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Home-made twin-hole optical fibers were thermally poled and etched, a three layer nonlinear region was demonstrated. The two dimensional three charge dynamics model was applied to show the migration and distribution of charge carriers and revealed that the three nonlinear layer region is consistent with the distribution of the charge carriers. The simulation results also showed an inconsistent of...
A simple and high-degree accuracy sensor for solution concentration and temperature based on fused tapering optical fiber coupler is fabricated. The change of refractive index in the evanescent field on the fused region of an optical fiber coupler shifts the output coupling visibility. Therefore the coupling visibility is changed with variation of solution concentration (refractive index) and temperature...
We proposed a composite silica-polymer waveguide design for terahertz wave difference frequency generation from infrared pump sources. The composite waveguide comprises a central poled optical fiber and outer low loss polymer cladding. The simulation shows that, due to long interaction length by way of well-confined collinear propagation of optical pumps and THz wave without diffraction, the waveguide...
One kind of novel fiber-based Terahertz source - opt-THz fiber is proposed, it is based on the second order nonlinearity in the poled optical fiber, where optical fiber is used to transmit optical pump power and distributedly generate Terahertz fields while outside Terahertz fiber is used to transmit Terahertz wave. Simulations have been done and optimized designs are given.
A polarization maintaining air-core polymer fiber for terahertz guiding is proposed. The bandgap repels modal power from the absorbent background polymers, resulting in significant suppression of modal absorption loss.
A novel air-core bandgap polymer fiber for terahertz (THz) wave guiding is investigated. The periodic arrangement of square holes with round corners in cladding offers bandgap effect for mode guiding, such THz fiber shows much wider propagation bandwidth.
An analytical method for band structure calculations of liquid crystal photonic crystal fibers is presented. The influence of the anisotropy on the bandgap properties is discussed base on the method.
A theoretical investigation of birefringence in hybrid photonic crystal fibers is presented. The influences of the ellipticities of the cladding rods and air holes are studied. A high birefringence design is proposed.
The polarization dependent bandgap splitting for nematic liquid crystal photonic bandgap fibers (LCPBGFs) is investigated. We proposed two orthogonal polarization dependent bandgap for guiding linear-polarized fiber modes of LCPBGFs.
We report the fabrication of a new designed all- solid bandgap fiber. The low loss transmission (as low as 2 dB/km at 1310 nm) has been realized with a bandwidth of over 700 nm.
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