A 2×2 microfiber knot resonator(MKR)coupler is demonstrated.The hybrid device is obtained by forming a knot within the coupling region of a microfiber coupler with a 50:50 splitting ratio.The microfiber coupler i...A 2×2 microfiber knot resonator(MKR)coupler is demonstrated.The hybrid device is obtained by forming a knot within the coupling region of a microfiber coupler with a 50:50 splitting ratio.The microfiber coupler is successfully fabricated by laterally fusing and tapering two optical fibers using a flame-brushing technique.The coupler has an overlapping length of 40 mm with a uniform waist of around 5μm.With an MKR structure,the coupler produces a resonant response at both output ports.The free spectral range of the output spectrum from both ports is obtained at 0.2 nm at a knot diameter of 260μm.The resonance extinction ratio of the device varies from 2 to 6 dB while the calculated Q factor and finesse are~25646 and 3.3,respectively,at both output ports.展开更多
基金Supported by the MOSTI Brain Gain Program under Grant No 5302031067.
文摘A 2×2 microfiber knot resonator(MKR)coupler is demonstrated.The hybrid device is obtained by forming a knot within the coupling region of a microfiber coupler with a 50:50 splitting ratio.The microfiber coupler is successfully fabricated by laterally fusing and tapering two optical fibers using a flame-brushing technique.The coupler has an overlapping length of 40 mm with a uniform waist of around 5μm.With an MKR structure,the coupler produces a resonant response at both output ports.The free spectral range of the output spectrum from both ports is obtained at 0.2 nm at a knot diameter of 260μm.The resonance extinction ratio of the device varies from 2 to 6 dB while the calculated Q factor and finesse are~25646 and 3.3,respectively,at both output ports.
