Broadband Fiber Bragg Grating Arrays
Sentek’s broadband fiber grating (FBG) array contains as many as thousands of specially designed FBGs. Unlike traditional FBGs, our gratings are broadband up to 100nm and extremely stable for all operating conditions including ultrahigh temperatures. The gratings can be fabricated in any fiber that may have different core materials and any polymer coatings. These fibers include but are not limited to germanium-doped or pure-silica-core with any polymer coating such as acrylate, high-temperature acrylate and polyimide. Our unique computer-controlled manufacturing system permits our customers to design their own grating arrays with any grating reflectance distribution and arbitrary grating spacing.
Key Features
- Multiple fiber coating choices
- Broadband >100nm
- Grating-to-grating uniformity
- Grating spacing control
- Excellent high temperature stability
Typical Applications
- DAS sensitivity boost
- In-line fiber devices
Technical Specifications
Details
| FBG Reflecting Strength | -40 to -55dB |
| 3dB Bandwidth | >20nm |
| Grating Spacing | 1 to 50m or custom |
| Grating Spacing Precision | ±2mm or 0.2% of spacing, whichever gives greater uncertainty |
| Grating Reflectance Distribution | Uniform reflectance or uniform reflected power |
| Standard Deviation of Reflected Powers | 0.5dB typical |
| Fiber Types | Pure silica core fiber, telecom fiber such as SMF-28 |
| Fiber Coatings | Standard and high-temperature acrylate |
| Grating Zone Partition Options | Any |
| Maximum Fiber Length | 10km, actual max length dependent on grating quantity and reflectance |
