K. Gallo, C. Codemard, C. Gawith, P. Smith, J. Nilsson, N. Broderick, D. Richardson
{"title":"Buried slab waveguides in LiNbO/sub 3/ nonlinear photonic crystals","authors":"K. Gallo, C. Codemard, C. Gawith, P. Smith, J. Nilsson, N. Broderick, D. Richardson","doi":"10.1109/WFOPC.2005.1462097","DOIUrl":"https://doi.org/10.1109/WFOPC.2005.1462097","url":null,"abstract":"We present an efficient integrated device for SHG at telecom wavelengths in hexagonally poled LiNbO/sub 3/, based on the reverse proton exchange waveguide technology. We discuss its nonlinear response in terms of power, wavelength and angle tunability and use the experimental SHG data to infer also information on the linear properties of the waveguide.","PeriodicalId":445290,"journal":{"name":"Proceedings of 2005 IEEE/LEOS Workshop on Fibres and Optical Passive Components, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126734382","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}
{"title":"Ab-initio simulations of backward second harmonic generation in periodic poled lithium niobate","authors":"A. Di Falco, C. Conti, G. Assanto","doi":"10.1109/WFOPC.2005.1462150","DOIUrl":"https://doi.org/10.1109/WFOPC.2005.1462150","url":null,"abstract":"We report on ab-initio simulations of second harmonic generation in periodically poled lithium niobate. The model used takes in account the whole dispersion and anisotropy of the material as well as its second order susceptibility tensor.","PeriodicalId":445290,"journal":{"name":"Proceedings of 2005 IEEE/LEOS Workshop on Fibres and Optical Passive Components, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126825888","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}
{"title":"Absorption edge in silica glass","authors":"R. Boscaino, E. Vella, G. Navarra","doi":"10.1109/WFOPC.2005.1462147","DOIUrl":"https://doi.org/10.1109/WFOPC.2005.1462147","url":null,"abstract":"Measurements of optical absorption in the v-UV range in a variety of silica glass are used to determine the width of the absorption edge (Urbach energy). Measured values range from 60 meV up to 180 meV. So high a variability over silica types is tentatively ascribed to the different disorder degree, which characterizes different materials.","PeriodicalId":445290,"journal":{"name":"Proceedings of 2005 IEEE/LEOS Workshop on Fibres and Optical Passive Components, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122203776","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}
A. Povolotskiy, A. Shimko, A. Manshina, S. Bivona, G. Ferrante
{"title":"2D and 3D laser writing for integrated optical elements creation","authors":"A. Povolotskiy, A. Shimko, A. Manshina, S. Bivona, G. Ferrante","doi":"10.1109/WFOPC.2005.1462107","DOIUrl":"https://doi.org/10.1109/WFOPC.2005.1462107","url":null,"abstract":"We report on laser writing of 2D and 3D structures based on laser induced structural modifications. In our experiment, bulk glasses of chalcogenide systems Ga-Ge-S, As/sub 2/S/sub 3/ and Ga-Ge-S thin films have been used. Photo-structuring of the bulk glasses has been obtained by using low energy (< 2.5 nj) fs laser pulses with wavelength of 815 nm, while the films have been photo-structured by using both fs and nitrogen lasers. Spherical structures in the bulk glasses have been found whose geometrical form and size depend on both the sample translation velocity and the laser pulse energy. With increasing the sample translation velocity up to 3 cm/s, and for values of the average laser power of 150 mW, the spherical structures disappear and flat waveguides are created. The manufacturing laser threshold for bulk chalcogenide glasses was found to be about 2 /spl middot/ 10/sup 10/ W/cm/sup 2/. For the case of films irradiated by the nitrogen laser a blue shift of the optical absorption edge and a decrease of the refractive index were measured. The considerable and controllable change of the optical parameters allowed us to create waveguides showing the possibility of realizing integrated optical circuits with high density of elements.","PeriodicalId":445290,"journal":{"name":"Proceedings of 2005 IEEE/LEOS Workshop on Fibres and Optical Passive Components, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129510209","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}
{"title":"Evaluation of solarization resistant optical fibers under gamma-ray irradiation and temperature stress","authors":"D. Sporea, A. Sporea","doi":"10.1109/WFOPC.2005.1462164","DOIUrl":"https://doi.org/10.1109/WFOPC.2005.1462164","url":null,"abstract":"Five types of large diameter optical fibers (600 /spl mu/m and 1000 /spl mu/m core diameter) having either an enhanced UV transmission or being solarization resistant were subjected to gamma-ray irradiation, at a dose rate of 0.3 kGy/h /spl plusmn/ 5%, up to a total irradiation dose of 113 kGy, at room temperature. The radiation induced optical absorption in the UV-visible spectral range (200 nm - 450 nm) was monitored, off-line, for each irradiation steps. For some samples, after each irradiation a temperature stress was applied to investigate the thermal annealing of the optical absorption. The dynamics of the irradiation induced color centers was evaluated using a Gaussian deconvolution of the absorption spectra, in the UV spectral range. One of the solarization resistant optical fiber has a very good radiation resistance. This optical fiber loses its quality if it is heated prior to the irradiation. The amplitude and the location of the radiation induced optical attenuation peaks depend on the optical fiber type and the dimension of its core.","PeriodicalId":445290,"journal":{"name":"Proceedings of 2005 IEEE/LEOS Workshop on Fibres and Optical Passive Components, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133727466","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}
V. Italia, M. Pisco, S. Campopiano, A. Cusano, A. Cutolo
{"title":"Tunable optical true time delay line based on chirped fiber Bragg grating","authors":"V. Italia, M. Pisco, S. Campopiano, A. Cusano, A. Cutolo","doi":"10.1109/WFOPC.2005.1462152","DOIUrl":"https://doi.org/10.1109/WFOPC.2005.1462152","url":null,"abstract":"In this paper a continuously variable delay line for phased array antennas is presented. The proposed delay line operates at a single optical wavelength and it's based on a linearly chirped fiber Bragg gratings (LCFBG). Continuous true time delay can be achieved by changing the temperature along the grating region. Experimental setup uses a metallic support on which the grating is bonded. This allows to increase the temperature sensitivity of LCFBG, assuring the temperature uniformity too. Such delay line offers many advantage for beamforming application in phased array antennas where is required to simplify the architecture of these system.","PeriodicalId":445290,"journal":{"name":"Proceedings of 2005 IEEE/LEOS Workshop on Fibres and Optical Passive Components, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132909660","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}