为了有效检测输油管道应变, 首先, 提出采用有限元软件对支吊架结构输油管道施加载荷, 仿真管道表面应变分布, 从而优化分布式光纤输油管线应变检测排布方式; 然后, 在实验中将传感光纤沿轴向黏贴于管道外表面, 通过布里渊光时域分析仪(BOTDA)测量光纤布里渊频移, 以对管道表面应变分布进行实时监测。对比仿真和实验数据可知, 管道顶部和底部对应变敏感, 且管道表面应变分布的仿真结果与实验数据基本吻合。

通过有限元分析软件对硬质聚氯乙烯材料支吊架结构管道建立模型，采用中央竖直向下施加静态持续载荷方式进行力学仿真。将传感光纤沿轴向直线排布在模拟管道顶部、底部和侧部，通过粘贴传感器将管道外表面应变传递至传感光纤，并采用布里渊光时域分析仪对不同载荷下管道的应变变化进行监测。结果表明：管道轴向方向到管道底部为拉伸正应变，顶部为压缩负应变，侧部中线的应变基本不变；管道中段的应变最大，向管道两端的应变逐渐减小，距离管道端部0.6 m处的应变趋于0。此外，油气管道中段底部的应变灵敏度为顶部的3.3倍，为支撑端的5.5倍。

A novel scalable and integrated design that supports optical multicast and burst amplification is proposed and demonstrated experimentally. The powers of incoming signals can be tuned to optimize the results of burst amplification and replication. Experimental results also show that erbium-doped optical Fiber amplication (EDFA) transients can be suppressed to an equally low level regardless of the burst parameters. Extended structure designs are further proposed to satisfy the need of mass replication of multicast signals.

A scheme for photonic generation of ultra-wideband (UWB) pulses using a semiconductor optical amplifier (SOA) and an electro-absorber (EA) in parallel is proposed and numerically demonstrated. By adjusting the time delay between two pump signals incident into the SOA and the EA, we can obtain monocycle pulses with reversed polarities and different bandwidths. The proposed method is flexible in pulse shaping and easy in practical optimization.