Youngjin Ying's scientific contributions

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    • The computed peak temperature (89 o C) for constant-room-temperature absorption coefficient is negligible for any possible lithium thermal diffusion, whereas, for temperature dependent absorption coefficient the computed peak temperature of the crystal reaches the melting point (1257 o C) which eventually supports the lithium diffusion model of UV-written waveguides at 305 nm wavelength. As the peak temperature at the surface of LiNbO 3 reaches the melting point, there will be surface damage which is evident from the microscopic observation of the optical waveguides written at 305 nm laser wavelength [1]. A decrease in electro optic coefficient (r 33 ) has also been obtained for all UV-written waveguides [5], which is the result of heated portion of the waveguide above Curie temperature (1145 o C).
    File · Data · Jan 2015