• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>RIAO/OPTILAS 2004 >Fiber laser hydrogen sensor codified in the time domain
【24h】

Fiber laser hydrogen sensor codified in the time domain

机译：时域编码的光纤激光氢传感器

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A novel scheme for a fiber optic hydrogen sensor is presented. The sensor is based on an erbium-doped fiber laser with a Pd-coated tapered fiber within the laser cavity acting as the hydrogen-sensing element. When the sensing element is exposed to a hydrogen atmosphere, its attenuation decreases changing the cavity losses, which leads to a modification of the switching-on laser transient. The hydrogen concentration can be obtained by a simple measurement of the build-up time of the laser. This technique translates the measurement of hydrogen concentration into the time domain. Sensing techniques translating the measurement to the time domain offer the possibility to acquire and process the information very easily and accurately using reliable and low-cost electronics. We have also studied the influence of the pumping conditions. We have found that changing from a 100 % modulation depth of the pump to biasing the laser with a certain pump power (being this value always below the laser threshold) the sensitivity of the sensor is substantially enhanced. Hence the sensitivity of the fiber laser sensor can be adjusted to certain requirements by simply controlling the pump. Relative build-up times variations of up to 55 % for 10 % hydrogen concentration are demonstrated.
机译：提出了一种用于光纤氢传感器的新颖方案。该传感器基于掺fiber光纤激光器，在激光腔内具有Pd涂层的锥形光纤充当氢感测元件。当传感元件暴露于氢气氛中时，其衰减会减小，从而改变腔损耗，从而导致接通激光瞬态的改变。氢浓度可以通过简单地测量激光器的聚集时间来获得。该技术将氢气浓度的测量值转换为时域。将测量转换为时域的传感技术提供了使用可靠且低成本的电子设备非常轻松，准确地获取和处理信息的可能性。我们还研究了抽水条件的影响。我们发现，从泵浦的100％调制深度改变为以一定的泵浦功率偏置激光（该值始终低于激光阈值），可以大大提高传感器的灵敏度。因此，可以通过简单地控制泵来将光纤激光传感器的灵敏度调整到某些要求。氢浓度为10％时，相对堆积时间变化高达55％。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号