Characteristics of 680 nm-visible laser diode with MQB grown by MOCVD

The authors introduced MQB (multiquantum barrier) structure grown by metal-organic chemical vapor deposition in an AlGaInP visible laser and improved the laser characteristics. The threshold current at 70 degrees C is reduced from 70 mA to 56 mA, and the characteristic temperature in the range over 70 degrees C is improved from 52 K to 69 K. This improvement is due to the suppression of carrier overflow by the MQB structure. This is a kind of electron wave interference device working at room temperature.<>