Pulsed laser arrangement

Claim 1

IN A PULSED LASER THE IMPROVEMENT COMPRISING IN COMBINATION: MEANS FOR GENERATING A BEAM OF OPTICALLY ORIENTABLE PARTICLES; MAGNETIC FIELD GRADIENT GENERATING MEANS FOR SUBJECTING SAID BEAM OF OPTICALLY ORIENTABLE PARTICLES TO A STRONG UNIDIRECTIONAL MAGNETIC FIELD GRADIENT TO SPLIT SAID BEAM OF OPTICALLY ORIENTABLE PARTICLES INTO A PLURALITY OF SECONDARY BEAMS AND EACH OF SAID PLURALITY OF SECONDARY BEAMS SUBSTANTIALLY HOMOGENEOUS IN OPTICALLY ORIENTABLE PARTICLES HAVING ENERGY IN A PRESELECTED ENERGY LEVEL; A LASER CELL HAVING WALLS DEFINING A CAVITY, A FIRST PORTION OF SAID WALLS COMPRISING A PASSAGEWAY FOR COMMUNICATING REGIONS EXTERNAL SAID LASER CELL WITH SAID CAVITY AND SECOND PORTIONS OF SAID WALLS TRANSPARENT TO PRESELECTED WAVELENGTHS OF ELECTROMAGNETIC RADIATION AND THIRD PORTIONS OF SAID WALLS COMPRISING A PAIR OF SUBSTANTIALLY FLAT, PARALLEL AND OPPOSITELY-DISPOSED END MEMBERS REFLECTIVE OF PRESELECTED WAVELENGTH OF ELECTROMAGNETIC RADIATION IN SAID CAVITY, AND ONE OF SAID END MEMBERS PARTIALLY TRANSPARENT TO SAID PRESELECTED WAVELENGTH OF ELECTROMAGNETIC RADIATION, AND SAID PASSAGEWAY REGISTRABLY ALIGNED WITH A FIRST OF SAID PLURALITY OF SECONDARY BEAM OF OPTICALLY ORIENTABLE PARTICLES HAVING ENERGY IN A FIRST PRESELECTED ENERGY LEVEL; OPTICAL PUMPING LIGHT GENERATING MEANS FOR GENERATING AN OPTICAL PUMPING LIGHT BEAM OF ELECTROMAGNETIC RADIATION; MEANS FOR CIRCULARLY POLARIZING SAID OPTICAL PUMPING LIGHT BEAM; SAID OPTICAL PUMPING LIGHT BEAM GENERATING MEANS POSITIONED TO IRRADIATE SAID FIRST PRESELECTED SECONDARY BEAM OF OPTICALLY ORIENTABLE PARTICLES ADJACENT THE ENTRANCE TO SAID PASSAGEWAY TO INDUCE ENERGY TRANSITIONS OF PARTICLES INTO SAID FIRST PRESELECTED ENERGY LEVEL; MEANS FOR MAINTAINING SAID PARTICLES IN SAID CAVITY AT A PRESELECTED PRESSURE; TRIGGER LIGHT GENERATING MEANS FOR GENERATING AN INTENSE BEAM OF ELECTROMAGNETIC RADIATION; MEANS FOR CYCLICALLY OPERATING SAID TRIGGER LIGHT GENERATING MEANS; AND MEANS FOR IRRADIATING SAID PARTICLES IN SAID CAVITY WITH SAID INTENSE BEAM OF ELECTROMAGNETIC RADIATION TO INDUCE ENERGY TRANSITIONS OF SAID PARTICLES FROM SAID FIRST PRESELECTED ENERGY LEVEL TO A SECOND PRESELECTED ENERGY LEVEL HIGHER THAN SAID FIRST PRESELECTED ENERGY LEVEL WHEREBY AN OVERPOPULATION OF SAID SECOND PRESELECTED ENERGY LEVEL WITH RESPECT TO A THIRD ENERGY LEVEL OF SAID OPTICALLY ORIENTABLE MEDIUM IS INDUCED, AND SAID PARTICLES UNDERGO A SPONTANEOUS DECAY FROM SAID SECOND PRESELECTED ENERGY LEVEL TO SAID THIRD ENERGY LEVEL AND A STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IS INDUCED AND A COHERENT BEAM OF ELECTROMAGNETIC RADIATION IS EMITTED THROUGH SAID PARTIALLY TRANSPARENT MEMBER.