Characterization of an optically pumped ZnO-based 3rd order distributed feedback laser

Daniel Hofstetter; Yargo Bonetti; Esther Baumann; Fabrizio R. Giorgetta; Abdel-Hamid El-Shaer; Andrey Bakin; Andreas Waag; Rüdiger Schmidt-Grund; Marius Grundmann; Mathias Schubert

doi:10.1117/12.762128

15 February 2008 Characterization of an optically pumped ZnO-based 3^rd order distributed feedback laser

Daniel Hofstetter, Yargo Bonetti, Esther Baumann, Fabrizio R. Giorgetta, Abdel-Hamid El-Shaer, Andrey Bakin, Andreas Waag, Rüdiger Schmidt-Grund, Marius Grundmann, Mathias Schubert

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Proceedings Volume 6895, Zinc Oxide Materials and Devices III; 68950J (2008) https://doi.org/10.1117/12.762128
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

An optically pumped ZnO distributed feedback laser operating at 383 nm has been designed, fabricated and characterized. Single mode operation was observed for a wide temperature range between 10 and 270 K. In order to avoid technologically difficult etching of ZnO, a 3rd order diffraction grating was dry-etched into an additional 120 nm-thick Si₃N₄ layer deposited on the ZnO active region. The spectral linewidth of the laser emission was 0.4 nm, whereas an optical pump threshold intensity of 0.12 MW/cm² and a peak output power of 14 mW were seen. The temperature tuning coefficient of the ZnO refractive index was determined from wavelength vs. temperature measurements; a value of 9 × 10^-5 K^-1 was found, in good agreement with literature values.

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Daniel Hofstetter, Yargo Bonetti, Esther Baumann, Fabrizio R. Giorgetta, Abdel-Hamid El-Shaer, Andrey Bakin, Andreas Waag, Rüdiger Schmidt-Grund, Marius Grundmann, and Mathias Schubert "Characterization of an optically pumped ZnO-based 3^rd order distributed feedback laser", Proc. SPIE 6895, Zinc Oxide Materials and Devices III, 68950J (15 February 2008); https://doi.org/10.1117/12.762128

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