Uniform 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.

We produce the uniform gratings with grating length 0.5mm to 10mm. Such gratings have FWHM from 0.015nm (R=25%) to 0.03nm (R=90%) for wavelength 633nm (0.1nm and 0.17nm at wavelength 1580nm) and gratings length 9mm. Standard Uniform FBGs have bandwidth 0.15nm – 0.6nm, reflectivity 5% - 99% and gratings length 1mm – 3.5mm. Fiber Bragg gratings are sensitive to strain and temperature changes. Uniform FBGs can be provided as separated or chain of FBGs with different wavelength. Multy - points temperature, strain or other physical parameter monitoring are available by use of chain FBGs. Different types of single mode optical fibers and fibers coating are used for writable. Acrylate coating fibers applying for normal temperature range 40˚C to +100˚C. Polyimide or metal (Cu, Al) coating fibers are used for high temperature application with maximum temperature 300˚C and 500˚C respectively. The experimental and theoretical reflection spectrum of FBGs 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

633, 780, 794, 797, 799, 801, 809, 830, 852, 895, 940, 976, 1030, 1057, 1060, 1064, 1080, 1125, 1150, 1178, 1240, 1270, 1310, 1484,1510 ÷ 1580, 1650,  1900, 1908, 1952, 2300

± 0.1 ÷ ± 1 custom request

Reflectivity, %

0.2 ÷ 99,9

2 ÷ 5 custom request

Bandwidth (WFHM), nm

0.05 ÷ 1,2

custom request


~ 8

or custom

FBG Pigtail Length, m

≥ 0.5

or custom

FBG Recoating

None, Acrylate, Polyimide, Aluminium, Copper

or custom

Tensile Strength, kpsi

› 100


Optical Connector

Bare fiber, FC/APC, LC/APC

or custom

 Uniform FBG (Article GTL-FBG-UF-810)


Application of our Uniform FBG products in articles

 Tm3+-doped tellurite fiber weak signal amplifier at a wavelength of 2.27 µm

Publication: Results in Physics, Tom 27, 2021/8/1, Autors: VA Kamynin, SA Filatova, BI Denker, BI Galagan, VV Koltashev, OI Medvedkov, SE Sverchkov, VB Tsvetkov