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    • 46. 发明授权
    • Wavelength selective optical filter
    • 波长选择性滤光片
    • US06665459B2
    • 2003-12-16
    • US10150695
    • 2002-05-17
    • Rosemary CushWilliam J StewartRuth Hibberson
    • Rosemary CushWilliam J StewartRuth Hibberson
    • G02B626
    • G02B6/29358G02B6/12007G02B6/29362G02B6/29383G02B6/29395G02B26/001G02B26/02H04J14/0206H04J14/021H04J14/0213
    • The present invention provides a wavelength selective optical filter device (240) for receiving input radiation and outputting corresponding filtered output radiation, characterized in that the filter device (240) includes a plurality of at least partially mutually coupled Fabry-Perot optical resonators (330, 340, 360; 360, 400, 430) for filtering the input radiation to generate the output radiation, the filter device (240) being tunable from a first radiation wavelength to a second radiation wavelength by mutually detuning the resonators in a period where the resonators are being retuned from the first wavelength (&lgr;1) to the second wavelength (&lgr;2) so that the filter device (240) is substantially in a non-responsive state during the period. The resonators incorporate freely suspended mirrors (360, 430) which are electrostatically actuated to affect tuning of the resonators (330, 340, 360; 360, 400, 430). The filter device (240) is thereby capable of tuning between different wavelengths without tuning through wavelengths therebetween. The filter device (240) can be included into an add-drop filter (10) for providing channel add and drop functions when the filter (10) is incorporated in a multichannel WDM communication system (100).
    • 本发明提供了一种用于接收输入辐射并输出相应的滤波输出辐射的波长选择性滤光器装置(240),其特征在于,滤光器装置(240)包括多个至少部分相互耦合的法布里 - 珀罗光谐振器(330, 340,360; 360,400,430),用于对输入辐射进行滤波以产生输出辐射,所述滤波器装置(240)可在第一辐射波长可调谐到第二辐射波长,通过在谐振器 正在从第一波长(λ1)重新调整到第二波长(λ2),使得过滤器装置(240)在该周期期间基本处于非响应状态。 谐振器包括自由悬挂的反射镜(360,430),其被静电致动以影响谐振器(330,340,360; 360,400,430)的调谐。 因此,滤波器装置(240)能够在不同波长之间进行调谐,而不通过它们之间的波长进行调谐。 当滤波器(10)并入多通道WDM通信系统(100)中时,滤波器装置(240)可被包括在插入式滤波器(10)中,用于提供信道加和减功能。