High-power, high-brightness shortwave infrared lasers

Abstract

High-power spatially single-mode diode lasers at 15xx nm wavelengths are of interest for Light Detection and Ranging (LIDAR) at eye-safe wavelengths, as pump lasers for Raman and rare-earth doped fiber amplifiers as well as for material processing. A cost-efficient way to realize high-power in combination with high brightness is the tapered resonator concept. We have grown by MOCVD InGaAsP/InP based diode lasers and tapered amplifiers with fast axis far fields of $36^{\circ}$ FWHM and wavelengths around 1550 nm. CW output power of more than 3.7W for tapered lasers and 2.3W for tapered amplifiers in MOPA configuration have been demonstrated.