• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >High power linearly polarized fiber lasers in a linear cavity.
【24h】

High power linearly polarized fiber lasers in a linear cavity.

机译：线性腔中的高功率线性偏振光纤激光器。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This thesis presents two designs for high power linearly polarized all-fiber linear cavity lasers, continuous wave (CW) and mode-locked. The cavity designs use Polarization Maintaining (PM) fibers for both gain medium and Fiber Bragg Gratings (FBGs). The FBG pairs select lasing wavelength and polarization. The fiber lasers incorporating specialty designed FBGs achieve an extinction ratio larger than 23 dB.;Experimental data and numerical simulations of the self mode-locking fiber laser are presented. Main parameters affecting mode-locked pulses and its envelope are identified. In addition, a new theoretical model based on Nonlinear Schrodinger Equation (NLSE) is developed and implemented on the MATLABRTM platform. The model explains the self mode-locking mechanism and the source of the pulse envelope. In this model, it is proven that self phase modulation (SPM) plays an essential role in pulse formation and shaping. The theoretical model and experimental results are in a very good agreement at different pumping levels.;A method of regulating the mode-locked pulses is presented. This is achieved by applying a pulsed current to pump diode. This method successfully stabilizes the mode-locked pulses underneath a Q-switched pulse envelope. Further scale-up of average power and pulse energy is realized by adding an amplifier stage.;Secondly, a CW dual-wavelength all-fiber laser is presented. The laser consists of two pairs of FBGs and a PM Er/Yb co-doped fiber as a gain medium. The laser emits at both 1 mum and 1.5 mum wavelengths simultaneously with a stable output. This laser provides a compact fiber-based pumping source that is suitable for mid-IR generation.;Firstly, an all-fiber linear cavity design of a high power picoseconds mode-locked laser is introduced. The proposed configuration is based on Non-Linear Polarization (NPR) using PM Yb-doped active fiber and two matching FBGs to form the laser cavity. The combination of nonlinearity, gain and birefringence in cavity made the laser generate mode-locked pulses in picoseconds range and with high average output power. The output mode-locked pulses amplitude is modulated with an envelope whose mechanism is also investigated in this thesis project.
机译：本文提出了连续波（CW）和锁模的高功率线性偏振全光纤线性腔激光器的两种设计。腔体设计将偏振保持（PM）光纤用于增益介质和布拉格光栅（FBG）。 FBG对选择激光波长和偏振。包含专门设计的FBG的光纤激光器的消光比大于23 dB。;给出了自锁模光纤激光器的实验数据和数值模拟。确定影响锁模脉冲及其包络的主要参数。此外，还开发了一种基于非线性薛定inger方程（NLSE）的新理论模型，并在MATLABRTM平台上实施。该模型说明了自锁模机制和脉冲包络的来源。在该模型中，已证明自相位调制（SPM）在脉冲形成和整形中起着至关重要的作用。在不同的抽运水平下，理论模型与实验结果吻合得很好。提出了一种调节锁模脉冲的方法。这是通过向泵浦二极管施加脉冲电流来实现的。该方法成功地将Q开关脉冲包络线下的锁模脉冲稳定下来。通过增加一个放大级进一步实现平均功率和脉冲能量的进一步放大。其次，提出了一种连续波双波长全光纤激光器。该激光器由两对FBG和一根PM Er / Yb共掺杂光纤作为增益介质组成。激光同时发出1微米和1.5微米的波长，并具有稳定的输出。该激光器提供了一种紧凑的基于光纤的泵浦光源，适用于中红外的产生。首先，介绍了高功率皮秒锁模激光器的全光纤线性腔设计。提出的配置基于非线性偏振（NPR），该偏振使用PM Yb掺杂的有源光纤和两个匹配的FBG形成激光腔。腔体中非线性，增益和双折射的结合使激光产生了皮秒范围内的锁模脉冲，并具有较高的平均输出功率。输出锁模脉冲幅度由一个包络调制，该包络的机理也在本项目中进行了研究。

著录项

  • 作者

    Eldamak, Angie Reda Abdelhay Mohamed Ali.;

  • 作者单位

    Ryerson University (Canada).;

  • 授予单位 Ryerson University (Canada).;
  • 学科 Engineering Electronics and Electrical.;Engineering Computer.;Engineering General.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 127 p.
  • 总页数 127
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号