Quantum optics, the study of light and its interactions with matter at the quantum level, has revolutionized modern telecommunications. By leveraging quantum phenomena such as entanglement, superposition, and photon manipulation, quantum optics enables ultra-secure communication, high-speed data transfer, and novel computing paradigms. The integration of quantum technologies into emerging communication infrastructures, particularly 6G networks, is becoming increasingly critical for overcoming the inherent limitations of classical communication and computation. In summary, quantum optics and quantum information have profoundly influenced modern physics and technology, where the field continues to bridge fundamental research and practical applications, promising further innovations in the future. The exponential growth of data traffic necessitates advancements in secure and high-speed communication technologies. Classical telecommunications rely on electromagnetic waves, but quantum optics introduces fundamentally new capabilities by exploiting quantum states of light. This paper explores the fundamental principles of quantum optics, its applications in quantum key distribution (QKD), quantum teleportation, and quantum repeaters, and its impact on next-generation telecommunications. We also discussed challenges and future prospects of the quantum optics in telecommunications. The integration of quantum technologies into emerging communication infrastructures, particularly 6G networks, is becoming increasingly critical for overcoming the inherent limitations of classical communication and computation. In summary, quantum optics and quantum information have profoundly influenced modern physics and technology, where the field continues to bridge fundamental research and practical applications, promising further innovations in the future. The exponential growth of data traffic necessitates advancements in secure and high-speed communication technologies. Classical telecommunications rely on electromagnetic waves, but quantum optics introduces fundamentally new capabilities by exploiting quantum states of light. This paper explores the fundamental principles of quantum optics, its applications in quantum key distribution (QKD), quantum teleportation, and quantum repeaters, and its impact on next -generation telecommunications. We also discussed challenges and future prospects of the quantum optics in telecommunications. INTRODUCTION Quantum optics has evolved from a specialized area within atomic, molecular, and optical physics into a vibrant and interdisciplinary field that bridges multiple branches of physics. The field continues to bridge fundamental research and practical applications, promising furt her innovations in the future. The exponential growth of data traffic necessitates advancements in secure and high- speed communication technologies. Classical telecommunications rely on electromagnetic waves, but quantum optics introduces fundamentally n ew capabilities by exploiting quantum states of light. This paper examines how quantum optics enhances telecommunications through: Quantum Key Distribution (QKD) for unbreakable encryption, Quantum Teleportation for state transfer without physical transmission, and Quantum Repeaters for long -distance entanglement distribution. Quantum optics, a field that explores the interaction between light and matter at the quantum level, has revolutionized the field of telecommunications. By harnessing the principles of quantum mechanics, quantum optics enables the development of advanced technologies that can transform the way we communicate. Quantum optics is based on the principles of quantum mechanics, which The Role of Quantum Optics in Next… Atsuwe et al., NJP 230 NIGERIAN JOURNAL OF PHYSICS NJP VOLUME 35(1) njp.nipngr.org describe the behavior of particles at the atomic and subatomic level. Existing reviews often summarize quantum optical principles and applications without critically addressing the gap between theoretical promise and practical implementation. This paper moves beyond mere summarization to synthesize insights from the literature, focusing on the challenges that hinder real -world deployment and the solutions proposed to overcome them. We argue that the future of quantum telecommunications depends not only on advancing core technologies like QKD and quantum repeaters but also on solving integration, scalability, and noise -related issues. Table 2: Comparison of QKD Protocols (Field, 2025) S/N Protocol Basis Used Security Mechanism 1. BB84 Polarization Heisenberg Uncertainty 2. E91 Entanglement Bell’s Theorem The Role of Quantum Optics in Next… Atsuwe et al., NJP 234 NIGERIAN JOURNAL OF PHYSICS NJP VOLUME 35(1) njp.nipngr.org Quantum Teleportation For many, It has a wide range of applications where by harnessing the principles of quan tum mechanics, quantum optics can enable advanced telecommunications systems that are more secure, efficient, and reliable. As research and development in this field continue to advance, we can expect to see widespread adoption of quantum optics-based systems in telecommunications. Some of the key applications of quantum optics in telecommunications include (Nielsen, & Chuang, 2010): i. Quantum Key Distribution (QKD): One of the most significant applications of quantum optics in telecommunications is Quantum Key Distribution (QKD) (Gisin et al., 2002). From quantum computing to quantum cryptography, quantum optics has enabled the development of many new technologies and applications. As rese arch and development in this field continue to advance, we can expect to see widespread adoption of quantum optics-based systems in a wide range of fields. Quantum optics is transforming telecommunications by enabling ultra -secure, high -speed, and long -distance quantum communication. From QKD and quantum teleportation to quantum repeaters, these technologies are paving the way for a quantum internet.