UNDERWATER COMMUNICATIONS CONCEPTS ANALYSIS FOR BLUE LASER SYSTEMS

IT IS PROPOSED TO CARRY OUT AN ANALYSIS OF UNDERWATER COMMUNICATION CONCEPTS BASED ON BLUE LASER TECHNOLOGY. THE LASER TRANSMITTER WILL BE A PB-VAPOR RAMAN-SHIFTED XECL LASER WITH AN OUTPUT OF 459 NM CORRESPONDING TO THE CS ATOMIC RESONANCE RECEIVER. CONCEPTS TO BE ANALYZED WILL INCLUDE FIBER OPTIC BUNDLES FROM SURFACE CRAFT AND LASER TRANSMITTERS MOUNTED IN REMOTELY-PILOTED SUBMERSIBLE VEHICLES. FACTORS TO BE CONSIDERED INCLUDE SIZE, WEIGHT AND POWER CONSTRAINTS, SINGLE-TO-NOISE ADVANTAGE OVER OTHER OPTICAL COMMUNICATION CONCEPTS (ELG. SLC AND TALC), OPTICAL FIBER PROPERTIES FOR BLUE LIGHT, FIBER OPTICAL DAMAGE THRESHOLD, ETC. AN OPTIMUM CONCEPT WILL BE RECOMMENDED FOR LABORATORY DEMONSTRATION IN PHASE II WITH THE OBJECTIVES OF ACHIEVING IMPROVED RANGE, DATA RATE, SECURITY, RELIABILITY, MAINTAINABILITY, ETC.