Properties and fabrication of high-order Bragg gratings for wavelength stabilization of diode lasers

J. Fricke, W. John, A. Klehr, P. Ressel, L. Weixelbaum, H. Wenzel and G. Erbert

Published in:

Semicond. Sci. Technol., vol. 27, no. 055009 (2012).

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We report further progress in the design and fabrication of high-order Bragg gratings defined by I-line projection lithography that are implemented in a high-power diode laser. Simulations of surface Bragg gratings with large duty cycles predict large reflectivities even for the 25th Bragg order. We implemented such Bragg gratings in high-power diode lasers and compared the spectral and electro-optical properties with diode lasers having seventh-order Bragg gratings. Details of the fabrication and encapsulation of the Bragg gratings will also be presented.

Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany