ABSTRACT - Addressing the fundamental concern of security in classical cryptosystems, quantum communication (QC) offers a promising solution for establishing secure networks grounded in the principles of quantum mechanics. Quantum Key Distribution (QKD) and Quantum Secure Direct Communication (QSDC), are two forefront approaches in QC, while the former focuses on key negotiation, and the latter enables the direct transmission of secret messages without the need for a private key setup. Our work spans the entire development spectrum of QC, from initial proof-of-principle lab demonstrations to in-field practical implementations. We have demonstrated the novel continuous variable-QSDC protocol using coherent and squeezed states over optical fibers, and are advancing discrete variable-QKD protocols across free-space channels, notably for secure marine communication between shore and ships, and across optical fiber for the establishment of regional quantum networks. This presentation will delve into the specifics of these projects, highlighting our journey from theoretical constructs to practical real-world applications, and discussing other related endeavors in the implementation of quantum networks.