SURFACE EMITTING LASER

摘要

The laser comprises an active layer (4) with edges cleaved and/or dry etched so that the electromagnetic radiation undergoes total internal reflection. The layer is bounded on one face by a laser substrate (7) and on the other by a Bragg grating having lattices extending in second (11) and first (12) orthogonal directions, each of pitch related to that of the other and to the desired wavelength of the laser. Adjacent the substrate (7) is a heat sink (40), which acts as return path for electrical energy. Adjacent the grating (11, 12) is an electrode layer (24) having a window (26) through which the output laser energy (42) is radiated.