Compact long-life high PRF 722.9 nm neutral lead vapor laser

Rocks (VDE/NTG) und Ralf Th. Kersten (VDE/NTG)* Übersicht: Unter Berücksichtigung praktisch realisierter Bauelemente wird die Übertragungskapazität von optischen Frequenzmultiplex-Systemen berechnet. Es wird gezeigt, daß Systeme mit nur einer optischen Frequenz bei Übcrtragungsratcn zwischen 140 Mbit/s und 280 Mbit/s eine größere überbrückbare Verstärkerfeldlänge aufweisen können. Im weiteren wird ein neuartiges optisches Frequenzmultiplex-System vorgeschlagen und berechnet, das bei Monomode-Wellenleitern in Verbindung mit optischen Heterodyn-Empfangsverfahren unter Einsatz integriert optischer Bauelemente eine weitere Erhöhung der Verstärkerfeldlänge zuläßt.Abstract: Taking into account parameters of realized components for optical frequency division multiplex systems (usually called wavelength division multiplex system) with multimode graded index fibers, it is shown that such a system operating with transmission rates between 140 Mbit/s and 280 Mbit/s has no advantage compared to a single wavelength system working at an optimum wavelength. Therefore a new optical frequency division multiplex system with very small optical frequency separation of some GHz in connection with a single-mode fiber and heterodyne receiver is proposed. The components for such a future system can be realized by using integrated optics. Für die Dokumentation: Lichtleitübertragungssystem / Verstärkerfeldlähge / Optisches Frequenzmultiplex / Wellenlängenmulliplex / Multimode-Gradientenprofil-Lichtwellenleiter / Monomode-Lichtwellenleiter / Optischer Hcterodynempfang * Dr.-Ing. M. Rocks, Forschungsinstitut der Deutschen Bundespost beim Femmeldetechnischen Zentralamt. Außenstelle Berlin. Prof. Dr. phil. R. Th. Kersten.

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High Speed Guided-Wave Optical Modulators

Sueta¹,

Izutzu²

1982

Journal of Optical Communications

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Design and fabrication techniques of wide-band or highspeed guided-wave electrooptic modulators are reviewed. It is shown that the traveling-wave type operation is promising because of the large bandwidth possible, even with velocity mismatching. Also the modulating electrodes, an asymmetrical planar strip line, is adequate for wide-band operation owing to the small discontinuity effect at the feeding and terminating ends.Various types of guided-wave modulators were constructed and tested. One of these, a push-pull interferometer type intensity modulator was operated successfully up to 18 GHz. Its half-wave voltage and extinction ratio were 8.8 V and 98 % at 0.633 μπι, respectively. The l/J/2 bandwidth was 11.2 GHz, and P/Af figure for 88% intensity modulation (or 1 rad peak retardation) was 11.6 μ\Μ/ΜΗζ. Possible applications of high-speed guidedwave components are also discussed.

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Compact long-life high PRF 722.9 nm neutral lead vapor laser

Cited by 4 publications

References 2 publications

The operating regime of longitudinal discharge copper vapour lasers

The operating regime of longitudinal discharge copper vapour lasers

Optische Multiplex-Systeme in der optischen Nachrichtentechnik

High Speed Guided-Wave Optical Modulators

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