This work presents a novel delta-star architecture for large-scale multipoint fiber sensor networks with enhanced reconfigurable functionality. Unlike conventional star networks, the proposed network is divided into several delta regions, each containing only one feeder fiber. This delta-star structure significantly reduces the complexity and implementation cost of conventional star networks. A concatenated dual-ring structure with the self-healing function is designed to overcome the star's weakness in reliability. Numerous sensor ring subnets (SRSNs) are utilized to serve a large number of fiber Bragg grating sensors. Delta regions are partitioned upon the criterion of inter-region traffic uniformization; this simplifies the interrogation process and time slot assignment. The reconfigurable function for this multipoint sensor network, which is based on the optical switching technique, is utilized to ensure service continuity when fibers fail. The protection mechanism is illustrated with several multiple link failure cases. Finally, an experimental network is implemented to demonstrate the feasibility and survivability of the proposed sensor network.Index Terms-Delta-star network, fiber Bragg grating (FBG), fiber ring laser, fiber sensor network, network partitioning, reconfigurable function.

Development of manufacture trend for TFTs technologies has focused on improving electrical properties of films with the cost reduction to achieve commercialization. To achieve this goal, high-performance sub-50 nm TFTs-based MOSFETs with ON-current (Ion)/subthreshold swing (S.S.) of 181 µA/µm/107 mV/dec and 188 µA/µm/98 mV/dec for NMOSFETs and PMOSFETs in a monolithic 3D circuit were demonstrated by a low power with low thermal budget process. In addition, a stackable static random access memory (SRAM) integrated with TFTs-based MOSFET with static noise margins (SNM) equals to 390 mV at VDD = 1.0 V was demonstrated. Overall processes include a low thermal budget via ultra-flat and ultra-thin poly-Si channels by solid state laser crystallization process, chemical-mechanical polishing (CMP) planarization, plasma-enhanced atomic layer deposition (ALD) gate stacking layers and infrared laser activation with a low thermal budget. Detailed material and electrical properties were investigated. The advanced 3D architecture with closely spaced inter-layer dielectrics (ILD) enables high-performance stackable MOSFETs and SRAM for power-saving IoT/mobile products at a low cost or flexible substrate.

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Abslracl-Bidirectionr iptical fiber transmission systems using Raman amplification are discussed. The analytical expressions of the signals amplified by both forward and backward Raman scattering are presented. We have found that there exists an optimal pump power for the maximum unrepeatered transmission length in a bidirectional system, and the maximum length is about 450 km, which is about the same as that of the Unidirectional system.

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This work investigates the high-accuracy phase discriminator in 1-bit software-defined receiver (SDR) for three signal-to-noise ratio (SNR) ranges: low SNR, high SNR and moderate SNR.

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Flexible optoelectronics have garnered considerable interest for applications such as optical communication, motion capture, biosignal detection, and night vision. Transitionmetal dichalcogenides are widely used as flexible photodetectors owing to their outstanding electrical and optical properties and high flexibility. Herein, a two-dimensional (2D) Sb 2 Se 3 filmbased one transistor−one resistor (1T1R) flexible photodetector with high photosensing current and detection ranges from visible to near-infrared was developed. The flexible 1T1R was fabricated using an efficient field-effect transistor platform with the 2D Sb 2 Se 3 film directly deposited on the sensing region using a lowtemperature plasma-assisted chemical vapor reaction. The photodetector could achieve a maximum I photo /I dark of 15,000 under white light with a power density of 26 mW/cm 2 , in which the photodetector showed quick rising and falling response times of 0.16 and 0.28 s, respectively. The 2D Sb 2 Se 3 film exhibits broadband absorption in the visible and IR regions, yielding an excellent photoresponse under laser illumination with different wavelengths. To investigate the flexibility and stability of the 1T1R photodetector, the photoresponses were measured under different bending cycles and curvatures, which maintained its functions and exhibited high stability under convex and concave bending at a curvature radius of 20 mm.