Data are presented demonstrating the continuous (cw) operation (10-50 °C) of coupled-stripe In0.5(AlxGa1-x) 0.5P-In0.5Ga0.5P multiple quantum well heterostructure (QWH) visible (λ∼655 nm) laser arrays. The ten stripe QWH arrays (3 μm emitters on 4 μm centers) are defined by "wet" oxidation (H2O vapor in N2 carrier gas, 550 °C) of the high gap In0.5(AlxGa1-x)0.5P upper confining layer outside of the active stripes. The gain-guided arrays exhibit relatively low cw 20 °C threshold current densities (∼1.6 kA/cm2, ∼450 μm cavity) and high output powers of 25 mW per uncoated facet (cw, 20 °C). Optical coupling between stripes results in a near diffraction-limited single-lobe far-field pattern indicative of oscillation in the lowest order supermode of the array (in-phase operation).
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)