Top hat beam shaping for a high power laser diode bar with a wavelength of 780 – 1100 nm

Moser, H.; Kura, D.; Forrer, H.; Forrer, Martin

doi:10.1117/12.2002043

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2015

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“…This situation is submitted to specific boundary conditions for limited available space in the array situation and material producability. Therefore we investigate the particular effect of vignetting losses in the beam twisting element, being one of the important performance limitations for the micro-optic setup [1][2][3][4][5] The Beam Twister (BT) is a cylindrical 1:1 Kepler beam expander. When put into a collimated beam it works as a mirror along the axis of the BT.…”

Section: Introductionmentioning

confidence: 99%

Beam vignetting effect in micro-optic collimation and transmission for high power diode laser arrays

et al. 2015

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High power diode laser arrays need special micro-optic beamshaping to optimize for collimation and spot focusing. A known and established solution makes use of cylindrical micro-optics for fast axis collimation and subsequent individual twisting of each emitter beamlet by a micro-optic cylindrical telescope array in order to achieve a symmetric beam parameter product. A crucial factor for the overall performance is the achievable transmission to collimation and the fibercoupling efficiency. We present an optical analysis of vignetting effects on the transmission in the beam twisting setup and show an optimization which can be achieved by advanced micro-optic production technologies.

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Section: Introductionmentioning

confidence: 99%