Fiber Bragg Grating (FBG)
- High mechanical strength FBGs
- Hydrogen darkening resistant variants
- Radiation-induced attenuation resistant variants
- UV photodarkening resistant variants
- Flexible spectral characteristics
Typical Applications:
- Temperature sensing
- Strain sensing
- Hydrophone and geophone acoustic sensing
- Laser wavelength locking
- Wavelength division multiplexing
Fibercore provides Fiber Bragg Gratings (FBG’s) using targeted techniques on a variety of fibers with different optical coatings to meet the myriad of applications that exist with FBG’s. FBG’s are used for strain sensing, temperature sensing, acoustic sensing, accelerometers, chemical sensing, humidity sensing, and many others as well. Fibercore’s expertise is lining up the right technology of FBG with our specialized optical fibers to provide the optimum performance for the attribute of interest. Contact Fibercore for further information.
Comparison
| | Femtosecond FBG | UV Written FBG |
|---|---|---|
| Central Wavelength (nm) | 790–8501500–1600 | 970–1620 |
| Wavelength Tolerance (nm) | ±0.3nm (standard)±0.1 (optional) | ±0.5 (standard)±0.25 (optional) |
| Reflectivity (%) | <1–>80 | 1–99 |
| FWHM Bandwidth (nm) | 0.3–1 | 0.1–3 |
| FBG Length (mm) | ≤150 | 1–25 |
| FBG Profile | Uniform or Apodized | Uniform or Apodized |
| Chirp | No | Not chirped (standard)Chirped (optional) |
| FBG Arrays | Optional | Optional |
| Fiber Type | SM, MM | SM, PM |
| Fiber Cladding Diameters (μm) | 125, 80 | 125, 80, 60, 50 |
| Fiber Core Composition | Germanium DopedPure Silica | Germanium Doped |
| Please note: Each parameter is inherently linked, therefore not all values are independently achievable. |
Specifications
Product Variants Explained
| UV Written FBG | FBG written with a UV laser. |
| Femtosecond FBG | High reliability FBG written with a femtosecond laser. |
Product Specifications
| Central Wavelength (nm) | 970 - 1620 |
|---|---|
| Wavelength Tolerance (nm) | ±0.5 (standard) ±0.25 (optional) |
| Reflectivity (%) | 1 - 99 |
| FWHM Bandwidth (nm) | 0.1 - 3 |
| FBG Length (mm) | 1 - 25 |
| FBG Profile | Uniformed or Apodized |
| Chirp | Not chirped (standard) Chirped (optional) |
| FBG Arrays | Optional |
| Fiber Type | SM, PM |
| Fiber Cladding Diameters (μm) | 125, 80, 60, 50 |
| Fiber Core Composition | Germanium Doped |
Resources
Technical Bulletins File fiber_bragg_gratings_md54.6.pdf