Chat with us, powered by LiveChat

All Grating Fibers (AGF®)

The All Grating Fiber (AGF®) is an optical fiber containing densely spaced low reflective (R<0.1%)  Draw Tower Gratings (DTG®s). The spatial separation from center to center can be as small as 10mm and the FBG length can be chosen such that more than 95% of the fiber contains gratings.

The All Grating Fiber (AGF®) is an optical fiber containing densely spaced low reflective (R<0.1%)  Draw Tower Gratings (DTG®s). The spatial separation from center to center can be as small as 10mm and the FBG length can be chosen such that more than 95% of the fiber contains gratings. The fiber is designed to be used with an OFDR (optical frequency domain reflectometry) system that allows for fast and precise measurements over a wide strain or temperature range with spatial resolution down to a few mm over the entire fiber length.

AGF-LBL-1550-125

The Low Bend Loss fiber LBL-1550-125 has a cladding diameter of 125µm and is optimized for operation in the 1550nm wavelength window. The glass composition has also been tuned such that the fiber maintains a good signal transmission under small bending diameters.

AGF-LAL-1550

The Low Attenuation Loss fiber LAL-1550-125 has a cladding diameter of 125µm and is optimized for operation in the 1550nm wavelength window. The glass composition has also been tuned such that the fiber gives a good compromise between signal transmission under small bending diameters and attenuation.

AGF-LBL-1550-80

The Low Bend Loss fiber LBL-1550-80 has a cladding diameter of 80µm and is optimized for operation in the 1550nm wavelength window. The glass composition has also been tuned such that the fiber maintains a good signal transmission under small bending diameters.

Parameter AGF-LBL-1550-125 AGF-LAL-1550 AGF-LBL-1550-80
Reflectivity (for grating length of 8mm) < 0.1%
Centre wavelength 1510–1590 nm
Absolute wavelength accuracy1 ≤ 0.5 nm
DTG® length 1–10 mm
Attenuation @ 1550 nm < 8.6 dB/km < 1 dB/km < 8.6 dB/km
Mode Field Diameter (MFD) @ 1550 nm 6 μm (typical) 7.8 μm (typical) 6 μm (typical)
Numerical Aperture (NA) 0.26 (typical) 0.14 (typical) 0.26 (typical)
Cladding diameter 125 μm ± 1 μm 80 μm ± 1 μm
Coating type2 ORMOCER®/ORMOCER®-T / One layer Acrylate
Coated fibre diameter 195 μm (typical) 120 μm (typical)
Tensile load at break3 > 50 N (corresponds to > 5% strain) > 20 N (corresponds to > 5% strain)
Temperature sensitivity4 (formula Δλ/(λ ⋅ ΔT)) 6.5 K-1 ⋅ 10-6 (typical)
Strain sensitivity1 (formula: Δλ/(λ ⋅ Δε)) 7.8 με-1 ⋅ 10-7 (typical)
Operational temperature range5 -200–200°C for ORMOCER®
-20–200°C for ORMOCER®-T
-20–90°C for One layer Acrylate

1 measured at room temperature
2 Ormocer® is mainly applied for strain measurements while Ormocer®-T is recommended for temperature measurements.
3 According to IEC-60793-1-31 using a constant displacement of 30mm/minute.
4 measured between 0°C and 70°C
5 temperature range is dependent on exposure time

Draw Tower Gratings (DTGs) are produced using a process that combines the drawing of the optical fiber with the writing of the grating. The input of the process is a glass preform. After heating the preform, the pulling and formation of the fibre will be initiated. Further in the production process, the fiber crosses the optical axis of a laser and the interferometer that create a periodical UV-light interference pattern in order to write the grating.  Using a pulse selector and taking into account the draw speed, FBGs can be accurately positioned in the fiber. When the grating has been written the fiber is coated by entering a coating reservoir, followed by a curing step of the coating. Finally the location of the DTG is marked automatically and the fiber is reeled onto a drum. This process of simultaneously drawing the fiber, writing the grating and coating the fiber directly after the grating inscription, results in high strength grating chains. As such the commonly used stripping and recoating process of standard FBGs is not necessary and the pristine fiber strength is maintained during the DTG manufacturing process.

 

Download technical information

Please fill in your information to download more information on our components.

* These fields are required.

How we use your information

We are committed to respecting your privacy and protecting your personal information and will always treat it with the upmost care. You can find out how we handle your data and all the ways we use it to provide you with a better service in our Privacy Statement.

By submitting this form, you consent to the use of your data in accordance with our Privacy Statement.

Sign up for newsletter
Contact us
CAPTCHA image

* These fields are required.

How we use your information

We are committed to respecting your privacy and protecting your personal information and will always treat it with the upmost care. You can find out how we handle your data and all the ways we use it to provide you with a better service in our Privacy Statement.

By submitting this form, you consent to the use of your data in accordance with our Privacy Statement.

Germany

FBGS Technologies GmbH
Winzerlaer Straße 2
D-07745 Jena

Belgium

FBGS International NV
Bell Telephonelaan 2H

B-2440 Geel

China

X2 Suzhou Electronic Technology
Room 103, No. 388
Xinping Str. SIP, Suzhou