不同的光纤光栅可具有不同的中心波长，利用光通信技术中的波分复用技术，可以实现在一根光缆中同时传输多个不同中心波长的光信号，将这些不同波长的光纤光栅传感器级联在一根光缆上，构成传感器线性阵列拓扑结构，则可以实现准分布式的多点测量。将基于波分复用技术的光纤布拉格光栅传感器线性阵列测温系统应用于大体积混凝土施工过程中的温控测量，目前在国内尚不多见。通过在三峡工程升船机塔柱安全监测项目的温控测量，为延拓光纤布拉格光栅测温系统的应用范围积累了一些有益经验，也为光纤布拉格光栅测温系统应用于大型水利工程的混凝土温控测量获取了宝贵资料。

Different fiber gratings have different center wavelengths. Many center wavelength optical signals can be transmitted simultaneously through only one optical fiber cable by the wavelength division multiplexing (WDM) technology of optical communication. The center wavelength fiber Bragg grating sensors are cascaded on the same optical fiber cable to comprise a linear array topological structure of sensors, hence, the quasi distributed measurement of multiple points could be achieved. This technology is rarely applied to the temperature monitoring of mass  concrete in China. We accumulated useful experiences and acquired valuable data by temperature controlling and measuring for the towers of the ship elevator of Three Gorges Project through fiber Bragg grating system.  