裸光纤

作者提出一种新型的涂层光纤传感器，传感头是在裸光纤外周涂以SnO2薄层。

A new coated optical fiber sensor is designed by authors .

裸光纤布拉格光栅和镀金FBG温度传感器的温度灵敏系数KT分别为0.0101nm/℃和0.0283nm/℃。

The sensitivities of the bare FBG and the FBG temperature sensor with plating gold K_ T are 0.0101 nm / ℃ and 0.0283 nm / ℃ respectively .

两种传感器在线性变化区间的温度灵敏系数KT分别为28.2pm/℃和21.3pm/℃，分别是裸光纤布拉格光栅的3倍和2.3倍，它们的线性拟合度都超过0.999。

The sensitivities KT of two temperature sensors are 28.2 pm / ℃ and 21.3 pm / ℃ respectively during linear change , and they are 2.89 and 2.28 times as large as that of a bare FBG . Their pertinence coefficients are more than 0.999 .

从实验上获得了0.0676nm/MPa的压力响应灵敏度，约是裸光纤布拉格光栅压力响应灵敏度的23倍，本传感器的压力响应具有很好的线性，压力测量范围可达30MPa以上。

The pressure sensitivity ( 0.0676nm / MPa ) of the sensor is reached from experiment . It is 23 times of that of the bare FBG . The linearity of the sensor is good .

阐述了对裸光纤光栅进行涂覆的原理和必要性。

The principle and necessity of coating the fiber gratings are expatiated .

裸光纤光栅及其封装后的低温特性

Low Temperature Characteristics of the Bare Fiber Bragg Grating and Its Package

研究了这种新型光纤光栅温度传感器的低温特性，并与裸光纤光栅和铝基封装的光纤光栅进行了比较，结果表明这种新型的光纤光栅温度传感器具有很好的低温响应特性。

The temperature response characteristic of this new fiber Bragg grating temperature sensor is good .

采用新的设计，研制出单根裸光纤可减少能量损耗，使得光谱信噪比提高。

New design was applied to obtaining one bare fiber optics , which has a minor energy loss and higher signal-to-noise ratio .

本论文的主要内容：1.使用裸光纤光栅和钢片封装的光纤光栅两种传感器对钢结构进行了应力检测。

The main contents include : 1 . We use bare FBG and steel encapsulated FBG to test the strain of steel structures .

给出了一种利用裸光纤作为探头扫描测量半导体激光器线阵输出光束强度分布的方法。

A method for the measurement of beam intensity dis-tribution at the facet of laser diode array with bare silica fiber probe is proposed .

由于基底材料的带动作用，封装后的光纤光栅温度灵敏度为83.07×10~（-6）/℃，是相应裸光纤光栅的12.3倍。

By driving effect of the polymer substrate , the temperature sensitivity was 83.07 × 10-6 / □, that is 12.3 times as that of a bare fiber grating .

1100cm-1特征峰在锥区的波数最高，熔区次之，裸光纤最小；

The wave number of the former peak is highest at the taper region , the one at the fused region followed , and the one of bare fiber lowest .

这种光纤探针的特点是在裸光纤外镀纳米复合薄膜，通过控制纳米复合薄膜内纳米金属颗粒的位置，可以制备探针尖端存在单个纳米金属颗粒的光纤探针。

The novel fiber tip is characterized that nano-composite film is covered on the uncoated fiber tip . By controlling the location of silver particle in film , metallic nano-particle probe can be manufactured .

用一段直径为600μm的裸石英光纤代替柱透镜对半导体激光器输出光束进行准直整形；用半球端光纤对光束进行聚焦后直接实现和光纤耦合，来代替聚焦透镜和光纤耦合的环节。

The output light from laser diode is collimated using a section of optical fiber with the diameter of 600 μ m instead of cylinder lens , and a sphere-end lens fiber replaces the coupling part with focus lens coupling the light to the fiber .