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    • 3. 发明授权
    • Method for annealing an optical waveguide having a bragg grating to accelerate ageing
    • 对具有布拉格光栅的光波导进行退火以加速老化的方法
    • US06601411B2
    • 2003-08-05
    • US09751672
    • 2001-03-26
    • Trevor W. MacDougallMartin A. PutnamMark R. Fernald
    • Trevor W. MacDougallMartin A. PutnamMark R. Fernald
    • C03B3700
    • C03B25/025C03B37/15
    • The present invention provides a method for annealing an optical waveguide, including an optical fiber or large-diameter waveguide structure, having along some length an induced refractive index difference that decays over time and so causes drift in the wavelength of reflected light when broadband light is inserted into the optical waveguide. The method uses an assumed decay formula for the induced refractive index difference indicating how the induced refractive index difference decays over time, the assumed decay formula having parameters that depend on temperature. The method includes the steps of: determining the (temperature dependent) parameters in the assumed decay formula for both an operating temperature and an annealing temperature, the annealing temperature being higher than the operating temperature, by fitting the observed decay over a measuring time at the two temperatures; and determining an anneal time at the annealing temperature based on a maximum allowed drift at the operating temperature. In operation, an optical waveguide is then annealed at the anneal temperature for the anneal time to provide a heat treatment (annealing) process for stabilizing Bragg gratings inscribed in the optical waveguide.
    • 本发明提供了一种退光光波导的方法,该光波导包括光纤或大直径波导结构,沿着某种长度具有随时间衰减的诱导折射率差异,并且因此当宽带光为...时导致反射光的波长漂移 插入光波导中。 该方法使用假定的衰减公式来表示诱导折射率差异随时间的衰减如何,所假定的衰变公式具有取决于温度的参数。 该方法包括以下步骤:通过在所测量的时间内将所观察到的衰减拟合,确定在工作温度和退火温度下的假定衰减公式中的(温度依赖)参数,退火温度高于工作温度 两个温度 以及基于工作温度下的最大允许漂移,在退火温度下确定退火时间。 在操作中,然后在退火温度下将光波导退火退火时间,以提供用于稳定内插在光波导中的布拉格光栅的热处理(退火)工艺。
    • 9. 发明授权
    • Compression-tuned grating-based optical add/drop multiplexer
    • 压缩调谐光栅光分插复用器
    • US06633695B2
    • 2003-10-14
    • US09800918
    • 2001-03-06
    • Timothy J. BaileyMark R. FernaldAlan D. KerseyTrevor W. MacDougallMartin A. PutnamPaul E. Sanders
    • Timothy J. BaileyMark R. FernaldAlan D. KerseyTrevor W. MacDougallMartin A. PutnamPaul E. Sanders
    • G02B628
    • G02B6/2932G02B6/022G02B6/29322G02B6/29383G02B6/29395G02B6/29398H04J14/021
    • A compression-tuned fiber Bragg grating based reconfigurable wavelength add/drop module has a compression force assembly and an all-glass Bragg grating compression unit having gratings spaced along an axis of compression. The compression force assembly responds to a control electronics signal containing information about a selected wavelength of a channel to be added to or dropped from an optical traffic signal, for providing a compression force applied along the axis of compression. The compression unit responds to the optical traffic signal and the compression force, for providing an all-glass Bragg grating compression unit optical signal having the selected wavelength of the channel to be added to or dropped from the optical traffic signal. The compression unit optical signal may include either the traffic with an added reflected channel(s), or a dropped reflected channel(s). The compression unit is a “dogbone” structure having either a glass tube with an optical fiber fused therein, or a single large diameter waveguide having a core. The core of the optical fiber or waveguide has the gratings spaced therein. The axis of compression is parallel with the longitudinal axis of the dogbone structure.
    • 基于压缩调谐光纤布拉格光栅的可重构波长加/减模块具有压缩组件和全玻璃布拉格光栅压缩单元,其具有沿压缩轴间隔开的光栅。 压缩力组件响应于控制电子信号,该控制电子信号包含关于要添加到或从光学交通信号中掉落的信道的选定波长的信息,以提供沿着压缩轴施加的压缩力。 压缩单元响应于光学交通信号和压缩力,用于提供具有要被添加到或从光学交通信号中掉落的信道的所选波长的全玻璃布拉格光栅压缩单元光信号。 压缩单元光信号可以包括具有附加反射信道的业务或者丢弃的反射信道。 压缩单元是具有熔合在其中的光纤的玻璃管或具有芯的单个大直径波导的“狗骨”结构。 光纤或波导的核心具有间隔开的光栅。 压缩轴线与狗骨架结构的纵向轴线平行