Monolithic dual-wavelength high-power lasers for CD-R/DVD /spl plusmn/ R/RW/RAM

The monolithic integration of a GaInP-based high-power red laser for DVD /spl plusmn/ R/RW/RAM and an AlGaAs-based high-power infrared laser for CD-R was successfully achieved for the first time. The monolithic device provides reliable output power of 200 mW for red lasers and 240 mW for infrared lasers, allowing writing speeds of 12/spl times/ for DVD-R and 48/spl times/ for CD-R. The kink power of AlGaInP DVD lasers is dramatically improved up to 300 mW from 220 mW even at the high temperature of 85/spl deg/C, due mainly to the reduction of the lateral leakage current. The beam separation is precisely controlled to be within 110/spl plusmn/1 /spl mu/m despite forming separately two ridge stripes.