperature and strain are related with nonlinear optics. However, the development of this equipment require a well established knowledge about the characteristics effects involved and how they change the spectral distribution of the light: its intensity and frequency; in this way the work shows up spontaneous Raman measurement in optical fiber and discuss its mainly characteristics. The measurements were taken with a 1319 nm wavelength from a Nd-YAG CW laser coupled in a 2,7 km monomode optical fiber. Several spectrum were taken in the range of 20 mW till 100 mW, also the ratio power output/power input was observed in that range. The Raman shift measured in this experiment, about 12 THz, is in a good agreement with the literature. Raman peaks were observed only in the 20mW - 90mW range, it has been observed that the higher the power input, the lower is the spontaneous Raman peaks intensity, and at 100 mW it vanishes completely. The power ratio analyses shows the power transmission loss; it is discussed the pump depletion due to nonlinear backscattering and the Raman beam depletion for higher power input values are also discussed.","PeriodicalId":301956,"journal":{"name":"1st Workshop on Specialty Optical Fibers and Their Applications","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122290737","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: 2

Ultraflat Supercontinuum Spectrum Generated with Soft-Glass Photonic Crystal Fibers 软玻璃光子晶体光纤产生的超平坦超连续谱

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002553

J. Miret, P. Andrés, E. Silvestre

引用次数: 0

Recent Advances on Optical Sensing Using Photonic Crystal Fibers 光子晶体光纤光传感研究进展

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002537

M. Marques, F. Magalhães, J. P. Carvalho, O. Frazão, F. Araújo, J. Santos, L. Ferreira

引用次数: 3

Holey Fibers with a Limited Number of Air Hole Rings in the Cladding: Design, Fabrication and Application for Some Interferometric Sensing Devices 包层气孔环数量有限的多孔光纤:一些干涉传感器件的设计、制造和应用

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002554

V. Minkovich

{"title":"Holey Fibers with a Limited Number of Air Hole Rings in the Cladding: Design, Fabrication and Application for Some Interferometric Sensing Devices","authors":"V. Minkovich","doi":"10.1063/1.3002554","DOIUrl":"https://doi.org/10.1063/1.3002554","url":null,"abstract":"Large-mode-area all-silica holey fibers (HFs), which are specially designed with a limited number of air hole rings in cladding, are presented. Fibers with 2, 3, and 4 air hole rings were inspected, and the transmission losses and the demands for the single-mode waveguide operation in a series of the HF samples with different relative hole diameters d/Λ were analyzed. It has been found, in particular, that for the fibers there is an optimal ratio, d/ Λ =0.52±0.05, that provides a single-mode output for shorter HFs (a few meters long), and low transmission and bending losses for longer HFs (hundreds of meters long). The HFs developed were used for the fabrication of compact modal interferometers, which represent special tapers with gradually collapsed air holes in the taper waist. The gradual collapsing of the holes is achieved by tapering the fibers with a “slow-and-hof ’ method (nonadiabatic process). As a result, at the excitation of the fundamental mode in the HF core, it couples to two high-order modes of the solid taper waist. Due to the beating between the modes, the transmission spectra of the taper exhibit several interference peaks that are shifted to a shorter or longer wavelength under the influence of various external parameters. The use of the HF tapers in different sensing devices for the measuring of refractive indexes of liquids, high temperature, strain, and hydrogen sensing is demonstrated.","PeriodicalId":301956,"journal":{"name":"1st Workshop on Specialty Optical Fibers and Their Applications","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116319773","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

Opto-Mechanical Response of a Suspended-Slab-Core Optical Fiber 悬置板芯光纤的光力学响应

1st Workshop on Specialty Optical Fibers and Their Applications Pub Date : 2008-10-01 DOI: 10.1063/1.3002523

V. A. Serrão, F. Sircilli, Marcos A. R. Franco, C. Cordeiro

引用次数: 0