Near-diffraction-limited high power (~1 W) singlelongitudinal mode CW diodelaser tunable from 960 to 980 nm

Abstract
The authors report near-diffraction-limited high power (~1 W), single longitudinal mode emission from a 960 – 980 nm tunable CW diode laser, consisting of an unstable resonator tapered amplifier structure in a grating-tuned external cavity. > 3 W output powers were obtained near the gain peak (~970 nm) from the grating-tuned diode laser in a quasi-CW mode (500 µs, 100 Hz) of operation.