Coherent light oscillators

Claim 1

LASER SYSTEM COMPRISING: A NEGATIVE TEMPERATURE MEDIUM CONTAINING ATOMS HAVING THE PROPERTY THAT, WHEN THEY ARE STRUCK BY STIMULATING PHOTONS, THEY EMIT A CASCADE OF COHERENT PHOTONS, SAID MEDIUM PROVIDING A PATH WITHIN THE MEDIUM ALONG WHICH A COLLECTION OF SUCH COHERENT PHOTONS CAN BUILD UP INTO A WAVE DIRECTED ALONG SAID PATH, AN OPTICAL RESONANT CAVITY CONTAINING SAID MEDIUM, REFLECTOR MEANS FORMING THE BOUNDARIES OF SAID CAVITY AND DEFINING A LASER ENCLOSURE FOR SAID WAVE, AND MEANS FOR ATTENUATING SAID WAVE LOCATED IN SAID ENCLOSURE IN THE PATH OF SAID WAVE FOR DEGRADING THE QUALITY FACTOR OF SAID ENCLOSURE, SAID ATTENUATING MEANS INCLUDING A LAYER OF MATERIAL WHICH IN ONE PHYSICAL STATE IS ONLY PARTIALLY TRANSPARENT TO, AND IS CAPABLE OF SUBSTANTIAL ATTENUATION OF AND EXHIBITS LOW REFLECTIVITY TO LIGHT ENERGY IN A PRESCRIBED OPTICAL FREQUENCY BAND CONTAINING THE FREQUENCY OF SAID WAVE, SAID MATERIAL BEING CAPABLE OF BEING SO ACTED UPON BY SAID ENERGY TRANSVERSING THE SAME AT AN INTENSITY LEVEL ABOVE A PRESCRIBED THRESHOLD VALUE AS TO DESTROY SAID MATERIAL IN SAID PATH IN A TIME INTERVAL WHICH IS SHORT COMPARED WITH THE LIFETIME OF STIMULATED RADIATION IN SAID MEDIUM THEREBY SUBSTANTIALLY TO REMOVE SAID MATERIAL FROM SAID PATH, SAID LAYER PRESENTING ITS SMALLEST DIMENSION IN SAID PATH.