A very low threshold current of 3.0mA and a stable transverse mode ope
ration of > 30mW were achieved in 1.3 mu m InAsP strained-laver quantu
m well Al-oxide confined inner stripe (ACIS) lasers. Strain-compensate
d AlAs/InP/AlInAs super-lattice layers. grown on InP substrate using g
as source-MBE, are used for oxidation.