High-power, diffraction-limited-beam operation from diode-laser phase-locked arrays operating in coupled first-order modes

Mawst, L. J.; Botez, D.; Roth, T. J.
October 1988
Applied Physics Letters;10/3/1988, Vol. 53 Issue 14, p1236
Academic Journal
A novel index-guided, wide-waveguide coupled array structure grown entirely by metalorganic chemical vapor deposition has been demonstrated, which operates in a stable high-order array mode, remaining nearly diffraction limited to high drive currents (>5Ith ) and high-power levels (145 mW/uncoated facet). Strong lateral mode confinement (Δneff ≊1×10-2 ) at the element level coupled with the wide-waveguide geometry ensures operation in coupled first-order element modes. The out-of-phase operating array structure has interelement coupling that becomes stronger with increasing drive level, thereby offering stability against gain spatial hole burning at both the array level and the individual element level.


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