Chirped FBG


Fiber Bragg Gratings have many applications in optical communication, laser technique and sensing systems. The FBGs are widely used like in-fiber mirrors or optical filters with narrow band optical spectrum. FBGs can be used like a sensitive element for strain and temperature measuring.

The Chirped FBG has linear variation of the FBG period along the grating length. Chirped FBG is manufactured by using non – periodic phase mask. Available chirp rate of the phase mask period can be 0.01nm/cm – 30nm/cm. Therefore such FBGs have wide spectrum bandwidth and special dispersion characteristic. Chirped FBGs are useful for gain flattening EDFA and ASE light sources, band stop filters, in ultrafast mode – locked fiber lasers, powerful laser and chromatic dispersion compensation telecom systems. The optical spectrum of high reflection Chirped FBG for powerful fiber laser is presented in the graph.

















Wavelength range, nm

600÷ 2300

± 0.1 ÷ ± 1 custom request

Types of fiber

Single-Mode, PM, Double clad, LMA

or custom

Wavelength to quick order, nm

1069 Chirp rate: 2.9 nm/cm, 

1081 Chirp rate: 1.02 nm/cm, 

1529 Chirp rate: 19.96 nm/cm, 

1875 Chirp rate: 4.08 nm/cm

± 0.1 ÷ ± 1 custom request

Reflectivity, %

5 ÷ 99

2 ÷ 5 custom request

Chirp Rate, nm/cm

0.01 ÷ 30

custom request

Bandwidth (WFHM), nm

2 ÷ 50

custom request

Grating (FBG) Length, mm

2 ÷ 50

custom request


~ 8

custom request

FBG Pigtail Length, m

≥ 0.5

or custom

FBG Recoating

None, Acrylate, Polyimide

or custom

Tensile Strength, kpsi

› 100


Optical Connector

Bare fiber, FC/APC, LC/APC

or custom

 Chirped FBG (Article GTL-FBG-CR-840)