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Lichtenstein et al 2010, Scalable, high power line focus diode laser.pdf559,55 kBAdobe PDFView/Open
Title: Scalable, high power line focus diode laser for crystallizing of silicon thin films
Authors: Lichtenstein, N.Baettig, R.Brunner, R.Müller, J.Valk, B.Gawlik, A.Bergmann, J.Falk, F.
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Issue Date: 2010
Published in: Physics Procedia Vol. 5 (2010), No. 1
Publisher: Amsterdam : Elsevier
Abstract: We present the design and performance of a diode laser module producing a high intensity line focus at 808 nm for material processing. The design is based on a linear array of 7 laser bars and beam forming optics featuring a micro-optic homogenizer. The module delivers a total output power of 900 W at 140 A and peak intensity created in the focus area of 10.3 kW/cm2. Two systems with line length of 5 cm and 10 cm at a large working distance of 110 mm have been realized. The chosen concept allows scaling in length by joining multiple modules which is of interest for material processing in industrial applications. Application results from laser crystallization of amorphous silicon seed layers used in the fabrication of photovoltaic cells for solar panels are given.
Keywords: Amorphous silicon; Homogenizer; Laser crystallization; Laser diode; Line focus; Material processing; Optics; Photovoltaic; Amorphous silicon; Diodes; Metal forming; Optics; Photoelectrochemical cells; Photovoltaic cells; Power semiconductor diodes; Semiconductor lasers; Silicon; Solar power generation; Homogenizers; Laser crystallization; Line-focus; Material processing; Photovoltaic; Laser materials processing
DDC: 530
License: CC BY-NC-ND 3.0 Unported
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