“…From the theoretical point of view we may refer to a number of published papers in this subject, including the earliest papers published by Peters and Allen, [1,2] Casperson and Yariv, [3] Casperson, [4] and Pert. [5] In recent years, on the other hand, with the emerging need of laser materials for their vast applications in laser technology, conjugated polymer films, BuEH-PPV, [6] MEH-PPV, [7][8][9] cyano substituted oligo (CN-DPDSB) single crystal, [10] InAs quantum dots, [11] etc., were studied extensively, where due to their importance, the subject has also been reviewed. [12,13] The most important interest in these studies is to use ASE as a source of coherent radiation.…”