Tunable microwave fiber-optic bandpass filters
Tunable microwave fiber-optic bandpass filters
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DOI：
10.1109/68.769737
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发表时间：
1999-07
影响因子：
2.6
通讯作者：
D. Hunter;R. Minasian
中科院分区：
文献类型：
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作者：
D. Hunter;R. Minasian
提出了一种既能实现高分辨率带通微波响应又能实现宽调谐的新型光子滤光片。这是基于使用长啁啾布拉格光栅和一段有源光纤，并通过改变载波波长来获得调谐。实验证明，微调范围为20%，并且可以很容易地扩展。给出了描述滤波器频率限制的模型，并给出了克服光栅色散限制的设计准则。这种新结构可以实现快速调谐、高Q的宽带连续可调滤波器。
A new photonic filter which can realize both high-resolution bandpass microwave response and which is also widely tunable is presented. This is based on the use of long chirped Bragg gratings and a section of active fiber, and tuning is obtained by changing the carrier wavelength. A fractional tuning range of 20% is demonstrated experimentally, and this can readily be extended. A model is presented to describe the frequency limitations of the filter, and design guidelines are given to overcome the grating dispersion limits. The new structure enables the realization of wide-band continuously tunable filters with fast tuning and high-Q.