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Relief gratings on Er/Yb-doped borosilicate glasses and waveguides by excimer laser ablation

Autor: Laurence Reekie, James S. Wilkinson, Stavros Pissadakis, M. Hempstead, Michael Zervas

Publikováno v: Applied Surface Science. 153:200-210

Relief gratings have been fabricated on Er/Yb-doped borosilicate glass substrates by laser ablation using a 193 nm excimer laser and a modified Mach-Zehnder interferometer. The grating fabrication process was quantified using diffraction efficiency m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66c5fbe9e2099645e21925864310c873
https://doi.org/10.1016/s0169-4332(99)00365-7

Waveguide lasers operating at 1084 nm in neodymium-diffused lithium niobate

Autor: M. Hempstead, James S. Wilkinson, Laurence Reekie

Publikováno v: IEEE Photonics Technology Letters. 4:852-855

The authors report the demonstration of waveguide lasers in lithium niobate into which the active element neodymium has been introduced by thermal diffusion. The waveguides were fabricated using conventional Ti indiffusion and optical feedback was pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::213220c1f52c0a1acfa0c0a633df1d76
https://doi.org/10.1109/68.149885

Channel waveguide laser at 1 microm in Yb-indiffused LiNbO(3)

Autor: J.K. Jones, Anne C. Tropper, M. Hempstead, David Shepherd, James S. Wilkinson, A.C. Large, J.P. de Sandro

Publikováno v: Optics letters. 20(13)

We report laser action in a Ti-diffused LiNbO(3) waveguide doped with trivalent Yb ions by thermal indiffusion. Lasing was observed at 1008, 1030, and 1060 nm with thresholds as low as 15-mW launched pump power. We reduced photorefractivity, which in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78466d0a1c786460f3af8034d63b3097
https://pubmed.ncbi.nlm.nih.gov/19862054

Measurement of γγ widths of charmonium states

Autor: N. Katayama, P. Wilson, D. L. Hartill, R. Poling, R. Fulton, B. Gittlman, A. Silverman, W. M. Yao, D. L. Kreinick, E. Nordberg, C. O'Grady, H. Kagan, G. C. Moneti, M. S. Alam, Tomasz Skwarnicki, F. Morrow, E. I. Shibata, A. J. Sadoff, K. Sparks, Themistocles Bowcock, V. Jain, C. R. Ng, M. Procario, W. C. Li, M. Thulasidas, C. H. Park, John Yelton, Daniela Bortoletto, Marina Artuso, T. Jensen, R. L. McIlwain, D. M. Coffman, H. Worden, N. B. Mistry, L. Garren, B. K. Heltsley, S. W. Gray, J. W. Dewire, M. Pisharody, Karl Berkelman, Elliott Cheu, Glen D. Crawford, V. Sharma, R. Ehrlich, M. Sapper, J. Whitmore, N. Horwitz, Chunjie Wang, J. Kandaswamy, R. Ammar, D. Perticone, P. N. Wang, P. Haas, James Mueller, D. Peterson, Philip Baringer, D. R. Johnson, A. Jawahery, D. Xiao, D. Besson, E. H. Thorndike, F. M. Pipkin, D. Coppage, P.S. Dell, S. E. Csorna, M. I. Zoeller, K. Kinoshita, R. Namjoshi, T. Letson, D. H. Miller, Ha Lam, J. D. Lewis, C. Bebek, W. Y. Chen, C. R. Sun, R. D. Kass, M. Goldberg, A. M. Halling, M. Worris, J. Wolinski, D. Riley, Sheldon Stone, Xinchou Lou, S. F. Schaffner, Paul Avery, M. Hempstead, Yuichi Kubota, Richard Wilson, D. G. Cassel, James Alexander, S. Nandi, J. K. Nelson, M. D. Mestayer, I. J. Kim, R. S. Galik, Ian Shipsey

Publikováno v: Chen, WY; McIlwain, RL; Miller, DH; Ng, CR; Schaffner, SF; Shibata, EI; et al.(1990). Measurement of γγ widths of charmonium states. Physics Letters B, 243(1-2), 169-174. doi: 10.1016/0370-2693(90)90975-C. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/99h6f86r
Physics Letters B, vol 243, iss 1-2

Using the CLEO detector at the Cornell Electron Storage Ring, we have searched for two-photon production of charmonium in four-track final states. We have measured Γ γγ ( η c )=5.9 +2.1 −1.8 ±1.9 keV, and we have obtained 95% CL upper limits o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc5c3088842cfe79b9e4acbc835b3640
https://doi.org/10.1016/0370-2693(90)90975-c