We demonstrate 8 lane compact optical transceivers running at 50Gb/s using EMLs with PAM4 encoding. MEMS-alignment of lasers and a compact PLC with integrated vertical deflection mirrors enables simple low-cost assembly and high density.

Searches for supersymmetric particles produced in e + e (cid:0) collisions at centre-of-mass energies of 130 and 136 GeV have been performed in a data sample of 5.7 pb (cid:0) 1 collected in the autumn of 1995 by the ALEPH detector at LEP. No candidate events were found, allowing limits to be set on the masses and production cross-sections of scalar leptons, scalar tops, charginos and neutralinos. The domains previously excluded at LEP1 are substantially extended. For instance, masses of gaugino-like charginos smaller than 67.8 GeV/ c 2 are excluded at the 95% C.L. for scalar neutrino masses larger than 200 GeV/ c 2 . (Submitted Letters

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. LHCb Computing Technical Design Report R. Antunes Nobrega, A. Franca Barbosa, I. Bediaga, G. Cernicchiaro, E. Correa de Oliveira, J. Magnin, L. Manhaes de Andrade Filho, J. Marques de Miranda, H. Pessoa Lima Junior, A. Reis, et al.