Monolithically integrated external feedback InGaAsP lasers using stop cleaving technique.
01 January 1986
We have developed a monolithically integrated external feedback laser utilizing a pair of stop-cleaved double channel planar buried heterostructure lasers emitting at 1.3microns. The external feedback is provided by the stop cleaved facet of the second cavity. A sidemode rejection ratio of 200:1 has been obtained with a laser having a 250 micron cavity length and an external resonator length of 200 microns. Since both lasers are fabricated in a self aligned structure, this device may prove to be a powerful scheme for injection locking to reduce dynamic linewidth.