Modeling and analysis of birefringence in magneto-optical thin film made by SiO2/ZrO2 doped with ferrite of cobalt |
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Authors: | A. Hocini T. Boumaza M. Bouchemat F. Choueikani F. Royer J. J. Rousseau |
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Affiliation: | (1) Source Photonics, Inc., 20550 Nordhoff St., 91311 Chatsworth, CA, USA;; |
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Abstract: | We report the device characteristics of the metal–dielectric high-reflectivity (HR) coated 1.55 μm laterally coupled distributed feedback (DFB) laser with metal surface gratings by using holographic lithography. The HR coating films are composed of Au/Ti/SiO2. It provides a variety of advantages compared to the uncoated DFB laser on the same processed wafer while there is no degradation on current–voltage characteristics. For 3 μm wide and 300 μm long HR coated DFB laser, it exhibits a maximum output power of ∼17 mW and a threshold current of 14.2 mA at 20°C under continuous-wave mode. It is clear that the threshold current and slope efficiency are improved by 36% and 96%, respectively, due to the reduction of mirror loss. The metal–dielectric HR coating on one facet of DFB laser is found to have significantly increased characteristic temperature (i.e., T 0∼88 K). Furthermore, the stable single-mode operation with an increased single-mode suppression ratio was achieved. |
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