Single mode CW operating InP based quantum dash distributed feedback lasers at 1.5 to 1.9 /spl mu/m

In this paper the device properties of single mode lasers based on this new quantum-dash material will be presented. The laser structures were grown by solid-source MBE. They consist of a 1.7 /spl mu/m top InAlAs cladding and a 400 nm thick waveguide layer, which is based on a graded index separate confinement heterostructure (GRINSCH). Laser ridges with a width of 3 /spl mu/m were defined by photolithography. All the lasers show a very stable single mode emission with side mode suppression ratios (SMSR) well above 45 dB.