Chirped FBG
Chirped gratings are structures where the optical period of the index modulation varies along the grating length. AtGrating manufactures the chirped grating by using chirped phase mask. By modifying the intensity of grating depth for reaching any predefined gain compensation profile that creates the gain flat filter. With ultra wide bandwidth that also create wide band filter as well as serving the distributed sensing.

Gain Flattening Filter
Dispersion compensation
CWDM system

Wide Bandwidth
Low Insertion Loss
High Reflectivity


Parameters Unit Values
Center Wavelength nm 1550nm & 1650nm
Reflectivity % 10~99
FWHM nm 10 (typical)
Insertion Loss dB <0.5
Fiber Termination -- Bare Fiber, FC/UPC Or FC/APC
Fiber Type   SMF-28 Or Compatible
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