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High-Power 980-nm Broad-Area Lasers Spectrally Stabilized by Surface Bragg Gratings

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9 Author(s)
Fricke, J. ; Ferdinand-Braun-Inst. fur Hochstfrequenztechnik, Berlin, Germany ; Bugge, F. ; Ginolas, A. ; John, W.
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We report on broad-area distributed Bragg reflector (DBR) lasers with a stripe width of 90 ??m providing up to 14-W optical power and 50% maximum conversion efficiency. Ninety-five percent of the power is included within a wavelength range of less than 1 nm. The wavelength shift between threshold and the maximum output power is less than 3.5 nm. The wavelength stabilization is achieved with a 500-??m -long DBR containing a sixth-order Bragg grating defined by i-line wafer stepper lithography and fabricated by reactive ion etching.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 5 )