Abstract
A new application of selective area metalorganic vapour phase epitaxy is demonstrated: fabrication of distributed feedback (DFB) gratings with sub-micron period and modulated coupling coefficient Kc. A SiO2 mask layer defines the InGaAs(P) grating pattern as well as the lateral variation in growth rate and, hence, thickness of the grating. In this way K can be varied along the laser cavity in a controlled and reproducible manner.
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Tidemand-Petersson, P., Albrektsen, O., Møller-Larsen, A. et al. Application of Selective Area MOVPE for DFB Gratings with Modulated Coupling Coefficient. MRS Online Proceedings Library 340, 153–158 (1994). https://doi.org/10.1557/PROC-340-153
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DOI: https://doi.org/10.1557/PROC-340-153