Experimental properties of injection lasers. VI. Mode powering in narrow-stripe and wide sawed lasers

摘要

The modal power distribution is measured at full power for a 10-μm-wide oxide stripe laser and compared with a 100-μm-wide laser with sawed sides prepared from the same (AlGa)As double heterojunction wafer. Simple scaling of the results according to cavity width reveals a striking similarity in their modal power distributions. the critical power per mode describing the lasing nonlinearity is found to be 10 mW and independent of type of mode, of internal structure of cavity, of lateral current confinement, and of facet area.