Influence of stripe geometry on the properties of GaAs-GaAlAs edge emitting LED.'s is described in this paper.The output power

near field pattern

beam divergence

coupling efficency and frequency response can be improved as the stripe width is reduced.A calculation of the effect of stripe width about the lateral current spreading and optical field distribution has been made.The agreement obtained between calculation and experimental results is very good in our cases.Devices with very narrow stripe width tend to heat up the device and cause a rapid saturation of power as the current is too crowded.Since the lateral light intensity spreading increases as the stripe width is reduced

a preferable stripe width is about 10 to 15μm.Through a reasonable compromise

edge-emitting diodes with more than 100μW output power at the end of a standard GI fiber pigtail at low injection current of 100mA has been obtained.Optical bandwidth of more than 100MHz is also achieved at some current level.The highest emitting power obtained is 130μm with a bandwidth of 136MHz at 100mA driving current.