The first single-epitaxy top-emitting vertical-cavity surface-emitting lase
r emitting in the 1.55-1.61 mu m wavelength region is reported. CW operatio
n is achieved up to 55 degrees C with an optical power of 0.45mW obtained a
t 25 degrees C. Error free transmission by these lasers at 2.5Gbit/s is obt
ained over 50km of singlemode fibre without the need for optical amplificat
ion.