| 光纤带宽特性对VISAR测试影响的分析 |
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| 引用本文： | 彭其先,马如超,李泽仁,刘俊,刘元坤,邓向阳.光纤带宽特性对VISAR测试影响的分析[J].高压物理学报,2002,16(3):237-240. |
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| 作者姓名： | 彭其先 马如超 李泽仁 刘俊 刘元坤 邓向阳 |
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| 作者单位： | 中国工程物理研究院流体物理研究所,四川绵阳,621900 |
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| 摘 要： | 对多模光纤的带宽特性进行了分析，发现阶跃折射率光纤的带宽只能做到数兆赫兹·千米，而梯度折射率光纤的带宽可达数吉赫兹·千米。对光纤传输VISAR中的测试信号进行了讨论，认为阶跃折射率光纤的带宽已限制了VISAR测试系统的时间分辨本领。提出用渐变折射率光纤代替阶跃折射率光纤，可以有效地减小带宽对VISAR测试的限制，从而提高系统的频带响应特性。
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| 关 键 词： | 带宽 VISAR 光纤 |
| 文章编号： | 1000-5773(2002)03-0237-04 |
| 收稿时间： | 2001-07-27; |
| 修稿时间： | 2001年7月27日 |
THE BANDWIDTH OF OPTICAL FIBER AND ITS RESTRICTIONS ON VISAR |
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| PENG Qi xian,MA Ru chao,LI Ze ren,LIU Jun,LIU Yuan kun,DENG Xiang yang.THE BANDWIDTH OF OPTICAL FIBER AND ITS RESTRICTIONS ON VISAR[J].Chinese Journal of High Pressure Physics,2002,16(3):237-240. |
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| Authors: | PENG Qi xian MA Ru chao LI Ze ren LIU Jun LIU Yuan kun DENG Xiang yang |
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| Institution: | Institute of Fluid Physics, CAEP, Mianyang 621900, China |
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| Abstract: | The effects of the optical fiber bandwidth on VISAR system were investigated. It was estimated that the index-stepped multi-mode optical fiber could only reach a bandwidth of several MHz&;#8226;km while the index-graded optical fiber could easily reach a bandwidth of several GHz&;#8226;km. The experimental results confirmed that the index-stepped optical fiber did restrict the time resolution of VISAR due to its limited band width. So using the index-graded optical fiber, instead of the index-stepped fiber, may be an effective way to free the VISAR from the restriction of optical fiber bandwidth and advance the VISAR system. |
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| Keywords: | bandwidth VISAR optical fiber |
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