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    • 6. 发明申请
    • Method and apparatus for implementing a multi-channel tunable filter
    • 用于实现多通道可调谐滤波器的方法和装置
    • US20050084211A1
    • 2005-04-21
    • US11004319
    • 2004-12-03
    • Demetri PsaltisChristophe MoserGreg SteckmanKarsten BuseIngo NeeJoerg Hukriede
    • Demetri PsaltisChristophe MoserGreg SteckmanKarsten BuseIngo NeeJoerg Hukriede
    • G02B6/34
    • G02B6/2931G02B6/29311G02B6/29316G02B6/29395G03H2260/54
    • The present invention provides a multi-channel turnable filter and methods for making such a filter. In one embodiment, the filter comprises a bank of gratings imprinted into a filter material, such as Lithium Niobate. In another embodiment, the filter comprises a bank of gratings imprinted on a thin-film filter. An optical read-head comprising a pair of lenses is configured to pass light from within an optical fiber carrying multiple wavelengths through an appropriate grating to extract or drop a specific wavelength. To ensure continuous data transmission, the filter is tuned to a wavelength by configuring the read-head to move in a hitless manner. In one embodiment, the gratings are recorded by the interference of two beams. A first plane wave reflects off a first mirror stack and a second plane wave reflects off a second mirror stack In another embodiment, the gratings are recorded by a phase masking method.
    • 本发明提供一种多通道可转换滤波器及其制造方法。 在一个实施例中,滤光器包括印刷到过滤材料中的一组光栅,例如铌酸锂。 在另一个实施例中,滤光器包括压印在薄膜滤光片上的一组光栅。 包括一对透镜的光学读取头被配置为使来自携带多个波长的光纤内的光通过适当的光栅以提取或降低特定波长。 为了确保连续的数据传输,通过配置读取头以无限的方式移动,将滤波器调谐到一个波长。 在一个实施例中,光栅由两个光束的干涉来记录。 第一平面波反射离开第一反射镜叠层,而第二平面波从第二反射镜堆叠反射。在另一个实施例中,通过相位掩蔽方法记录光栅。