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400 degC high temperature FBG realized in AtGratingUpdate:2015-08-15
Using unique technologies, AtGrating realized the FBG with high temperature at 400 degC for one customer in German.  The bare FBG can be packaged to be temperatuer sensor and high temperature pressure sensor. 

Here is the datasheet for bare FBG stored in 420 degC. 

Duration(Hours) at 420C Wavelength(nm) Transmission Loss(dB)
0 1529.931 6.02
2 1529.932 6.03
4 1529.928 5.81
8 1529.923 5.6
16 1529.926 5.15
22 1529.934 5.15
29 1529.938 5.15
37 1529.929 5.15
45 1529.935 5.15
51 1529.93 5.14
58 1529.929 5.15
100 1529.931 5.05
200 1529.935 5.07
300 1529.933 5.04



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