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Fiber Bragg Grating (FBG) filter at 1650 nmis an important device for communication link detection in opticalcommunication field. The principle is equivalent to a band-pass filter Fiber Bragg Grating (FBG) filter at 1650 nmis an important device for communication link detection in opticalcommunication field. The principle is equivalent to a band-pass filter Fiber Bragg Grating (FBG) filter at 1650 nmis an important device for communication link detection in opticalcommunication field. The principle is equivalent to a band-pass filter, whichcompletely ref Fiber Bragg Grating (FBG) filter at 1650 nmis an important device for communication link detection in opticalcommunication field. The principle is equivalent to a band-pass filter, whichcompletely ref |