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Far-field technique for tunable coupling to high-order guided modes of photonic crystal fibers

机译:用于可调耦合到光子晶体纤维的高阶导向模式的远场技术

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We investigate the potentials of using a far-field technique for tunable coupling to high-order guided modes of photonic crystal fibers. The field distribution matched for coupling to the fiber is generated by the optical Fourier transform of grating-based phase patterns dynamically encoded on a spatial light modulator. Tuning the parameters of phase-only binary diffractive patterns can modulate both amplitude and phase of the coupling field. Experiments demonstrate tunable and spatially controllable coupling to the second-order mode of a commercially available index-guided micro-structured fiber with a triangular lattice air-hole structure.
机译:我们研究了使用远场技术来调节耦合到光子晶体纤维的高阶推导模式的潜力。通过在空间光调制器上动态编码的基于光栅的相位图案的光学傅里叶变换,产生用于耦合到光纤的场分布。调整相位二进制衍射图案的参数可以调制耦合场的两个幅度和相位。实验证明了与三角形格子气孔结构的市售指导微结构光纤的二阶模式的可调谐和空间上可控的耦合。

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