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一种掺铒光波导放大器的频谱数值分析方法
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作者 禹忠 韦玮 +1 位作者 陈烽 侯洵 《西安交通大学学报》 EI CAS CSCD 北大核心 2004年第10期1068-1071,共4页
提出了一种基于Douglas离散格式的有限差光束传播法的数值计算方法.采用该方法对实验中所获得的吸收光谱和激发光谱进行Lorentzian叠加拟合,并结合多能级速率方程计算出掺铒光波导放大器(EDWA)中光的场传输强度分布,从而得到掺铒光波导... 提出了一种基于Douglas离散格式的有限差光束传播法的数值计算方法.采用该方法对实验中所获得的吸收光谱和激发光谱进行Lorentzian叠加拟合,并结合多能级速率方程计算出掺铒光波导放大器(EDWA)中光的场传输强度分布,从而得到掺铒光波导放大器的增益和吸收频谱特性.数值分析结果表明,选用泵浦光波长为980nm的泵浦光源比1480nm的可以获得更大的泵浦效率,同时合理增加EDWA的泵浦长度和掺杂离子数密度可以获得更大的信号增益.由于考虑了协同上转换和交叉弛豫效应,该算法能够对高掺杂的EDWA进行较宽频谱的分析. 展开更多
关键词 掺铒光波导放大器 有限差光束传播法 频谱分析
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Optimization design of optical waveguide in mach-zehnder electro-optical polymer modulator 被引量:1
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作者 高原 张晓霞 廖进昆 《Optoelectronics Letters》 EI 2011年第1期1-4,共4页
In order to reduce transmission loss of the optical waveguide in Mach-Zehnder (M-Z) electro-optical (EO) polymer modulator,the basic iterative formula of semi-vector finite-difference beam propagation method (FD-BPM) ... In order to reduce transmission loss of the optical waveguide in Mach-Zehnder (M-Z) electro-optical (EO) polymer modulator,the basic iterative formula of semi-vector finite-difference beam propagation method (FD-BPM) is obtained from the scalar wave equation. The transition waveguide is combined with S-type bend branch waveguide for the M-Z EO modulator in the branch waveguide. The effects of structure parameters such as ridge width,length of the branch waveguide and interferometer spacing on the transmission loss are systematically studied by using the semi-vector FD-BPM method. The structure is optimized as an S-sine bend branch waveguide,with rib width w=7μm,length of branch waveguide L=1200μm and interferometer spacing G=22 μm. The results show that the optimized structure can reduce transmission loss to 0.083 dB,which have a certain reference value to the design of optical waveguide in M-Z polymer modulator. 展开更多
关键词 Beam propagation method Dense wavelength division multiplexing Finite difference method INTERFEROMETERS Light propagation Light transmission Optical waveguides Optimization Polymers Wave transmission Waveguides
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