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.
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Fricke et al. (2012) studied this question.
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