Micro parts for macro power: efficient beam shaping optics for high-power diode lasers

Ruebenach, O.; Hambuecker, Stefan; Sinhoff, V.

doi:10.1117/12.588673

Cited by 4 publications

(2 citation statements)

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“…Using sophisticated micro-optics which rotates the near-field of each emitter in a bar by 90°, a coupling efficiency up to ~82% is expected if the SA-divergence is kept below 10° (95% power inclusion angle) [11] .…”

Section: Slow-axis Divergencementioning

confidence: 99%

“…≥50%, to minimize failure by catastrophic optical-damage (COD) whereas for coupling into a small core fiber, the fill-factor needs to be low, e.g. ≤20%, to allow space for the microoptics to collimate the laser beam along the slow axis [11] . For this study, we use the example of a 20% fill-factor bar and a 200μm core, 0.22NA fiber.…”

Section: Laser-diode Barmentioning

confidence: 99%

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Record CW-brightness from a single 20% fill-factor 1-cm laser-diode bar at 20°C

Chin¹,

Knapczyk

Jacob

et al. 2011

SPIE Proceedings

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A record, 250W, CW output-power has been achieved for a single, 1cm-wide, 3.5mm cavity-length, 20% fill-factor, 976nm, laser-diode bar operated at 20°C. The remarkable laser-bar performance was in part the result of a novel EPIC (Enhanced Performance Impingement Cooler) heat-sink with a thermal resistance of 0.16K/W. The superb thermal management resulted in record brightness for a laser bar, i.e. a slow-axis divergence of 10° (95% power containment angle) was achieved at 200W output-power. A coupling efficiency of ~74% into a 200μm core, 0.22NA fiber was achieved.

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Section: Slow-axis Divergencementioning

confidence: 99%

Section: Laser-diode Barmentioning

confidence: 99%