发明授权
- 专利标题: Optical devices employing an optical thresholder
- 专利标题(中): 采用光阈值的光学器件
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申请号: US09998545申请日: 2001-11-29
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公开(公告)号: US06529674B2公开(公告)日: 2003-03-04
- 发明人: Richard A. Fields , Bruce A. Ferguson , Mark Kintis , Elizabeth T. Kunkee , Lawrence J. Lembo , Stephen R. Perkins , David L. Rollins , Eric L. Upton
- 申请人: Richard A. Fields , Bruce A. Ferguson , Mark Kintis , Elizabeth T. Kunkee , Lawrence J. Lembo , Stephen R. Perkins , David L. Rollins , Eric L. Upton
- 主分类号: G02B600
- IPC分类号: G02B600
摘要:
An optical device for use with an optical input beam comprising an optical thresholding device positioned along an optical path defined by the propagation direction of the optical input beam. If the combined intensity of the optical input beam and a control beam exceeds a threshold level, the optical beam passes through the thresholding device. Preferably, the optical thresholding device is a saturable absorber. When the device is configured as an optical comparator, the intensity of the optical input beam exceeds the threshold level and the thresholding device saturates and turns transparent so that the control beam passes through the thresholding device as an optical indicator beam. When the device is configured as an optical signal attenuator and the intensity of the optical input signal is negligible compared to that of the control beam, the combined intensity of the beams does not saturate the thresholding device.
公开/授权文献
- US20020034371A1 Optical devices employing an optical thresholder 公开/授权日:2002-03-21