Beijing Samyon Instruments Co., Ltd.
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Femto Fiber Bragg Grating Bear High Temperature Battery Management Wind Turbine
Specification:
The Laser is focused into the core of the fiber and induces local refractive index changes in a point-by-point writing process. The process is highly nonlinear and therefore basically independent of the fiber material, which means that doping the fiber (e.g. germanium) is not required. The FBGs can be written in radiation insensitive fibers and special pure core fibers for harsh environments. The gratings are type II gratings with temperature stability up to 1,000°C. As the process is applied through the coating, no stripping and recoating of the fiber is required. Furthermore, waveguides and FBGs can be written into the cladding of the fiber to achieve radially distributed arrays of FBGs for 3D shape sensing.
Application:
| Wind Turbine | Well and Pipeline |
| Monitoring Medical Technology | Industrial Process Control |
| Aerospace | Smart Structures |
| Power Plant Control | Oil Tank Temperature Monitor |
| Battery Management | Big Equipments Monitor |
| Engine Monitoring | Fir Alarm |
Feature:
HIGHLY VERSATILE APPLICATIONS. Along with special FBG for temperature, strain, pressure, vibration measurement, it is possible to provide long-range FBG arrays of several kilometers length with single FBG distances of only a few mm. Due to their high temperature stability and strength, fs-written FBGs can be used very effective in harsh and/or demanding environments.
Technical specification:
| Single FBG | FBG Array |
| Bragg wavelength 1460nm-1640nm (others on request) Wavelength tolerance <0.2 nm FWHM: 0.1nm to several nm Reflectivity: 10-4 to 99% Sideband suppression (apodized): up to 20dB FBG length: 0,06mm to 12mm Low polarization dependence option from 0-5pm Low scattering loss option of <0,2dB
| For spectrometer, scanning laser, tunable filter or AWG interrogation systems Typically, up to approx. 50 FBGs per array, depending on interrogation unit Each FBG with individual wavelength and reflectivity typically between 30% and 70% Narrow FBG spacing starting from 1mm possible For OTDR and OFDR interrogation systems Number of sensors typically in the range of several thousand FBGs per sensing cable Each FBG with similar wavelength and reflectivity typically between -45dB and -35dB Narrow FBG spacing starting from 1mm possible
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