Abstract

We have studied quantum well (QW) laser diodes grown with a pair of Bragg reflectors acting as cladding layers. The high reflectance band of each Bragg structure is designed to be spectrally coincident with the spontaneous emission of the QW, while the resonance of the Fabry–Perot etalon consisting of the two Bragg reflectors is outside the high reflection band of each Bragg reflector and the spontaneous emission band of the QW. In such a structure, spontaneous emission normal to the laser cavity is inhibited because of the lack of modes at the corresponding wavelengths, and therefore the threshold current should be reduced.

© 1994 IEEE