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chirped bragg grating

Chirped FBG

The grating period of Chirped FBG is not constant, but varies along the axial direction. Different grating periods correspond to different Bragg reflection wavelengths, and incident light of different wavelengths is reflected at different positions of the chirped fiber grating, so that the light of different wavelengths will produce an optical path difference after being reflected by the chirped fiber grating. Using this effect of chirped fiber grating, the dispersion compensation of different wavelength signals in long-distance fiber communication can be effectively realized.

Features of Chirped FBG

  • Wide Bandwidth

  • Low Insertion Loss

  • High Reflectivity

Application of Chirped FBG

  • Gain Flattening Filter

  • Dispersion Compensation

  • FTTH

  • CWDM System

  • ASE filtering, noise suppression

  • WDM 1300/1550nm band rejection filter

Specifications of Chirped FBG

Parameter

Unit

Value

Center Wavelength

nm

1064, 1530, 1550, 1575, 1590, 1625, 1650

Wavelength Tolerance

nm

+/-0.25

Reflectivity

%

10~99

Bandwidth (FWHM)

nm

10 (1-15)

SLSR

dB

>10

Insertion Loss

dB

<0.5

FBG Recoating

--

None, Acrylate, Polyimide, or custom

Tensile Strength

kpsi

>100

Fiber Type

--

Single-Mode

Fiber Coating

--

Acrylate, Polyimide, or custom

Pigtail Length

m

Standard 1m both ends, or custom

Optical Connector

--

Bare Fiber, FC/APC, SC/APC, or custom


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