Highly Germanium Doped Fiber
For the fabrication of bend insensitive Fiber Bragg Grating (FBG) arrays,Fibercore offer three, high Germania fibers, SM1500(4.2/125), SM1500(4.2/80)and SM1500(4.2/50). These fibers have cores with more than 5X the Germaniacontent of a telecoms fiber, enabling FBGs to be written with or withoutHydrogen loading.
The high Numerical Aperture (NA) of these fibersgives exceptional resistance to bend-induced loss. Optional ‘low-profile’ 80μmor 50mm cladding diameters are available along with increased proof test levelsmake these fibers ideal for high reliability, coiled and tightly packagedapplications, including fiber optic hydrophones and geophones.
Special coating variants are available onrequest for the ‘Cold Writing’ technique where FBGs are inscribed through thecoating, without the need to remove the coating.
Advantages:
• High NA variants for extremely low macro and micro bend losses
• Reduced cladding options for high reliability coils and reduced packagevolume
• Highly photosensitive core design for high reflectivity
• FBGs
Typicalapplications:
• Temperature Sensors
• Strain Sensors
• Biomedical sensors
• Hydrophones
• Geophones
• FBGs
RelatedProducts:
• SM Fiber for Visible Through to Near IR (SM)
• High Temperature Acrylate Coated Fiber (SM-HT)
• Polyimide Coated SM Fiber (SM-P)
• Pure Silica Core SM Fiber (SM-SC)
ProductVariants:
• SM1500(4.2/125) Highly photosensitive and bend insensitivefiber for FBGs around 1550nm
• SM1500(4.2/80) Reduced cladding highly photosensitive fiber for FBGs inembedded sensors and coiled applications
• SM1500(4.2/50) Reduced cladding highly photosensitive fiber for FBGs inembedded sensors and very tightly coiled applications
• SM1500(4.2/125)P Polyimide coated highly photosensitive and bend insensitivefiber for FBGs around 1550nm
• SM1500(4.2/50)P Polyimide coated reduced cladding highly photosensitive fiberfor FBGs in embedded sensors and very tightly coiled applications
Specifications
| SM1500(4.2/125) | SM1500(4.2/80) | SM1500(4.2/50) |
Operating Wavelength (nm) | 1550 |
Cut-Off Wavelength (nm) | 1350 – 1500 |
Numerical Aperture | 0.29 – 0.31 |
Mode Field Diameter (μm) | 4.0 – 4.5 @1550nm |
Attenuation (dB/km) | ≤1.5 @1550nm | ≤2.0 @1550nm |
Proof Test (%) | 1, 2 or 3 (100, 200 or 300 kpsi) |
Cladding Diameter (μm) | 125 ± 1 | 80 ± 1 | 50 ± 1 |
Core Cladding Concentricity (mm) | ≤0.5 |
Coating Diameter (μm) | 245 ± 15 | 170 ± 10 | 110 ± 6 |
Coating Type | Dual Acrylate (Single by Special Order) | Single Acrylate |
