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310 results on '"Lach, E."'

1. Wavelength Conversion Technology

Author

Stubkjaer, K. E., Mikkelsen, B., Joergensen, C., Danielsen, S. L., Vaa, M., Pedersen, R. J., Povlsen, H., Hansen, P. B., Schilling, M., Daub, K., Dütting, K., Idler, W., Klenk, M., Lach, E., Laube, G., Wünstel, K., Doussiere, P., Jourdan, A., Pommerau, F., Soulange, G., Goldstein, L., Emery, J. Y., Vodjdani, N., Ratovelomanana, F., Enard, A., Glastre, G., Rondi, D., Blondeau, R., and Prati, Giancarlo, editor

Published
1997
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9. Theoretical analysis of timing jitter in monolithic multisection mode-locked DBR laser diodes

Author

Zhu, B., White, I.H., Penty, R.V., Wonfor, A., Lach, E., and Summers, H.D.

Subjects
Diodes, Laser -- Research, Semiconductor lasers -- Research, Business, Computers, Electronics, Electronics and electrical industries
Abstract

A theoretical analysis was conducted on monolithic multisection mode-locked distributed Bragg lasers' timing jitter. A traveling-wave equation model with Langevin spontaneous emission noise was used. The model also considered the physical effects of self-phase modulation and gain nonlinearities. Results, which were compatible with experimental measurements, indicate that low-jitter operation is limited by spontaneous noise.

Published
1997

11. Contributors to Volume 13

Author

Ammar, Abderrahim, primary, Anton, Peter A., additional, Audigier, Sylvie, additional, Balestre, Marie-Noelle, additional, Barberis, Claude, additional, Battey, James, additional, Bianchi, Bruce R., additional, Butlen, Daniel, additional, Carini, David J., additional, Caulfield, Michael P., additional, Chiu, Andrew T., additional, Chorev, Michael, additional, Christ, David D., additional, Cramer, Hinrich, additional, Czekalla, Jörg, additional, Duncia, John V., additional, Durroux, Thierry, additional, Elmquist, Barbara J., additional, Fitzpatrick, Timothy D., additional, Gies, J.-P., additional, Grumbach, Isabella M., additional, Habbes, Hans-Werner, additional, Haddad, El-Bdaoui, additional, Haviv, Fortuna, additional, Hazum, Eli, additional, Herblin, William F., additional, Hiley, Robin C., additional, Howl, John, additional, Inagami, Tadashi, additional, Jard, Serge, additional, Jensen, Robert, additional, Kambayashi, Yoshikazu, additional, Lach, E., additional, Lee, Robert J., additional, Lin, Chun Wel, additional, Maggi, Carlo Alberto, additional, Manning, Maurice, additional, Meyer, Karl-Heinz, additional, Miller, Robert C., additional, Miller, Thomas R., additional, Mori, Masatomo, additional, Pelton, John T., additional, Pham, Hoang T., additional, Raynor, Karen, additional, Reeve, Joseph R., additional, Reisine, Terry, additional, Rissler, Klaus, additional, Satoh, Tetsurou, additional, Sawyer, Wilbur H., additional, Schvartz, Iris, additional, Shanahan, Fergus, additional, Shapira, Hagit, additional, Sharif, N.A., additional, Smith, A. Ian, additional, Smith, Ronald D., additional, Spatola, Arno F., additional, Pieter, B.M.W.M. Timmermans, additional, Trachte, George J., additional, Trifilieff, A., additional, Veh, Rüdiger W., additional, Wada, Etsuko, additional, Wexler, Ruth R., additional, Wheatley, Mark, additional, Witte, David G., additional, Wong, Pancras C., additional, and Yamada, Masanobu, additional

Published
1993
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13. Photonic Technologies for Ultra-High-Speed Information Highways I. 40 Gbit/s TDM Components and Subsystems

Author

Bouchoule, S, Lefèvre, R, Legros, E, Devaux, F, Melchior, H, Duelk, M, Hess, R, Lach, E, Bülow, H, Veith, G, Burie, J.R, Cadiou, J.F, Brillouet, F, Hourany, J, Hoffman, D, Sartorius, B, Jepsen, K.S, Clausen, A.T, Buxens, A, Poulsen, H.N, Stubkjaer, K.E, Burkhard, H, Schöll, H.-J, Nesset, D, Kelly, A.E, Marcenac, D, Penty, R.V, and White, I.H

Published
1999
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14. Behaviour of a maraging steel under quasi-static and dynamic compressive loading

Author

Lach, E., Schnitzer, R., Leitner, H., Redjaimia, A., and Clemens, H.

