Reliable high-temperature 50-70 mW CW operation of 659-nm window-mirror laser diodes

A window-mirror laser diode (LD) with a long cavity length of 900-/spl mu/m lasing at 658.8 nm has shown a kink-free maximum output power of 141 mW. Even at 80/spl deg/C, CW maximum output power of 95 mW is obtained. Highly reliable operation for over 2,000 hours under the CW conditions of 70 mW at 60/spl deg/C and 50 mW at 70/spl deg/C has been realized, for the first time.