LASER TRANSMITTERS OPERATING AT A PULSE REPETITION RATE OF 20 HZ TO 50 HZ AND WITH PULSE ENERGY FROM 30 - 50 MJ HAVE BEEN CONSIDERED TO BE AN ENABLING TECHNOLOGY FOR CO2 MEASUREMENT AND OPTICAL COMMUNICATIONS. POLARONYX PROPOSES A NOVEL APPROACH TARGETING TO MAKE RELIABLE HIGH ENERGY ULTRA LARGE CORE FIBER AMPLIFIER AT 1.57 MICRON AND EMPLOYING OUR PROPRIETARY TECHNOLOGIES IN SPECIALTY FIBERS, SPECTRAL SHAPING AND PULSE SHAPING TECHNIQUES. AT THE END OF PHASE 1, AND SIMULATION STUDY WILL BE CARRIED OUT AND FEASIBILITY EXPERIMENT WILL BE DEMONSTRATED IN LAYING OUT THE PATHWAY TOWARDS OVER 30 MJ HIGH ENERGY. A PROTOTYPE WILL BE DEMONSTRATED AT THE END OF PHASE II.