Suppression of side lobes in the far field of AlGaAs DH stripe lasers by a Te facet coating
- 1 September 1979
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 35 (5) , 372-373
- https://doi.org/10.1063/1.91155
Abstract
Side lobes observed in the far‐field distribution parallel to the junction plane of DH AlGaAs stripe‐geometry lasers can be suppressed by a self‐aligned facet masking process. A hole, burnt into a Te coating by the laser emission, allows only the main lobe emission to pass. The result supports the attribution of side lobes to refraction tails in the near field typical of a negative refractive index step wave guide as discussed in a previous paper [see R. W. Engelmann, D. Kerps, and F. Nunes, IEEE Quantum Electron. (to be published)].Keywords
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