Advancements in GaN DFBs with embedded gratings and a path to higher power

GaN-based distributed feedback (DFB) laser diodes are narrow linewidth sources promising for integration into low-size, weight, and power photonic circuits. There is a need to improve the linewidth, expand the availability of technologically useful wavelengths, and increase the power and efficiency for several applications. BluGlass presents advancements in visible wavelength DFB lasers. We will show measured device results achieving higher side-mode-suppression ratio of 40dB and a peak full-width half maximum under 3pm demonstrating near single frequency emission. Devices targeting critical atomic transition wavelengths for clocks, quantum computing, and other cold physics applications are covered spanning from 408nm to 470nm. A path toward narrow-band high-power DFB sources will be presented with preliminary data on gain in GaN-based semiconductor optical amplifiers.