Subjects
Steel, Stainless -- Mechanical properties, Materials -- Testing, Materials -- Analysis, High technology industry
Abstract

Byline: E. Lach, R. Schnitzer, H. Leitner, A. Redjaimia, H. Clemens The class of stainless maraging steels exhibits an excellent combination of very high strength and hardness, ductility and toughness, combined with good corrosion resistance. Due to precipitation hardening 0.2% yield stress values of up to 2.4 GPa can be achieved. In many applications like crash worthiness or ballistic protection the materials are loaded at high strain-rates. The most important characteristic of material behaviour under dynamic loading is the dynamic yield stress. In this work, compression tests have been conducted at strain-rates of the order of 5 x 10−3 s−1 up to 3 x 103 s−1 to study the materials behaviour. In order to investigate the influence of temperature, dynamic compression tests have been performed in the temperature range from −40°C to 300°C. The Johnson-Cook equation has been used to describe the materials behaviour under dynamic loading. From strain-rate jump tests the activation volume was determined in order to identify the dislocation mechanisms which control the thermally activated part of plastic deformation.

Published
2010

17. Friction induced structural modifications of the near-surface layer

Author

Eleod, A., Berthier, Yves, Lach, E., Torkoly, T., Juhasz, Gabor, Colin, Anne-Marie, Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Published
2007

22. Wavelength conversion devices and techniques

Author

Stubkjær, Kristian, Jørgensen, Carsten, Danielsen, Søren Lykke, Mikkelsen, Benny, Vaa, Michael, Pedersen, Rune Johan Skullerud, Poulsen, Henrik Nørskov, Schilling, M., Daub, K., Dütting, K., Idler, W., Klenk, M., Lach, E., Laube, G., Wünstel, K., Doussiere, P., Jourdan, A., Vodjdana, N., and Ratovelomanana, F.

Subjects
Data_CODINGANDINFORMATIONTHEORY
Abstract

Wavelength division multiplexed (WDM) networks are currently subject to an immense interest because of the extra capacity and flexibility they provide together with the possibilities for graceful system upgrades. For full network flexibility it is very attractive to be able to translate the channel wavelengths in an easy way and preferably without opto-electronic conversion. Here, we will first briefly look at advantages of employing optical wavelength converters in WDM networks and next review the optical wavelength conversion devices with emphasis on recent developments.

Published
1996

23. A bit-rate flexible and power efficient all-optical demultiplexer realised by monolithically integrated Michelson interferometer

Author

Vaa, Michael, Mikkelsen, Benny, Jepsen, Kim Stokholm, Stubkjær, Kristian, Schilling, M., Daub, K., Lach, E., Laube, G., Idler, W., Wünstel, K., Bouchoule, S., Kazmierski, C., and Mathoorasing, D.

Abstract

A novel bit-rate flexible and very power efficient all-optical demultiplexer using differential optical control of a monolithically integrated Michelson interferometer with MQW SOAs is demonstrated at 40 to 10 Gbit/s. Gain switched DFB lasers provide ultra stable data and control signals.

Published
1996

24. Up to 20 Gbit/s bit-rate transparent integrated interferometric wavelength converter

Author

Jørgensen, Carsten, Danielsen, Søren Lykke, Hansen, Peter Bukhave, Mikkelsen, Benny, Stubkjær, Kristian, Schilling, M., Daub, K., Lach, E., Laube, G., Idler, W., and Wünstel, K.

Abstract

We present a compact and optimised multiquantum-well based, integrated all-active Michelson interferometer for 26 Gbit/s optical wavelength conversion. Bit-rate transparent operation is demonstrated with a conversion penalty well below 0.5 dB at bit-rates ranging from 622 Mbit/s to 20 Gbit/s.

Published
1996

25. DWDM Transmission at Ultra-High Channel Bitrates: European TOPRATE Project View

Author

Lach, E., Schmidt, M., Witte, M., Schuh, K., Buelow, H., Fuchali, F., Clausen, Anders, Oxenløwe, Leif Katsuo, Sartorius, B., Kazmierski, C., Vorbeck, S., Leppla, R., Le-Rouzic, E., Cuenot, B., Richter, A., Ramos, F., Lach, E., Schmidt, M., Witte, M., Schuh, K., Buelow, H., Fuchali, F., Clausen, Anders, Oxenløwe, Leif Katsuo, Sartorius, B., Kazmierski, C., Vorbeck, S., Leppla, R., Le-Rouzic, E., Cuenot, B., Richter, A., and Ramos, F.

