Coupled semiconductor injection laser devices

Claim 1

A RADIANT ENERGY DEVICE COMPRISING: (A) FIRST AND SECOND SEPARATED SEMICONDUCTOR INJECTION LASERS EACH CONSITUTED OF A CRYSTALLINE BODY HAVING A JUNCTION BETWEEN ADJACENT REGIONS OF DIFFERENT CONDUCTIVITY CHARACTERISTICS AND INCLUDING A RECOMBINATION RADIATION REGION FOR PRODUCING STIMULATED EMISSION RADIATION WHEN CURRENT ABOVE A THRESHOLD VALUE IS CAUSED TO FLOW ACROSS SAID JUNCTION; (B) EACH OF SAID INJECTION LASERS HAVING FIRST AND SECOND SURFACES ON OPPOSITE ENDS OF THE CRYSTALLINE BODY WHICH ARE REFLECTIVE AND FORM WITH THE LASER REGION AN OPTICAL CAVITY IN WHICH SAID STIMULATED EMISSION RADIATION IS PROPAGATED; (C) SAID LASER REGIONS OF SAID FIRST AND SECOND INJECTION LASERS BEING ALIGNED IN AN ESSENTIALLY COMMON PLANE TO CAUSE STIMULATED EMISSION RADIATION PRODUCED IN THE LASER REGION OF ONE OF SAID INJECTION LASERS TO PROPAGATE ALONG THE LASER REGION OF THE OTHER OF SAID INJECTION LASERS; (D) AND CURRENT SUPPLY MEANS FOR SUPPLYING TO SAID FIRST LASER A FIRST CURRENT LESS THAN SAID INDIVIDUAL THRESHOLD CURRENT FOR SAID FIRST LASER AND FOR SUPPLYING TO SAID SECOND LASER A SECOND CURRENT LESS THAN SAID INDIVIDUAL THRESHOLD CURRENT FOR SAID SECOND LASER; (E) SAID FIRST AND SECOND CURRENTS WHEN INDIVIDUALLY APPLIED BEING INSUFFICIENT TO PRODUCE STIMULATED EMISSION RADIATION IN EITHER OF SAID CAVITIES AND A COHERENT RADIATION OUTPUT FROM SAID DEVICE BUT BEING EFFECTIVE WHEN CONCURRENTLY APPLIED TO PRODUCE STIMULATED EMISSION RADIATION AND PROVIDE A COHERENT RADIANT ENERGY OUTPUT FROM SAID DEVICE.