<p>Future optical access networks will have significant challenges in achieving energy efficiency, flexibility, and reliable communications links. Data-intensive applications such as Augmented/Virtual Reality (AR/VR), holographic communications, autonomous driving, high-precision manufacturing, and ultra-massive machine-type communications will require high throughput, resilient transmission links, high speed, and high energy efficiency. This paper proposes a fault-protected Single Mode Fiber (SMF) / Free Space Optics (FSO) ring-based pay-as-you-grow hybrid Wavelength Division Multiplexed (WDM) and Time Division Multiplexed (TDM) optical network to create a highly reliable architecture for delivering seamless connectivity to the end users. The proposed architecture can provide uninterrupted high-speed WDM Point-to-Point (P2P) downstream and upstream transmission. The proposed ring topology-based architecture can migrate traffic to an alternative route whenever any fault occurs in the main distribution ring. The dynamic resource allocation using the pay-as-you-grow model helps reduce energy requirements. It can give a Q-factor more than 6 for both fault-free situations (normal condition) and scenarios for multiple faults at different locations. In addition, the proposed architecture can reduce energy requirements by up to 80% using a pay-as-you-grow model. The availability of an alternative link during faults in the SMF link is around 76.65% for the considered representative traffic pattern. The architecture can be deployed to handle traffic from Internet of Things (IoT) and smart city applications that require high-speed and reliable internet connectivity.</p>