Faculté des sciences

Beam Shaping of High-power Laser Diode Arrays by Continuous Surface-relief Elements

Ehbets, Peter ; Herzig, Hans-Peter ; Dändliker, René ; Regnault, P. ; Kjelberg, I.

In: Journal of Modern Optics, 1993, vol. 40, no. 4, p. 637-645

A breadboard for beam shaping of high-power laser diode arrays (LDAs) has been realized. The coherent beams are added with the aid of a continuous surface-relief fan-in element. It results in a nearly symmetric single lobed beam of collimated light with maximum conversion efficiency. The theoretical efficiency is determined to be 96•7%. Experimentally, one third of the total power is now in the... Plus

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    Summary
    A breadboard for beam shaping of high-power laser diode arrays (LDAs) has been realized. The coherent beams are added with the aid of a continuous surface-relief fan-in element. It results in a nearly symmetric single lobed beam of collimated light with maximum conversion efficiency. The theoretical efficiency is determined to be 96•7%. Experimentally, one third of the total power is now in the central peak.