1 School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; 2 State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences(CAS), Xi'an 710119, China
Abstract A Nd:CLNGG waveguide structure operated at wavelengths of both 632.8 nm and 1539 nm was demonstrated for the first time to our knowledge, which was produced by the 480-keV H+ ion implantation with a dose of 1.0×1017 protons/cm2. Its propagating modes at 632.8 nm and 1539 nm were measured by the well-known prism coupling technique. The refractive index profile at either 632.8-nm wavelength or 1539-nm wavelength was optical barrier type in the proton-implanted Nd:CLNGG crystal optical waveguide, which was calculated by using the reflectivity calculation method. The near-field light intensity distributions were also simulated by the finite-difference beam propagation method in the visible and near-infrared bands.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11405041 and 61177084), the Nanjing University of Posts and Telecommunications Scientific Foundation (NUPTSF), China (Grant No. NY214159), and the RCOCET, China (Grant No. ZSF0401).{These authors contributed equally to this work.
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