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公开(公告)号:US06785443B2
公开(公告)日:2004-08-31
申请号:US10062577
申请日:2002-01-30
申请人: Alexis Mendez , Mario Pacheco , Steve Montesanto , Gershon Perelman , William Wang , Jason Zweiback
发明人: Alexis Mendez , Mario Pacheco , Steve Montesanto , Gershon Perelman , William Wang , Jason Zweiback
IPC分类号: G02B634
CPC分类号: G02B6/022
摘要: The present invention is directed to a system and method for tuning an optical fiber Bragg grating by using a circular mechanism which uniformly stretches the fiber along its length while at the same time preserving the minimal size for stretching.
摘要翻译: 本发明涉及一种用于通过使用圆周机制来调谐光纤布拉格光栅的系统和方法,所述圆形机构沿着其长度均匀地拉伸光纤,同时保持最小拉伸尺寸。
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公开(公告)号:US06498891B1
公开(公告)日:2002-12-24
申请号:US09924784
申请日:2001-08-08
申请人: Steve Montesanto , Gershon Perelman , William Wang
发明人: Steve Montesanto , Gershon Perelman , William Wang
IPC分类号: G02B600
CPC分类号: G02B6/0218 , G02B6/02209
摘要: Temperature compensated fiber stretching is accomplished by amplifying with a unique flexure the relative displacement between a rigid frame and a longitudinal spacing element. For passive compensation, relative displacement results from differential thermal expansion between the frame and the longitudinal spacer. For active thermal compensation and/or for wavelength tuning of an embedded fiber Bragg grating, relative displacement results from combining differential thermal expansion with active feedback length control of the longitudinal spacer. The feedback control can stabilize using length feedback from a displacement sensor or actively control length using temperature feedback, including logic elements, for example algorithms or look up tables. In an optical system, combined passive compensation and active control with flexure amplification provide superior thermal wavelength stability and tuning range. In some embodiments, the rigid frame and the flexure are of the same material and can be formed as a single monolithic piece.
摘要翻译: 温度补偿光纤拉伸通过用独特的弯曲放大来实现刚体框架和纵向间隔元件之间的相对位移。 对于被动补偿,相对位移取决于框架和纵向间隔件之间的差热膨胀。 对于嵌入式光纤布拉格光栅的有源热补偿和/或波长调谐,通过将差分热膨胀与纵向间隔物的主动反馈长度控制相结合,产生相对位移。 反馈控制可以使用来自位移传感器的长度反馈或使用包括逻辑元件(例如算法或查找表)的温度反馈来主动控制长度来稳定。 在光学系统中,组合无源补偿和具有挠曲放大的主动控制提供卓越的热波长稳定性和调谐范围。 在一些实施例中,刚性框架和挠曲件具有相同的材料并且可以形成为单个整体件。
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公开(公告)号:US5970168A
公开(公告)日:1999-10-19
申请号:US906021
申请日:1997-08-05
CPC分类号: G01N21/95623 , H01L22/12 , H01L2924/0002
摘要: The present invention resides in a Fourier filter to detect defects on semiconductor wafers. The present invention relates to a Fourier filter to detect defects on semiconductor wafers which is less susceptible to having the filter output affected by vibrations and which avoids the physical contact from conventional damping.
摘要翻译: 本发明在于用于检测半导体晶片上的缺陷的傅立叶滤波器。 本发明涉及一种用于检测半导体晶片上的缺陷的傅立叶滤波器,其较不易受到振动影响的滤波器输出,并且避免了常规阻尼的物理接触。
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