5-WAVELENGTH SURFACE-EMITTING LASER-DIODE ARRAY BASED ON POSTGROWTH ADJUSTMENT OF EMISSION WAVELENGTH

A five-wavelength surface emitting laser diode array based on surface mode emission is reported. The wavelength control is achieved by postg rowth adjustment of the surface structure. Wavelength spacing between laser groups is 1.1 nm in average and the wavelength reproducibility i s +/-0.13 nm. The total change in the emission wavelength over the arr ay is 4.78 nm. The single array elements show single mode emission wit h a full width at half-maximum of 0.08 nm in average and a side mode s uppression ratio up to 20 dB. This type of laser diode is of high inte rest for wavelength division multiplexing applications. (C) 1997 Ameri can Institute of Physics.