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Applications of Photonic Technology最新文献

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Experimental characterization of short laser pulses with RMS duration and pulse quality factor 激光短脉冲的RMS持续时间和脉冲质量因子的实验表征
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473836
G. Rousseau, N. Mccarthy, M. Piché
{"title":"Experimental characterization of short laser pulses with RMS duration and pulse quality factor","authors":"G. Rousseau, N. Mccarthy, M. Piché","doi":"10.1117/12.473836","DOIUrl":"https://doi.org/10.1117/12.473836","url":null,"abstract":"We have measured the evolution of the root-mean-square (rms) duration of femtosecond pulses propagating in a dispersive medium (fused silica). Measured rms durations were compared to a theoretical propagation law based on a Pulse Quality Factor. Excellent agreement is found between theory and experiment when rms durations are evaluated with the help of the concept of fractional power.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134319983","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
Surface electromagnetic waves on dielectrics with conducting interfaces 具有导电界面的电介质上的表面电磁波
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474842
K. Mehrany, S. Khorasani, B. Rashidian
{"title":"Surface electromagnetic waves on dielectrics with conducting interfaces","authors":"K. Mehrany, S. Khorasani, B. Rashidian","doi":"10.1117/12.474842","DOIUrl":"https://doi.org/10.1117/12.474842","url":null,"abstract":"In several recent papers, layered waveguide structures with conductive interfaces have been discussed, whose propagation properties are controlled by a transverse voltage. These structures can be used as a dynamic optical read/write memory cell, and programmable optical diffractive element. In this paper, the excitation of surface waves with the presence of interface charges is discussed. Interface charges affect the dispersion of surface waves, and therefore they can be used in various applications such as optical modulators, switches, sensors and filters. These waves can be superior to surface plasmon waves since they are not lossy. The lossless property is satisfied in limited range: millimeter waves to far infrared.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129407980","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: 6
Automated measurements of PDL and PMD over fiber Bragg gratings reflection wavelength 光纤Bragg光栅反射波长上PDL和PMD的自动测量
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473976
Ou Chen, P. Lu, Liang Chen, X. Bao
{"title":"Automated measurements of PDL and PMD over fiber Bragg gratings reflection wavelength","authors":"Ou Chen, P. Lu, Liang Chen, X. Bao","doi":"10.1117/12.473976","DOIUrl":"https://doi.org/10.1117/12.473976","url":null,"abstract":"A novel method of measuring the polarization dependent loss (PDL) and the polarization mode dispersion (PMD) of fiber Bragg gratings (FBGs) is proposed and demonstrated experimentally. This method eliminates the influence of components (e.g. circulator) on the PDL and PMD characterization of FBGs. The experimental results are compared with those measured using other methods.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"4833 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131311947","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
Effects of halogen doping on structure of silica glass as a photonic material 卤素掺杂对光子材料硅玻璃结构的影响
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474295
H. Kakiuchida, Kazuya Saito, N. Hiramitsu, A. Ikushima
{"title":"Effects of halogen doping on structure of silica glass as a photonic material","authors":"H. Kakiuchida, Kazuya Saito, N. Hiramitsu, A. Ikushima","doi":"10.1117/12.474295","DOIUrl":"https://doi.org/10.1117/12.474295","url":null,"abstract":"In silica glass frozen-in temperature of glass structure, so-called the fictive temperature, is strongly related to optical properties such as the Rayleigh scattering intensity and location of ultraviolet absorption edge. We investigated these optical properties with respect to the fictive temperature of samples with various fluorine concentrations. Furthermore, the structural relaxation during glass forming process was systematically examined. We have found that doping of fluorine strongly encourages the structural relaxation and lowers the fictive temperature. We have also found that relations between the fictive temperature and the optical properties vary sensitively to fluorine concentration.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133758672","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
Fabrication of a three-dimensional photonic band-gap crystal of air-spheres in a titania matrix 二氧化钛基体中三维空气球光子带隙晶体的制备
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474310
M. Diop, G. Maurin, A. Tork, R. Lessard
{"title":"Fabrication of a three-dimensional photonic band-gap crystal of air-spheres in a titania matrix","authors":"M. Diop, G. Maurin, A. Tork, R. Lessard","doi":"10.1117/12.474310","DOIUrl":"https://doi.org/10.1117/12.474310","url":null,"abstract":"A three-dimensional (3D) colloidal crystal have been grown from an aqueous colloidal solution of highly monodisperse submicrometer-sized polystyrene spheres using a self-assembly processing technique. The electromagnetic waves diffracted by this crystal can interfere and give rise to a photonic band-gap. However, due to the low refractive index contrast within this material the band-gap is incomplete. By filling the voids between the spheres of the colloidal crystal with titania and removing the polystyrene beads by sublimation, we obtained an inverse-opal structure with an increased refractive index contrast showing strong opalescence.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115423232","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
Photochemical process in dichromated photosensitive material: dichromated (polyvinyl alcohol-polyacrylic acid)-- a model for dichromated gelatin? 重铬化光敏材料的光化学过程:重铬化(聚乙烯醇-聚丙烯酸)——重铬化明胶的模型?