Published
2004

29. 8×107 Gbit/s serial WDM field trial over 500 km SSMF

Author

Vorbeck, S., primary, Breuer, D., additional, Schuh, K., additional, Junginger, B., additional, Lach, E., additional, Idler, W., additional, Klekamp, A., additional, Veith, G., additional, Schneiders, M., additional, Wagner, P., additional, Xie, C., additional, Werner, D., additional, Haunstein, H., additional, Paul, M., additional, Ehrhardt, A., additional, and Braun, R.-P., additional

Published
2009
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42. Field trials with channel bit rates of 160 Gbit/s

Author

Leppla, R., primary, Vorbeck, S., additional, Schneiders, M., additional, Weiershausen, W., additional, Schmidt, M., additional, Witte, M., additional, Buchali, F., additional, Lach, E., additional, Le Rouzic, E., additional, Salaiin, S., additional, Papernyi, S.B., additional, and Sanapi, K., additional

Published
2006
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44. High-Bitrate and High-Capacity Field Transmission Trials

Author

Lach, E., primary, Schmidt, M., additional, Witte, M., additional, Schuh, K., additional, Buchali, F., additional, Bülow, H., additional, Vorbeck, S., additional, Schneiders, M., additional, Leppla, R., additional, Le-Rouzic, E., additional, Salaün, S., additional, Papernyi, S. B., additional, and Sanapi, K., additional

Published
2005
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47. WDM cross-connect cascade based on all-optical wavelength converters for routing and wavelength slot interchanging using a reduced number of internal wavelengths

Author

Pedersen, Rune Johan Skullerud, Mikkelsen, Benny, Jørgensen, Bo Foged, Nissov, Morten, Stubkjær, Kristian, Wunstel, K, Daub, K., Lach, E, Laube, G, Idler, W, Schilling, M, Doussiere, P, Pommerau, F., Pedersen, Rune Johan Skullerud, Mikkelsen, Benny, Jørgensen, Bo Foged, Nissov, Morten, Stubkjær, Kristian, Wunstel, K, Daub, K., Lach, E, Laube, G, Idler, W, Schilling, M, Doussiere, P, and Pommerau, F.

Abstract

Optical transport layers need rearrangeable wavelength-division multiplexing optical cross-connects (OXCs) to increase the capacity and flexibility of the network. It has previously been shown that a cross-connect based on all-optical wavelength converters for routing as well as wavelength slot interchanging can be used to create a robust and nonblocking OXC. However, for an OXC with n fiber inlets each carrying m wavelengths the OXC requires n×m internal wavelengths, which constrains the size of the cross-connect. In this paper we therefore propose and demonstrate an architecture that uses a reduced set of internal wavelengths without sacrificing cross-connecting capabilities. By inserting a partly equipped OXC with the new architecture in a 10-Gbit/s re-circulating loop setup we demonstrate the possibility of cascading up to ten OXCs. Furthermore, we investigate the regenerating effect of the OXC on signals that suffer from interferometric crosstalk

Published
1998

50. All-optical 40 Gbit/s compact integrated interferometric wavelength converter

Author

Jørgensen, Carsten, Danielsen, Søren Lykke, Hansen, Peter Bukhave, Stubkjær, Kristian, Schilling, M., Daub, K., Lach, E., Laube, G., Idler, W., Wünstel, K., Jørgensen, Carsten, Danielsen, Søren Lykke, Hansen, Peter Bukhave, Stubkjær, Kristian, Schilling, M., Daub, K., Lach, E., Laube, G., Idler, W., and Wünstel, K.

Abstract

An interferometric Michelson wavelength converter is presented that combines a speed-optimized semiconductor optical amplifier technology with the benefits of the integrated interferometer showing 40-Gbit/s wavelength conversion. The optimized wavelength converter demonstrates noninverted converted signals as well as converts to both shorter and longer wavelengths. Excellent results are achieved with ~10 dB extinction ratio and more than 25 dB signal-to-ASE (amplified spontaneous emission) ratio (1 nm) for the converted signals at 40 Gbit/s

Published
1997

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