High-Power DBR-Tapered Laser at 980 nm for Single-Path Second Harmonic Generation

We present experimental results about edge-emitting distributed-Bragg-reflector-tapered diode lasers emitting at 980 nm. The investigated lasers show an output power of up to 12 W with a conversion efficiency of about 45%. The lasers also exhibit a small vertical divergence <15deg full-width at half maximum (FWHM), a nearly diffraction-limited beam quality, and a narrow spectral linewidth with FWHM smaller than 12 pm. These properties allow efficient single-pass second harmonic generation with power levels of more than 1 W at 488 nm.