Tapered diode lasers and laser modules near 635nm with efficient fiber coupling for flying-spot display applications |
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Authors: | Gunnar Blume Christian Kaspari David Feise Alexander Sahm Bernd Sumpf Bernd Eppich Katrin Paschke |
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Affiliation: | 1. Ferdinand-Braun-Institut, Leibniz Institut f??r H?chstfrequenztechnik, Gustav-Kirchhoff-Str. 4, 12489, Berlin, Germany
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Abstract: | Flying-spot displays require light sources in the red, green and blue with a high optical output power and nearly diffraction limited beams. In this paper we present experimental results of red-emitting, AlGaInP based, tapered diode lasers and their integration into diode laser modules. The laser modules emit a collimated, almost diffraction limited beam with an optical output power as high as 1W at a wavelength close to 635 nm. The tapered laser chips were designed with emphasis on achieving a good beam quality in vertical and lateral directions of a collimated beam. To test the suitability for flying-spot display applications, we performed fiber coupling experiments with a low mode number optical fiber with an etendue as low as 6 × 10?6 mm2 sr. A maximum transmission of 70% of the launched power behind the uncoated fiber as well as a usable power in excess of 580mW were measured. |
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