Low threshold, high reliability 1.3 /spl mu/m PACIS (p-substrate Al-oxide confined inner stripe) lasers and application to laser arrays

1.3 /spl mu/m Al-oxide confined inner stripe lasers and laser arrays on p-InP substrate (PACIS) have been fabricated as light sources for parallel data transmission. An Al/sub 0.48/In/sub 0.52/As layer lattice-matched to InP is used as the oxidised layer. A fabricated PACIS laser shows a low threshold current of 4.0 mA and a high slope efficiency of 0.6 W/A, resulting from the good current blocking characteristics of the oxidised layer. High reliability over a driving time of >4000 h at 85/spl deg/C, 5 mW has been realised. A 22-channel PACIS laser array has an average threshold current of 3.98 mA with standard deviation of 0.42 mA.