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474364
M. Bolte, R. Lessard, C. Pizzocaro
{"title":"Photochemical process in dichromated photosensitive material: dichromated (polyvinyl alcohol-polyacrylic acid)-- a model for dichromated gelatin?","authors":"M. Bolte, R. Lessard, C. Pizzocaro","doi":"10.1117/12.474364","DOIUrl":"https://doi.org/10.1117/12.474364","url":null,"abstract":"Gelatin (G) can be described as a peptidic chain with different pendent groups among which, hydroxy groups-OH, carboxylic groups-COOH and amino groups -NH2. Works performed on polyacrylic acid (PAA), a poymeric chain with only pendent-COOH group and on polyvinyl alcohol (PVA) with only -OH group revelaed the strong influence of the nature of the chemical structure on the photochemical behavior of dichromated photopolymers, DCG, DCPAA and DCPVA. Actually, the stability and the state of complexation of the different chromium species was completely opposite in the two matrices: the stabilization of chromium (V) resulting from the photochemical charge transfer in DCPVA, by complexation with PVA is in contrast to what was observed in DCPAA where chromium (V) was highly instable. Regarding chromium (III), the final reduction chromium species, it is complexed in PAA and not in PVA. The primary proces is identical in DCG and in DCPVA, so PVA appears as a good model of the first step of gelatin behavior. But the material obtained after irradiation and treatment of DCG only contains chromium strongly complexed by gelatin. The experiments performed on films of DC with only a few percents of PAA gave evidence for the strong influence of the presence of the carboxylic groups on the photochemical behavior: the rate of the formation and the stability of chromium species, mainly chromium (V), involved in the process. Chromium (V) appears to play a key role in the photosensitive properties of dichromated materials. The diffraction efficiencies of holograms recorded in DCPAA or DCPVA resemble the profiles of chromium (V) evolution.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124375618","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
Study of the Intensity Ratio from the Characteristics of Autofluorescence Spectra of the Human Colorectal Tissue 从人结直肠组织自身荧光光谱特征研究其强度比
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474747
Tianyun Zhao, T. Chia, C. Diong
{"title":"Study of the Intensity Ratio from the Characteristics of Autofluorescence Spectra of the Human Colorectal Tissue","authors":"Tianyun Zhao, T. Chia, C. Diong","doi":"10.1117/12.474747","DOIUrl":"https://doi.org/10.1117/12.474747","url":null,"abstract":"Autofluorescence is widely investigated as a sensitive method in early diagnosis of diseased tissue, but most measurements of tissue autofluorescence were performed with only a single excitation wavelength. This work is aim to optimize the excitation wavelength or emission wavelength bands for fluorescence spectroscopy for better clinical diagnostic accuracy. The autofluorescence spectra of colorectal tissue were studied over a wide excitation range (350-600 nm). The excitation 350 nm and 470 nm were identified as effective excitation wavelength for inducing tissue autofluorescence. The ratio of emission peak intensity at 470 nm versus 610 nm excited by 350 nm and the ratio of emission peak intensity at 510 nm versus 610 nm excited by 470 nm were found as good indications to distinguish normal and diseased tissue. The observed peaks of the fluorescence spectra were also compared with some well known tissue fluorophores.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117280496","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
Identification of thin metal film on surface plasma resonance probe by using heterodyne interferometry 用外差干涉法鉴别表面等离子体共振探头上的金属薄膜
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.478234
Cheng-Chih Hsu, Kun-Huang Chen, D. Su
