ORBITAL ANGULAR MOMENTUM CAN BE USED TO IMPLEMENT HIGH CAPACITY DATA TRANSMISSION SYSTEMS THAT CAN BE APPLIED FOR CLASSICAL AND QUANTUM COMMUNICATIONS. HERE WE EXPERIMENTALLY STUDY THE GENERATION AND TRANSMISSION PROPERTIES OF THE SO-CALLED PERFECT VORTEX BEAMS AND THE LAGUERRE-GAUSSIAN BEAMS IN RING-CORE OPTICAL FIBERS. OUR RESULTS SHOW THAT WHEN USING A SINGLE PREPARATION STAGE, THE PERFECT VORTEX BEAMS PRESENT LESS RING-RADIUS VARIATION THAT ALLOWS COUPLING OF HIGHER OPTICAL POWER INTO A RING CORE FIBER. THESE RESULTS LEAD TO LOWER POWER REQUIREMENTS TO ESTABLISH FIBER-BASED COMMUNICATIONS LINKS USING ORBITAL ANGULAR MOMENTUM AND SET THE STAGE FOR FUTURE IMPLEMENTATIONS OF HIGH-DIMENSIONAL QUANTUM COMMUNICATION OVER SPACE DIVISION MULTIPLEXING FIBERS.