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首页> 外文会议>Conference on physics and simulation of optoelectronic devices XXIII >Modeling of optical amplifier waveguide based on silicon nanostructures and rare earth ions doped silica matrix gain media by a finite-difference time-domain method: comparison of achievable gain with Er~(3+) or Nd~(3+) ions dopants
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Modeling of optical amplifier waveguide based on silicon nanostructures and rare earth ions doped silica matrix gain media by a finite-difference time-domain method: comparison of achievable gain with Er~(3+) or Nd~(3+) ions dopants

机译：基于硅纳米结构和稀土离子的光放大器波导的建模通过有限差差时域法的掺杂二氧化硅基质增益介质：通过ER〜（3+）或Nd〜（3）离子掺杂剂的可实现增益比较

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A comparative study of the gain achievement is performed in a waveguide optical amplifier whose active layer is constituted by a silica matrix containing silicon nanograins acting as sensitizer of either neodymium ions (Nd~(3+)) or erbium ions (Er~(3+)). Due to the large difference between population levels characteristic times (ms) and finite-difference time step (10~(-17)s), the conventional auxiliary differential equation and finite-difference time-domain (ADE-FDTD) method is not appropriate to treat such systems. Consequently, a new two loops algorithm based on ADE-FDTD method is presented in order to model this waveguide optical amplifier. We investigate the steady states regime of both rare earth ions and silicon nanograins levels populations as well as the electromagnetic field for different pumping powers ranging from 1 to 10~4 mW.mm~(-2). Furthermore, the three dimensional distribution of achievable gain per unit length has been estimated in this pumping range. The Nd~(3+) doped waveguide shows a higher gross gain per unit length at 1064 nm (up to 30 dB.cm~(-1)) than the one with Er~(3+) doped active layer at 1532 nm (up to 2 dB.cm~(-1)). Considering the experimental background losses found on those waveguides we demonstrate that a significant positive net gain can only be achieved with the Nd~(3+) doped waveguide. The developed algorithm is stable and applicable to optical gain materials with emitters having a wide range of characteristic lifetimes.
机译：对增益成果的比较研究在波导光学放大器中进行，其有源层由含有硅纳米氧化硅纳米的二氧化硅基质构成，其作用为钕离子（Nd〜（3+））或铒离子（ER〜（3+）的敏化剂）））。由于人口水平特征时间（MS）和有限差分时间步骤（10〜（-17）），传统的辅助微分方程和有限差分时间域（ADE-FDTD）方法是不合适的治疗这些系统。因此，提出了一种基于ADE-FDTD方法的新的两个回路算法，以便为该波导光放大器进行建模。我们调查稀土离子和硅纳米人的稳定状态，以及不同泵送功率的电磁场，范围为1至10〜4 mw.mm〜（-2）。此外，在该泵送范围内估计了每单位长度可实现的增益的三维分布。 ND〜（3+）掺杂波导显示每单位长度的较高的总增益，在1064nm（高达30 dB.cm〜（-1）），而不是1532 nm（3）掺杂的有源层（高达2 dB.cm〜（-1））。考虑到那些波导的实验背景损失，我们证明只能通过ND〜（3+）掺杂波导来实现显着的正净增益。开发算法稳定，适用于光学增益材料，具有具有各种特征寿命的发射器。

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