The strain sensitivity was demarcated by experiment using spectrum character of ASE demodulation.

并通过实验标定ASE光源谱特性解调应变灵敏度系数。

youdao

The spectrum of fiber Bragg grating(FBG) in inhomogeneous strain fields is distorted due to its inhomogeneity of both the periods and the effective refractive index.

当非均匀应变场作用在光纤布拉格光栅（FBG）上时，由于FBG周期和有效折射率在沿FBG长度方向都为变量，所以会导致光谱形状的变化。

youdao

In comparison with the effect to temperature to the wavelength of reflected spectrum, the effect of strain to the bandwidth of reflected spectrum could be neglected.

与温度对光纤光栅反射谱波长的影响相比，对其带宽的影响可忽略。

youdao

At the same time, rising smartphone penetration and the burgeoning data needs of subscribers using mobile devices such as the iPhone is putting a lot of strain on its 3G network that needs additional spectrum for strengthening.

FORBES: Move up http://i.forbesimg.com t Move down

At the same time, rising smartphone penetration and the burgeoning data needs of subscribers using mobile devices such as the iPhone is putting a lot of strain on its 3G network that needs more investment and additional spectrum for strengthening.

FORBES: AT&T Eyes Data Growth With $14 Billion Network Overhaul