发明授权
- 专利标题: Methods and apparatus for generating polarization mode dispersion
- 专利标题(中): 用于产生偏振模色散的方法和装置
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申请号: US10061897申请日: 2002-02-01
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公开(公告)号: US06847484B2公开(公告)日: 2005-01-25
- 发明人: Jay N. Damask , Shih-Cheng Wang
- 申请人: Jay N. Damask , Shih-Cheng Wang
- 代理商 Brett Alten
- 主分类号: G02F1/01
- IPC分类号: G02F1/01 ; G02F1/03 ; H04B10/18 ; G02B27/28
摘要:
Methods and apparatus for coherent polarization mode dispersion generation are provided. A generator can include at least four birefringent stages. The birefringent stages are in optical series, and each includes a differential group delay (“DGD”) element. The intermediate stages' DGD elements are harmonic. Also, these intermediate stages each include a phase-shifting element. The generator can also include a polarization mode-mixing apparatus and a variable phase-shifting apparatus. The mode-mixing apparatus is capable of inducing polarization mode-mixing between at least one pair of adjacent stages to generate DGD and second order PMD independently at at least one optical frequency. The variable phase-shifting apparatus can include a phase-shifting controller coupled to each of said phase-shifting elements. A graphical user interface for PMD emulation, a PMD compensator for reducing PMD impairment, and calibration methods are also provided.