27 April 2010 Red-emitting tapered diode lasers for display applications
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Abstract
High-brightness tapered diode lasers (TPLs) are an ideal high-luminance light source for display applications such as pocket projectors, laser TVs, laser shows, and projectors for virtual reality simulators, because TPLs have a high optical output power in the visible range with a nearly diffraction-limited beam. We present results of high-power TPLs emitting between 630 nm and 660 nm. The diode lasers have a nearly diffraction-limited beam quality (M2 1/e2 < 3) and a maximum output power up to 1.55 W. A luminous flux of 84 lm and a luminance of 47 Tcd/m2 was achieved with a TPL emitting 0.70 W near 640 nm. Lifetime tests show an operation > 5000 h at a power level of 200 mW.
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G. Blume, D. Feise, H. Dittrich, Chr. Kaspari, K. Paschke, G. Erbert, "Red-emitting tapered diode lasers for display applications", Proc. SPIE 7720, Semiconductor Lasers and Laser Dynamics IV, 77201B (27 April 2010); doi: 10.1117/12.853720; https://doi.org/10.1117/12.853720
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