DCF with FBG
Hello every one..
I want to know,when i used only FBG technique for 100km length of SMF .Q-factor is around 38 and using only DCF Q-factor is around 22 with 0.2db/km attenuation .but when i combine both the technique Q-factor is reduced what is reason behind this?Is there any method to improve the Q-factor with combine technique(DCF+FBG).It should be increased after combining…
In most of the cases we use amplifier before and after DCF to improve Q-factor but in case of FBG only one amplifier is sufficient …Then why DCF is also called good technique?
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