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1. 发明申请

WO02075391A3 OPTICAL GRATING-BASED FILTER 审中-公开
标题翻译：基于光刻胶的滤光片
公开(公告)号：WO02075391A3
公开(公告)日：2003-02-27
申请号：PCT/US0209195
申请日：2002-03-15
申请人： CIDRA CORP
发明人： BAILEY TIMOTHY J , PUTNAM MARTIN A , DAWSON JAY W , PINTO JOSEPH , SIRKIS JAMES S , SZCZEPANEK PAUL S
IPC分类号： G02B6/34 , G02B6/16
CPC分类号： G02B6/2932 , G02B6/02176 , G02B6/022 , G02B6/29322 , G02B6/29323 , G02B6/2938 , G02B6/29385 , G02B6/29398 , G02B6/4215
摘要： An optical filter for filtering a spectral profile of an optical signal for providing an output signal having a desire gain profile, such as a flatten gain profile. The filter comprises an optical waveguide that includes a core (42) disposed within a cladding (44) having an outer dimension greater than 0.3 mm. A Bragg grating (181-185) is imparted or written in the core of the waveguide that attenuates the received optical input signal (16) in accordance with a defined reflection or transmission filter profile. The Bragg grating may be a slanted grating. The filter profile is complementary to the spectral gain profile of the input signal to provide an output signal (20) having a substantially flat spectral profile of a desired wavelength band. The cladding of the waveguide may have a mechanically advantageous outer geometry (e.g., a "dogbone" shape) for allowing an axial compressive force to tune the Bragg grating. The waveguide may be packaged within an athermal device, which tunes the grating to compensate for temperature dependent changes. Further, the waveguide may be packaged in a tuning device to selective tune the gratings to shift the center wavelength of the spectral profile of the filter, or to change the shape of the filter profile.
摘要翻译：一种滤光器，用于对光信号的光谱分布进行滤波，以提供具有期望增益分布的输出信号，例如平坦增益分布。滤波器包括光波导，其包括设置在外部尺寸大于0.3mm的包层（44）内的芯（42）。布拉格光栅（181-185）被赋予或写入波导的核心，其根据限定的反射或透射滤波器轮廓衰减所接收的光输入信号（16）。布拉格光栅可以是倾斜光栅。滤波器轮廓与输入信号的频谱增益分布互补，以提供具有所需波长带的基本上平坦的谱分布的输出信号（20）。波导的包层可以具有用于允许轴向压缩力调谐布拉格光栅的机械有利的外部几何形状（例如，“狗骨”形状）。波导可以封装在无热器件中，其调谐光栅以补偿温度依赖的变化。此外，波导可以封装在调谐装置中以选择性调谐光栅以移动滤光器的光谱分布的中心波长，或者改变滤光片的形状。

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