Paper
17 February 2010 Demonstration of high pointing accuracy dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate
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Abstract
We present our work on a single optical component that combines fast-axis smile and lens error correction with slowaxis collimation, produced with a laser-cut phase-plate technique. Customized focal length of slow-axis lenses allows optimization of fill-factor of diode laser bars. In this paper we report on excellent beam properties obtained for a 49- single mode emitter array, 975 nm bar providing 30W cw output, with RMS pointing error of 3% and 6% of far-field divergence in fast- and slow-axis, respectively. We observed a pitch mismatch of 0.03% between the slow-axis lens array, with emitter pointing clearly affected by chip thermal expansion.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Natalia Trela, Howard J. Baker, Jozef J. Wendland, and Denis R. Hall "Demonstration of high pointing accuracy dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate", Proc. SPIE 7583, High-Power Diode Laser Technology and Applications VIII, 75830Y (17 February 2010); https://doi.org/10.1117/12.842197
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KEYWORDS
Collimation

Semiconductor lasers

Thermal effects

Diodes

Laser systems engineering

Manufacturing

Spherical lenses

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