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Concept and experiment setup for spatial mode rotation control. The dashed and solid curves in the graph represent the SHG efficiencies for and , respectively.
Waveguide cross section, measured SH mode image, and conversion efficiencies. (a) Cross-section of the fabricated ridge waveguide. [(b) and (c)] Generated SH mode images for and at 923 nm, respectively. (d) Conversion efficiencies of the and modes as functions of the temperature at the FH wavelength of 923 nm.
Simulation results of the conversion efficiencies, phase difference, and rotation angle according to the temperature. (a) SHG conversion efficiencies. (b) Phase difference between and . (c) Rotation angle caused by the interfered mode pattern.
Continuous rotation of the SH mode distributions according to the temperature change at the FH wavelength of 923 nm.
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