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The vegetation succession and soil enzyme activities restoration with different growing years was analyzed by applying the spatio-temporal substitution method. The result showed that H. Rhamnoides and A. Desertoru are predominant species of the shrub layer. With the restore years prolonging, the species diversity index (H′, 1/D), saccharase, urease, phosphatase and catalase activities were increased,...
Organic/Polymer rib optical waveguide is an important component in polymeric integrated optoelectronic devices as electro-optic modulators. By employing effective index method to calculate the transverse refractive index distribution and effective index of polymer rib waveguide, the optical field distribution in each region is expressed as piecewise functions approximately. Based on the scalar wave...
An asymmetric path ridge waveguide for an organic polymer Mach-Zehnder modulator was designed to make the initial phase difference between the two arms be π/2. The mode characteristic is analyzed and the ridge waveguide is designed with effective index method (EIM). Optical field distribution has been simulated by Beam Propagation Method (BPM). Aiming at a smaller conductor loss and better impedance...
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