Graphene/Epoxy Composite Based Broadband All-Optical Tunable Fiber Microcavity Filter

Reflective epoxy resin/chitosan/PAA composite-functionalized fiber-optic interferometric probe sensor for sensitive heavy metal ion detection

“…The basic sensing principle of this F-P type fiber probe sensor is that one part if the incident light can be reflected at the end face of the SMF that inserted into the ceramic tube. 27 The other part of incident light can propagate into the F-P cavity, which can be partially reflected at the outer surface of the ER sensing diaphragm and a considerate proportion of reflected light can coupled into the SMF again, thus corresponding to a phase shift with F-P cavity length information. Because the two ends of the F-P cavity can be approximately regarded as two parallel plates, thus the multibeam interference theory can be applied to this sensor.…”

Integrated Fabry–Perot interferometer based on Er/Yb co-doped fiber for all-optical phase modulation

“…Because of its simple fabrication and stability, fiber in-line interferometers are widely applied in the fields of fiber sensors and optical filters [13][14][15] . Similarly, it also provides an excellent platform for all-optical modulation.…”

Short Carbon Nanotube Nano-Film-Based Polymer/SiO2 Hybrid Waveguide Micro-Ring Filter

“…In 2021, our group proposed a dual graphene films-enabled all-optical tunable filter with a wavelength-tunable efficiency of −0.104 nm/mW at 980 nm pump power . In the same year, our group proposed a broadband all-optical tunable filter based on graphene/epoxy resin composite material, whose wavelength tuning range and tuning efficiency were 25.54 nm and −832 pm/mW, respectively. It is worth noting that although the above two filters have high tuning efficiency, their volume and loss are relatively large, and they cannot be made into chip-level filters.…”