This chapter demonstrates the application, recent trends, and future of microwave photonics by showcasing an example of Photonics-based THz Transceiver design for future 6G networks. A comprehensive overview of emerging trends—like THz transceivers is provided, with a focus on 6G-enabling technologies. Through real-world examples and case study, the chapter emphasizes how photonic technologies are reshaping RF system design and offers a forward-looking perspective on research directions and commercial applications.