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Frank Büllesfeld

Schott AG

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Publication

Featured researches published by Frank Büllesfeld.

Rare-Earth-Doped Materials and Devices VII | 2003

New heavy metal oxide silicate amplifier glass for compact and broadband amplifiers

Frank Büllesfeld; Bernd Drapp; Volker Hagemann; Martin Letz; Ulrich Peuchert; Steffen Reichel; Ruediger Sprengard; Tobias Kaelber; Matthias Brinkmann; Bianca Schreder; Edgar Pawlowski; Sally Pucilowski; Joseph S. Hayden

Properties of a new rare-earth doped heavy metal oxide containing silicate glass are presented. The glass has potential for fabrication of ultra-short wideband fiber and planar waveguide amplifiers. We report specific results for a fiber amplifier geometry, discussing achieved improvements in device compactness (Giles gain g* = 210 dB/m allowing up to 100 times shorter fiber) and amplification bandwidth (50% more bandwidth in C-/L-band) compared to the conventional EDFA. We also access the potential of this material for fabrication of active planar integrated waveguide devices.

Journal of Crystal Growth | 2012

Characterization of mc-Si directionally solidified in travelling magnetic fields

Frank M. Kiessling; Frank Büllesfeld; Natasha Dropka; Ch. Frank-Rotsch; M. Müller; P. Rudolph

Journal of Crystal Growth | 2011

Numerical study on improved mixing in silicon melts by double-frequency TMF

Natasha Dropka; W. Miller; Uwe Rehse; P. Rudolph; Frank Büllesfeld; U. Sahr; D. Reinhardt

Journal of Crystal Growth | 2013

Crystallization of 640 kg mc-silicon ingots under traveling magnetic field by using a heater-magnet module

Ch. Kudla; A.T. Blumenau; Frank Büllesfeld; Natasha Dropka; Ch. Frank-Rotsch; Frank M. Kiessling; O. Klein; P. Lange; W. Miller; Uwe Rehse; U. Sahr; M. Schellhorn; G. Weidemann; M. Ziem; G. Bethin; R. Fornari; M. Müller; J. Sprekels; V. Trautmann; P. Rudolph

Archive | 2006

Production of glass tube comprises redrawing glass tube preform with initial profile and recasting of glass tube preform into glass tube with another profile

Frank Büllesfeld; Paul Kissl

Archive | 2002

Method and device for shaping a structured body and body produced according to said method

Frank Büllesfeld; Paul Kissl; Sabine Lehnicke; Martin Zimmermann; Christian Kunert; Bernd Hoppe; Volker Plapper

Archive | 2005

Glass Powder, Especially Biologically Active Glass Powder, and Method for Producing Glass Powder, Especially Biologically Active Glass Powder

Guido Räke; Hildegard Dr. Römer; Peter Schreckenberg; Jose Zimmer; Frank Büllesfeld; Jörg Hinrich Dr. Fechner; Cevin Czisch; Udo Fritsching

Archive | 2006

Production of glass tube for encapsulating electronic components comprises coaxially inserting starting glass tubes into each other, heating tubes together in heating zone to deform them and joining tubes together

Frank Büllesfeld; Veronika Rehm; Ernst Walter Schäfer

Archive | 2009

Wärmeisolationsanordnung für Schmelztiegel und deren Verwendung sowie Vorrichtung und Verfahren zur Herstellung von ein- oder multikristallinen Materialien

Frank Büllesfeld; Andreas Tittel; Uwe Sahr

Archive | 2009

Apparatus for oriented solidification of melts in crucibles, especially production of mono- or multi-crystalline silicon, comprises induction heater mounted on base of crucible or plate which supports it

Dietmar Jockel; Matthias Müller; Peter Tiesler; Andreas Tittel; Frank Büllesfeld

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Andreas Langsdorf

Schott AG

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Ulrich Lange

Schott AG

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Christian Kunert

Schott AG

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Frank-Thomas Lentes

Schott AG

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Paul Kissl

Schott AG

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Uwe Sahr

Schott AG

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Andreas Tittel

Schott AG

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Bernd Löffelbein

Schott AG

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Bernhard Hunzinger

Schott AG

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Carsten Schumacher

Schott AG

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