Custom FBG Array Fabrication Through Any Polymer Coating of Optical Fiber With Any Core Material
Sentek Instrument has developed a breakthrough in manufacturing ultrahigh-quality broadband FBGs in any fiber, including pure silica core fiber with various coating options. The quality of each FBG is continuously monitored during fabrication to ensure uniform optical power reflection within tight tolerances. Precise control over fiber and upstream grating loss compensation is maintained at an individual grating level. Customers can request broadband reflectance-weighted gratings with either constant or varying spacing. Moreover, a fiber can incorporate multiple grating zones, each containing numerous FBGs, and these zones can be arranged according to the customer’s requirements.
Key Advantages of Sentek FBG Technology
- Significant sensitivity enhancement
- Suppression of random sensitivity fluctuations across fiber segments and over time
- Large bandwidth
- Customer-specified varying grating reflectivities with individual grating tailorability and their distributions along the fiber
- Minimum polarization dependence
- Excellent thermal stability
- Precision grating spacing control
Ideal For
- DAS sensitivity boost
- In-line fiber devices
Technical Specifications
Details
| FBG Reflecting Strength | -40 to -55dB |
| 3dB Bandwidth | >20nm |
| Grating Spacing | 1m 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, polyimide |
| Grating Zone Partition Options | Any |
| Maximum Fiber Length | 10km, actual max length dependent on grating quantity and reflectance |
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