1.3 micron InGaAsP distributed feedback laser.

The fabrication and performance characteristics of 1.3 micron InGaAsP distributed feedback (DFB) double channel planar buried heterostructure (DCPBH) laser are reported. The lasers utilize a second order grating with a periodicity of ~3800angstroms for a frequency selective feedback. The lasers have threshold currents in the range 25-35 mA at 30C. The lasing mode shifts to longer wavelengths with increasing temperature at 1 angstrom/C. The dynamic linewidth under 40 mA current modulation is ~1angstrom. The cw linewidth at an output power of 1 mW is ~90 MHz. A monolithically integrated thermoelectric controlled laser diode utilizing the DFB-DCPBH laser structure has been fabricated. The emission frequency of the laser can be continuously tuned by +-4angstroms using a 50mA controller. current.