4.5 W Hybrid Integrated Master-Oscillator Power-Amplifier at 976 nm on Micro-Optical Bench

摘要

Compact high power laser light sources emitting a single frequency with diffraction limited beams in continuous-wave (CW) operation are required for many applications including frequency conversation. We present a hybrid integrated package consisting of a distributed feedback ridge-waveguide master-oscillator-power-amplifier mounted on an AlN micro-optical bench with a CW output power of 4.5 W at 976 nm having a beam propagation ratio of M~2 < 2 (including second order moments). The longitudinal mode emission has a linewidth of λ < 10 pm. Due to thermal decoupling the wavelength shift is nearly independent of the amplifier pump-current.