Performance improvement of optical reflectometry and tomography with synthesis of optical coherence function

通过合成光学相干函数改进光学反射测量和断层扫描的性能

• 批准号: 09305030
• 负责人: HOTATE Kazuo
• 金额: $ 16.64万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09305030/
• 关键词: Reflectometry; Optical tomography; Coherence function; Photonic sensing; Brillouin scattering; Smart materials and structures; Diagnosis of lightwave networks; Distributed and multiplexed photonic sensing; 光ファイバ加入者系; トモグラフィー; ファトニックセンシング; 光加入者系

The purpose of this research is to improve the accuracy of "Synthesis of Optical Coherence Function (SOCF)", that is the original technology of the project reader. Various photonic functional systems, which are realized by using the SOCF, are also investigated in this project.Reflectometry systems for diagnosing devices at a long distance of about 5km through optical fibers in subscriber networks have been proposed and experimented. Spatial resolution of 6cm has been achieved at 5km distance. This performance ha not yet been realized by other systems. Optical systems to measure force distribution along a fiber have also been invented by applying the SOCF. Positions of polarization mode coupling in a high birefringent fiber due to the applied force can be measured with 9m resolution through 1km measurement range. Triangle shaped coherence function has also been applied to realize immediate positioning of the force, and digital processing has also been used to improve the accuracy. These … More systems can be used for smart structures and security systems. Multiplexed fiber optic interferometric sensors have demonstrated by using SOCF technology. Optical tomography system has also been invented, in which we need no data calculation and can simplify the mechanical scanning scheme. A system without any mechanical moving parts has also been constructed. A system for diagnosing each surface profile in optical media with multiple inner surfaces has also been realized. A fiber optic system for measuring stress distribution along a fiber has also been invented, in which frequency shift of Brillouin scattering in the fiber is used to measure the stress. Stimulated Brillouin scattering is localized by using SOCF technique with cm order spatial resolution. In the experiment, 6.5cm resolution has been demonstrated. On the contrary, spatial resolution limitation in traditional time domain technologies is only 1m.We believe that enough research results have been accumulated in this project. Less

这项研究的目的是提高“光学相干函数合成（SOCF）”的准确性，即项目阅读器的原始技术。在此项目中还研究了通过使用SOCF实现的各种光子功能系统。已提出和实验，通过订户网络中的光纤长距离诊断设备进行诊断设备的反射测定系统。在5公里距离处达到了6厘米的空间分辨率。这种性能HA尚未由其他系统实现。通过应用SOCF，也发明了沿着纤维的力分布的光学系统。由于施加力而导致的高双重纤维中极化模式的位置可以通过9m的分辨率通过1公里的测量范围来测量。三角形相干功能也已应用于实现力的立即定位，数字处理也被用来提高准确性。这些……更多的系统可用于智能结构和安全系统。通过使用SOCF技术证明了多重光纤干涉传感器。还发明了光学断层扫描系统，其中我们不需要数据计算，并且可以简化机械扫描方案。也已经构建了没有任何机械运动部件的系统。用于诊断的系统也已经实现了具有多个内部表面的光学介质中的每个表面剖面。还已经发明了用于测量沿纤维应力分布的光纤系统，其中使用纤维中布里鲁因散射的频移来测量应力。通过使用CM顺序空间分辨率的SOCF技术，刺激的Brillouin散射位置。在实验中，已经证明了6.5厘米的分辨率。相反，传统时域技术中的空间分辨率限制仅为1。我们相信该项目已经积累了足够的研究结果。较少的

项目成果

K. Hotate Fiber Sensor Technology Today<Invited>: "Optics Fiber Technology(Academic Press)"3.. 1997. 402 (356)

K. Hotate当今光纤传感器技术<特邀>：《光纤技术（学术出版社）》3.. 1997. 402 (356)

Z. -Y. He and K. Hotate: "Synthesized optical coherence tomography for scattering objects using stepwise frequency modulated tunable laser."Optics Letters.. vol. 24, no. 21. 1502-1504 (1999)

Z.-Y。

K.Hotate,X.Song and Z-Y.He: "Stress-location measurement along an optical fiber by synthesis of optical coherence function"Proc. SPIE Fiber Optic and Laser Sensors and Applications. SPIE3860. 296-303 (1999)

K.Hotate，X.Song和Z-Y.He：“通过合成光学相干函数进行沿光纤的应力定位测量”Proc。

Z. Y. He N. Mkohzaka,and K. Hotate: "Selective image extraction by synthesis of the coherence function using two dimensional optical lock-in amplifier with microchannel spatial light modulator"IEEE Photonics Technology Letters. 9.4. 514-516 (1997)

Z. Y. He N. Mkohzaka 和 K. Hotate：“使用二维光学锁定放大器和微通道空间光调制器合成相干函数来选择性图像提取”IEEE 光子技术快报。

T.Saida, K.Hotate: "High spatial resolution reflectometry by synthesis of optical doherence function for measuring reflectivity distribution at a long distance" IEEE Photonics Technology Letters. 10・4 (to be published). (1998)

T.Saida、K.Hotate：“通过合成光学相干函数来测量长距离反射率分布的高空间分辨率反射测量”IEEE 光子技术快报 10・4（待出版）。