Posted in | Optical Sensors

Low Bend Loss Fiber – 1550-125

The Low Bend Loss fiber LBL-1550-125 from FBGS has a cladding diameter of 125 µm and is enhanced for operation in the 1550 nm wavelength range. The glass composition has been tweaked such that the fiber upholds a good signal transmission under small bending diameters.

Parameter DTG-A3
Reflectivity (for grating length of 8 mm) >15%
FWHM (for grating length of 8 mm) 100 pm
Center wavelength (extended range upon request) 1510 nm to 1590 nm 1460 to 1620 nm
Absolute Wavelength accuracy1 ≤ 0.5 nm ≤ 0.8 nm
Relative Wavelength accuracy ≤ 0.3 nm ≤ 0.5 nm
Side Lobe Suppression (SLS) ≥ 10 dB (typical) ≥ 10 dB (typical)
DIG® length 1 to 10 mm / 8 mm (typical)
Attenuation <8.6 dB/km
Mode Field Diameter (MFD) @ 1550 nm 6 µm (typical)
Numerical Aperture (NA) 0.26 (typical)
Cladding diameter 125 µm ± 1 µm
Coating type2 ORMOCER/ORMOCER®-T / One layer Acrylate
Coated fiber diameter 195 µm (typical)
Tensile load at break3 > 50 N (corresponds to >5% strain)
Temperature sensitivity4 (formula: Δλ/(λ x ΔT)) 6.5 L-1 x 10-6 (typical)
Strain sensitivity1 (formula: Δλ/(λ x Δε) 7.8 µε-1 x 10-7 (typical)
Operational temperature ranges5 -200 °C to 200 °C for ORMOCER
-20 °C to 200 °C for ORMOCER®-T
-20 °C to 90 °C for One layer Acrylate

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