Er³⁺‐Tm³⁺ Co‐Doped Hybridized Gadolinium Aluminosilicate Glass Fiber for Broadband Optical Amplification

Advanced Materials Technologies, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Abstract Optical fiber communication has greatly promoted the development of information age, while emergence 5G networks, cloud computing, and artificial intelligence have put forward high challenges to capacity current optical systems. At present, increasing bandwidth erbium‐doped amplifiers (EDFA) is most effective way increase capacity. In this paper, a hybridization strategy proposed for simultaneous achieving strong flat response demonstrate success in construction Er 3+ ‐Tm co‐doped gadolinium aluminosilicate glass L‐band amplification. Gd ions are introduced enhance radiative transition by improving dispersibility . Tm co‐introduced facilitate energy transfer between emission L‐band. The hybridized active which can be effectively fused with quartz fabricated melt‐in‐tube (MIT) approach. A amplifier construed it enables achieve on‐off gain (<±0.76 dB) across spectrum. These results indicate that promising material approach provides new novel device.

Language: Английский

Ultralow‐Power Highly‐Selective Near‐Infrared (≈850 nm) Carbon Nanotube Flexible Optoelectronic Synaptic Transistors for Real‐Time Trajectory Tracking

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Abstract Optoelectronic synaptic devices are promising candidate components for brain‐like efficient neuromorphic computing systems. The development of highly‐selective near‐infrared (NIR) optoelectronic is important realizing more optical computing, night monitoring, and robot visual perception. In this work, ultralow‐power (56 aJ per light pulse), NIR (≈850 nm) transistor based on carbon nanotube thin film transistors developed by modification the organic photosensitive material in device channels. showed high sensitivity selectivity to 850 nm pulse light. It noted that response currents after stimulation a single can be nearly six times higher than those stimulated UV light, which attributed IHIC has low bandgap, strong absorption, ideal energy band alignment with nanotubes. Under pulsed stimulation, range complex functions exhibited, including excitatory postsynaptic currents, paired‐pulse facilitation, transition from short‐term plasticity long‐term plasticity, spike‐timing‐dependent image perception memory functions. Significantly, real‐time trajectory tracking car drone under nighttime conditions successfully simulated using array.

Language: Английский

Enhanced tunable ultra-broadband multi-band NIR optical response in Bi-doped photonic glass and fibers by cation hybridization engineering

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 29, 2025

Language: Английский