发现光纤光栅F P干涉仪的透射率和光谱半宽度对轴向应变十分敏感，而F P腔的中心波长和工作模式却变化较小。
That transmission rate and the FWHM of the fiber grating FP are very sensitivity for radial strain. But the central wavelength, mode number of the fiber grating FP are insensitivity for radial strain.
获得的光谱谱线轮廓具有典型的对称性线型，测得的谱线半宽度为3.2千兆赫。
The obtained profile of spectral line has a typical and symmetrical shape of line. The line width (FWHM) was measured to be 3. 2 GHz.
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