Photonics and LASER: Foundations, Advances, and Emerging Frontiers
Abstract Photonics, the science of light generation, manipulation, and detection, has become a transformative discipline in modern science and engineering. Central to this field is the LASER (Light Amplification by Stimulated Emission of Radiation), which has revolutionized communication, medicine, manufacturing, and defense. This article provides a comprehensive review of photonics and LASER technologies, tracing their theoretical foundations, material platforms, and diverse applications. It integrates mathematical models, experimental advances, and future directions, situating photonics and LASER as pivotal drivers of 21st-century innovation. Keywords: Photonics, LASER, quantum optics, fiber optics, nonlinear optics, biophotonics, quantum communication --- 1. Introduction Photonics bridges physics, engineering, and materials science, focusing on light as both particle and wave. Since the invention of the LASER in 1960, photonics has expanded into telecommunications, energy harvesting...
