Room-temperature continuous-wave operation of a single-layered 1.3 mu m quantum dot laser

Room-temperature continuous-wave operation of a 1.3 mu m quantum dot laser is reported. The threshold current for a single layer active region with p- up mounting is only 4.1 mA with a threshold current density of 45 A/cm(2). The minimum room temperature threshold current density is 25 A/cm(2) for pu lsed operation. Cryogenic and temperature dependent measurements are perfor med on broad-area lasers fabricated from the same active material. At 4 K t he broad-area threshold current density for uncoated facets is 6 A/cm(2). ( C) 1999 American Institute of Physics. [S0003-6951(99)04147-9].