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Modelling of graded index waveguide fabricated by ion exchange on Er^(3+) doped glass 被引量:1
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作者 邵公望 金国良 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第3期1096-1104,共9页
A general numerical tool, based on thermal diffusion equation and full-vectorial eigen-mode equation, has been presented for the systematic analysis of graded index channel waveguide fabricated by ion exchange on Er^3... A general numerical tool, based on thermal diffusion equation and full-vectorial eigen-mode equation, has been presented for the systematic analysis of graded index channel waveguide fabricated by ion exchange on Er^3+ doped glass. Finite difference method with full-vectorial formulation (FV-FDM) is applied to solving the full-vectorial modes of graded index channel waveguide for the first time. The coupled difference equations based on magnetic fields in FV-FDM are derived from the Taylor series expansion and accurate formulation of boundary conditions. Hybrid nature of vectorial guided modes for both pump (980 nm) and signal light (1550 nm) are demonstrated by the simulation. Results show that the fabrication parameters of ion exchange, such as channel opening width and time ratio of second step to first step in ion exchange, have large influence on the properties of waveguide. By optimizing the fabrication parameters, maintenance of monomode for signal light and improvement of the gain dynamics can be achieved in Er^3+ doped waveguide amplifier (EDWA) fabricated by ion exchange technique. This theoretical model is significant for the design and fabrication of EDWA with ion exchange technique. Furthermore, a single polarization EDWA, which operates at wavelength from 1528 nm to 1541 nm for HE polarization, is numerically designed. 展开更多
关键词 graded index channel waveguide finite difference method full-vectorial mode ion exchange technique
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LiNbO_(3) channel and ridge waveguides based on helium ion implantation combined with lithography and precise diamond dicing 被引量:2
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作者 Sumei Wang Jinhua Zhao +7 位作者 Jinjun Gu Mingyang Bu Li Fan Shuang Li Xifeng Qin Yicun Yao Yingying Ren Lei Wang 《Chinese Optics Letters》 SCIE EI CAS CSCD 2022年第7期13-17,共5页
Lithium niobate(LiNbO_(3),LN)channel and ridge waveguides have been successfully fabricated by He ion implantation,which has energy of 500 keV and fluence of 1.5×10^(16)ions/cm^(2) and is combined with lithograph... Lithium niobate(LiNbO_(3),LN)channel and ridge waveguides have been successfully fabricated by He ion implantation,which has energy of 500 keV and fluence of 1.5×10^(16)ions/cm^(2) and is combined with lithography and the precise diamond dicing technique.The refractive index profile of the annealed LN planar waveguide was reconstructed.The propagation loss of the channel waveguide with a width of 10μm and that of the ridge waveguides with widths of 25μm and 15μm were investigated by the end-face coupling method.In our work,the factors that affect the waveguide properties of channel and ridge waveguides were revealed. 展开更多
关键词 lithium niobate waveguideS ion implantation ridge waveguide channel waveguide
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