Effect of the Fiber Coating on the Radiation Sensitivity of Type I FBGs
- Resource Type
- Periodical
- Authors
- Gusarov, A.; Chojetzki, C.; Mckenzie, I.; Thienpont, H.; Berghmans, F.
- Source
- IEEE Photonics Technology Letters IEEE Photon. Technol. Lett. Photonics Technology Letters, IEEE. 20(21):1802-1804 Nov, 2008
- Subject
- Engineered Materials, Dielectrics and Plasmas
Photonics and Electrooptics
Coatings
Fiber gratings
Bragg gratings
Optical fibers
Polyimides
Optical fiber testing
Poles and towers
Ionizing radiation
Space technology
Temperature
Fiber Bragg gratings (FBGs)
optical fiber radiation effects
- Language
- ISSN
- 1041-1135
1941-0174
We have studied the influence of the fiber coating on the radiation sensitivity of fiber Bragg gratings (FBGs). These FBGs are draw tower gratings written before applying the coating in a fiber with a photosensitive 18-mol.% GeO$_{2}$-doped core. Using a Co$^{60}$ source we irradiated polyimide, acrylate, and ormocer coated gratings as well as mechanically stripped ormocer coated FBGs up to a 40-kGy dose. This total dose level corresponds to a near-earth space radiation environment mission. We show that the coating type must be taken into account for correctly interpreting ionizing radiation effects on FBGs.