High-power, diffraction-limited InGaAsP flared unstable resonators at 840 nm

We report on the high-power, diffraction-limited performance of InGaAsP/GaAs flared devices in three configurations: a Fabry-Perot (FP) unstable resonator, a fiber Bragg grating wavelength-stabilized laser and an external grating tunable laser. In all three configurations over 1.0 W CW diffraction-limited was obtained with up to 2.0 W CW diffraction-limited from FP unstable resonators. In addition, temperature-insensitive operation and wavelength tunability was achieved using the fiber Bragg grating and external grating, respectively.