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Chirped FBG

The refractive index profile of the grating may be modified to add other features, such as a linear variation in the grating period, called a chirp. The reflected wavelength changes with the grating period, broadening the reflected spectrum. A grating possessing a chirp has the property of adding dispersion—namely, different wavelengths reflected from the grating will be subject to different delays. This property has been used in the development of phased-array antenna systems and polarization mode dispersion compensation, as well.

Reflection spectrum
Reflection spectrum
Transmisson spectrum
Transmisson spectrum

Product Parameters

ParametersUnitsSpecificationsTolerance
Center Wavelength Rangnm

1625

±0.3
1650±0.3
Reflectivity-0.5%~99.9%±5%
FWHMnm1~20±0.1
SMSR->8dB
Recoating-Acrylate
Proof test->100Kpsi
Fiber Type-SMF-28e or custom
Operating Temperature0~75
Storage Temperature-20~85
Termination-Bare fiber,FC/PC,FC/APC,etc
Athermal Package(optional)-<1.5pm/°C

Product Application

FTTH reflector、Gain flattening filter  、Fiber sensor 、Fiber filter、Dispersion compensation module