600 MW CW SINGLE-MODE GAALAS TRIPLE-QUANTUM-WELL LASER WITH A NEW INDEX-GUIDED STRUCTURE

A very-high-power and single-mode GaAlAs triple-quantum-well (TQW) laser with a new real refractive index guided structure has been developed. The maximum output power of 720 mW CW and single transverse- and longitudinal-mode operation up to 600 mW CW have been achieved for the first time in a single-element device. This excellent mode operation is attained by using the real refractive index guided structure with a GaAlAs current-blocking layer which gives a low effective refractive index step, suppressing spatial hole-burning effect in the high-power range.