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(a) Schematic diagram of the (110)-oriented front facet of a cm-bar high-power diode laser array. Two of the twenty-five wide single emitters are depicted. (b) and (c) Spectral positions of the and optical transitions, respectively, vs local position along the device designated as . Full circles mark data obtained from the fresh device, whereas open circles mark data obtained after of constant current aging at .
(a) Aging-induced shift of the laser transition vs local position for all cm bars investigated after the first of operation. Full circles, triangles, and squares mark data from Devices A, B, and C, respectively, whereas the corresponding open symbols indicate the results from bars D, E, and F, respectively. The full line represents a fit including all data. (b) Aging-induced redshift of the -lasing transition versus initial transition energy for Device B. The full line represents a linear fit to the data.
Theoretical strain sensitivities for compressive strain in for the and optical transitions in the QW for the particular laser structure investigated in this study.
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