High speed uncooled spot-size-converted distributed feedback lasers suitable for passive alignment and 2.5 Gb/s operation at 85/spl deg/C

We demonstrate spot-size-converted distributed feedback lasers (DFB) lasers with narrow far fields capable of high coupling efficiency directly into flat cleaved fiber. We also report, to our knowledge for the first time, 2.5 Gb/s transmission at 85/spl deg/C using a DFB-SSC device. The development of these spot size converted devices is an important enabling technology for integrated module systems.