Transient and Steady State Radiation Responses of Solarization-Resistant Optical Fibers

We investigated the responses of several solarization-resistant (SR) multimode optical fibers to high dose-rate (> 100 Mrad/s), low dose-rate (5 krad/s) X-rays and very low dose-rate (0.3 rad/s) 1 MeV γ-rays. We characterized the radiation-induced attenuation (RIA) and radiation-induced emission (RIE) phenomena in the spectral range 200-1100 nm. These commercial fibers, optimized for the transport of high power of ultraviolet (UV) light, present good radiation tolerance to transient and steady state environments compared to other classes of multimode optical fibers with pure or doped cores (Ge, P, F). The different tested SR fibers present similar behaviors for both gamma-rays and X-rays. These fibers present low transient and permanent RIA levels for wavelengths greater than 300 nm. Our results showed that RIE can become an important factor of the fiber degradation, especially for high dose-rate irradiation. The induced losses in these fibers can be explained by the generation of Si-related defects like the SiE', Si-NBOHCs or STHs and also to chlorine-related centers like Cl0.

[1]  S. Girard,et al.  Radiation-induced defects in fluorine-doped silica-based optical fibers: Influence of a pre-loading with H2 , 2009 .

[2]  Stephen A. Payne,et al.  Induced optical absorption in gamma, neutron and ultraviolet irradiated fused quartz and silica , 1997 .

[3]  H. Hosono,et al.  Intrinsic defect formation in amorphous SiO2 by electronic excitation : Bond dissociation versus Frenkel mechanisms , 2008 .

[4]  Kenneth T. V. Grattan,et al.  UV-stabilized silica-based fibre for applications around 200 nm wavelength , 1997 .

[5]  J. Baggio,et al.  Radiation Effects on Silica-Based Preforms and Optical Fibers—I: Experimental Study With Canonical Samples , 2008, IEEE Transactions on Nuclear Science.

[6]  H. Hosono,et al.  Formation of Intrinsic Point Defects in Fluorine-doped Synthetic SiO2 Glass by 60Co γ-ray Irradiation , 2007 .

[7]  D. Griscom.  Optical Absorption of Cl2− Hole‐Type Centers in Irradiated Alkali Halide–Alkali Borate Glasses , 1969 .

[8]  J. Leray,et al.  Vulnerability analysis of optical fibers for laser megajoule facility: preliminary studies , 2005, IEEE Transactions on Nuclear Science.

[9]  Dan Sporea,et al.  Study of color centers in optical fibers to be used for ITER plasma diagnostics , 2007, ROMOPTO International Conference on Micro- to Nano- Photonics.

[10]  Kazuya Saito,et al.  Fictive-temperature-dependence of photoinduced self-trapped holes in a-SiO 2 , 2003 .

[11]  H. Hosono,et al.  Co60γ-ray-induced intrinsic defect processes in fluorine-doped synthetic SiO2 glasses of different fluorine concentrations , 2009 .

[12]  Karl-Friedrich Klein,et al.  Stability and lifetime improvements of UV fibers for new applications , 1998, Photonics West - Biomedical Optics.

[13]  Karl-Friedrich Klein,et al.  UV fibers for applications below 200 nm , 2001, SPIE BiOS.

[14]  J. Baggio,et al.  Spectroscopic Study of $\gamma$ -Ray and Pulsed X-Ray Radiation-Induced Point Defects in Pure-Silica-Core Optical Fibers , 2007, IEEE Transactions on Nuclear Science.

[15]  L. Skuja,et al.  OPTICAL PROPERTIES OF DEFECTS IN SILICA , 2000 .

[16]  M Decreton,et al.  Diagnostic components in harsh radiation environments: possible overlap in R&D requirements of inertial confinement and magnetic fusion systems. , 2008, The Review of scientific instruments.

[17]  Hosono,et al.  Oxygen-related intrinsic defects in glassy SiO2: interstitial ozone molecules , 2000, Physical review letters.

[18]  J. Baggio,et al.  Transient optical absorption in pulsed-X-ray-irradiated pure-silica-core optical fibers: Influence of self-trapped holes , 2006 .

[19]  David L. Griscom,et al.  Self-trapped holes in pure-silica glass: A history of their discovery and characterization and an example of their critical significance to industry , 2006 .

[20]  Y. Sasajima,et al.  Optical transitions of self-trapped holes in amorphousSiO2 , 2003 .