The breakthrough technology in dry fiber fabrication has opened the possibility for using fiber bandwidths all the way from 1.3 to 1.6£gm. However, the fiber amplifier used in commercial product, such as erbium-doped fiber amplifier (EDFA), can not fully cover the whole fiber bandwidths from 1.3 to 1.6£gm with a single fiber amplifier. Recently, the Cr4+-doped fiber has shown a broadband emission from 1.3 to 1.6£gm. Therefore, it is interesting to develop a single fiber amplifier which can operate the wide bandwidth of the 1.3~1.6£gm emission. In this study, we have successfully fabricated and measured the Cr-doped fibers by using a commercial drawing-tower technique and a rod-in-tube method. The core diameters were 26 and 16£gm. The Cr4+ fluorescence spectrum showed a broadband emission from 1.2 to 1.6£gm. The radiation intensity was up to the order of nW. This indicates that the new Cr-doped fibers may be used as a broadband fiber amplifier. The advantages of using the drawing tower to fabricate the Cr-doped fibers are to have a better control of the core diameter, the fiber uniformity and circularity. Therefore, the Cr-doped fibers may have a potential for commercial production and application to lightwave communication systems.

Thesis (Doctoral)--Katholieke Universiteit Nijmegen, 1998. / Includes bibliographical references.

Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2002. / Includes bibliographical references.

Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2004. / Includes bibliographical references.

Thesis (M.S.)--Middle East Technical University, 2003. / Keywords: city form, city structure, urban design, development control, Ankara.

The modern American city is organized into a multitude of spaces based upon function and use. These organized spaces dictate a prescribed behavior and social awareness resulting in a landscape of ill-fitting and awkward territories existing in opposition to one another. An unintended byproduct of these collisions is the counter-space. Akin to slag, sludge and waste resulting from modern industrial processes, the counter-space is the left-over and neglected space of the city resulting from the ever increasing hegemony of society. Hidden within plain site, abandoned and unused, these spaces exist everywhere. This thesis seeks to understand and reveal these counter-spaces and their subsequent populations within the city of Atlanta in order to bring an awareness to the design of the city for all populations. The spatial-temporalities of counter-spaces will be understood through a de-territorialization of representation through notation and mapping. Through this act, a “cartography of events” will be created for each counter space using series of notation machines in which temporal stimuli from each counter-space site will be used as inputs for the machines.

In this paper, the imagery of public exhibition spaces, museums, and public collections is discussed in relationship to my body of work. I engage ideas of stillness, the creation of alternate realities, and how preconceptions shape interpretation. My interest in stillness and the activation of captured moments is expressed through the relationship between Cabela’s and my photographic archive. By compositing and reconstructing these images, I shift the viewer’s perception of reality. I thus explore how these aesthetic considerations generate fictitious interpretations. Dependent upon the viewer, my drawings transform the reality of the photographic so that we are confronted by the nature of our preconceptions. / text

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