Electrically pumped semiconductor laser with low spatial coherence and directional emission
arXiv:1905.03671 · doi:10.1063/1.5109234
Abstract
We design and fabricate an on-chip laser source that produces a directional beam with low spatial coherence. The lasing modes are based on the axial orbit in a stable cavity and have good directionality. To reduce the spatial coherence of emission, the number of transverse lasing modes is maximized by fine-tuning the cavity geometry. Decoherence is reached in a few nanoseconds. Such rapid decoherence will facilitate applications in ultrafast speckle-free full-field imaging.
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- Sensitive control of broad-area semiconductor lasers by cavity shape