发明申请
US20120092971A1 Cross-track alignment waveguides and alignment scheme using alignment waveguides
有权
使用对准波导的交叉轨道对准波导和对准方案
- 专利标题： Cross-track alignment waveguides and alignment scheme using alignment waveguides
- 专利标题（中）： 使用对准波导的交叉轨道对准波导和对准方案
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申请号： US12925283申请日： 2010-10-18
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公开(公告)号： US20120092971A1公开(公告)日： 2012-04-19
- 发明人: Erhard Schreck , Xuhui Jin , Tobias Maletzky , Joe Smyth , Dayu Zhou , Yuchen Zhou , Kenichi Takano
- 申请人： Erhard Schreck , Xuhui Jin , Tobias Maletzky , Joe Smyth , Dayu Zhou , Yuchen Zhou , Kenichi Takano
- 专利权人： Headway Technologies, Inc.
- 当前专利权人： Headway Technologies, Inc.
- 主分类号： G11B11/00
- IPC分类号： G11B11/00
摘要：
A waveguide structure for aligning a light source to a center waveguide (CWG) in a TAMR head is disclosed and includes two alignment waveguides (AWVG) symmetrically formed about a plane that bisects the CWG lengthwise dimension. Each AWVG has a light coupling section formed parallel to a side of the CWG and captures 0.5% to 10% of the light in the CWG. Each AWVG has an outlet that directs light to a photo detector or camera so that light intensity measurements lAWVG1 and lAWVG2 for first and second AWVG, respectively, can be taken at various positions of the light source. Optimum alignment occurs when (lAWVG1+lAWVG2) reaches a maximum value and |lAWVG1−lAWVG2| has a minimum value. AWVG outlets may be at the ABS, or at the side or back end of a slider. Measurement sensitivity is increased by decreasing the width of the AWVG.
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