{"title":"Identification of thin metal film on surface plasma resonance probe by using heterodyne interferometry","authors":"Cheng-Chih Hsu, Kun-Huang Chen, D. Su","doi":"10.1117/12.478234","DOIUrl":"https://doi.org/10.1117/12.478234","url":null,"abstract":"A light beam coming from a heterodyne light source and is divided into three parts by two beam-splitters. Two parts are guided to be incident on the thin metal film on a surface plasma resonance (SPR) probe from two other sides. Two groups of multiple reflected beams occur in the thin metal film, they pass through their corresponding analyzer and lens, and are detected by the associated photodetectors. So we have two test signals. On the other hand, the other part passes through an analyzer and enters a photodetector. The intensity measured by the photodetector is the reference signal. These two test signals and the reference signal are send to a phse meter, the phase differences between the test signals and the reference signal can be obtained. Substituting these data into the special equations derived from Fresnel's equations and the principle of multiple beam interference, the complex refractive index and the thickness of the thin metal film of the probe can be estimated. Because of its common path optical configuration and its heterodyne interferometric phase measurement, this method has many merits, such as, high stable against the surrounding vibration, high resolution, real time operation. In addition, four samples are tested to show the validity of this method.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115999023","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
Comb filter based on an all polarization maintaining fiber loop and its applications 全保偏光纤环路梳状滤波器及其应用
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474048
Kejiang Zhou, Wei Ye, Jiangliang Yang, N. Ngo, J. Yao
{"title":"Comb filter based on an all polarization maintaining fiber loop and its applications","authors":"Kejiang Zhou, Wei Ye, Jiangliang Yang, N. Ngo, J. Yao","doi":"10.1117/12.474048","DOIUrl":"https://doi.org/10.1117/12.474048","url":null,"abstract":"All polarization maintaining fiber Sagnac interferometers with linearly birefringence are proposed for the construction of stable comb filters. The transfer functions of the filters can be determined if stress-induced birefringence fiber is used because its birefringence is more or less independent of wavelength. The transfer function of the simplest filter, which acts as a comb filter, with only one polarization mode-coupling point is obtained. Several filters have been realized; they exhibit channel isolation of about 22 dB and can be used as frequency selectors in multi-wavelength fiber lasers. We also discuss the potential applications of the proposed filter that include add-drop multiplexers in wavelength division multiplexing (WDM) systems, gain flattening in fiber amplifiers, and switches/modulators.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116808850","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: 8
Distributed fiber optic system for oil pipeline leakage detection 输油管道泄漏检测分布式光纤系统
Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474336
R. Paranjape, N. Liu, C. Rumple, E. Hara
{"title":"Distributed fiber optic system for oil pipeline leakage detection","authors":"R. Paranjape, N. Liu, C. Rumple, E. Hara","doi":"10.1117/12.474336","DOIUrl":"https://doi.org/10.1117/12.474336","url":null,"abstract":"We present a novel approach for the detection of leakage in oil pipelines using methods of fiber optic distributed sensors, a presence-of-oil based actuator, and Optical Time Domain Reflectometry (OTDR). While the basic concepts of our approach are well understood, the integration of the components into a complete system is a real world engineering design problem. Our focus has been on the development of the actuator design and testing using installed dark fiber. Initial results are promising, however environmental studies into the long term effects of exposure to the environment are still pending.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130737089","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
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