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A novel design for beam forming grating couplers

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Edge-emitting laser diodes need astigmatic lenses for collimating and focusing the laser beam. The integration of the element on chip offers a more elegant solution. A grating is etched into the cladding of the planar waveguide. Beam forming can be achieved by modulating the grating parameters or by using a tapered cladding. These two possibilities are discussed in this paper.
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Keywords: Waveguide; beam-forming; beam-outcoupling; grating coupler; tapered cladding

Document Type: Original Article

Affiliations: 1: Leica-Geosystems, 9435 Heerbrugg, Switzerland 2: Leister-Technologies, 6600 Sarnen, Switzerland 3: Carl Zeiss Oberkochen CZO, 73446 Oberkochen, Germany 4: INA Wälzlager Schaeffler oHG, 91072 Herzogenaurach, Germany 5: Lehrstuhl für Optik, Universität Erlangen-Nürnberg, Staudtstrasse 7, 91058 Erlangen, Germany

Publication date: 01 February 2001

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