FBGS DTG - Draw Tower Gratings
We offer three types of DTG® with unique characteristics compared to classically produced FBGs, such as extremely high breaking-strength, spliceless array configuration and uniform coating coverage. FBG parameters and coating material can be selected based on customer needs.
1550-125
Draw Tower Gratings (DTG®s) written in Low Bend Loss fiber LBL-1550-125 which has a cladding diameter of 125µm and is optimized for operation in the 1550nm wavelength window. The glass composition has been tuned such that the fiber maintains a good signal transmission under small bending diameters.
830-125
Draw Tower Gratings (DTG®s) written in Low Bend Loss fiber LBL-830-125 which has a cladding diameter of 125µm and is optimized for operation in the 830nm wavelength window. The glass composition has been tuned such that the fiber maintains a good signal transmission under small bending diameters.
Draw Tower Gratings (DTG®s) written into Low Bend Loss fiber LBL-1550-80 which has a cladding diameter of 80μm and is optimized for operation in the 1550nm wavelength window. The reduced cladding diameter offers several major advantages compared to standard 125µm fibers:
- Unobtrusiveness – particularly interesting for embedding applications including carbon composite structures and medical catheters.
- Increased sensitivity – less force is required to strain the fiber enhancing the performance of sensors based on force or acoustic sensing.
- Reduced bending radii – lower surface strain levels enabling more compact sensor designs.
- measured at room temperature
- ORMOCER® is mainly applied for strain measurements while ORMOCER®-T is recommended for temperature measurements.
- according to IEC-60793-1-31 using a constant displacement of 30 mm/minute
- measured between 0°C and 70°C
- Temperature range is dependent on exposure time.