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.
Parameters | Units | Specifications | Tolerance |
Center Wavelength Rang | nm | 1625 | ±0.3 |
1650 | ±0.3 | ||
Reflectivity | - | 0.5%~99.9% | ±5% |
FWHM | nm | 1~20 | ±0.1 |
SMSR | - | >8dB | |
Recoating | - | Acrylate | |
Proof test | - | >100Kpsi | |
Fiber Type | - | SMF-28e or custom | |
Operating Temperature | ℃ | 0~75 | |
Storage Temperature | ℃ | -20~85 | |
Termination | - | Bare fiber,FC/PC,FC/APC,etc | |
Athermal Package(optional) | - | <1.5pm/°C |
FTTH reflector、Gain flattening filter 、Fiber sensor 、Fiber filter、Dispersion compensation module