Gamma ray radiation induced visible light absorption in P-doped silica fibers at low dose levels

Radiation response behavior of high phosphorous doped step-index multimode optical fibers under low dose gamma irradiation

“…The radiation response behavior of such type of high phosphorous doped optical fibers containing 14 and 16 mol% P 2 O 5 mentioned in the results part can be explained based on the formation of P-related defect centers as well as their effects on the dose rates of radiation source. The wavelength region of two broad radiation induced absorption bands observed in 400-420 nm and 500-560 nm wavelength becomes different than that of the earlier published results [21,27]. Such radiation induced absorption in P 2 O 5 doped SiO 2 glass fiber was developed due to phosphorous oxygen hole defect center (POHC) [27] which becomes a defect of the PO 2À 4 type.…”

“…It is well known that the radiation sensitivity of silica-based optical fiber depends on fiber and radiation parameters. However such study is essential as the doping levels, radiation parameter and nature of the glass becomes very much different than that of the earlier published data of P 2 O 5 doped fibers [20][21][22][23]. The radiation induced absorption spectra of two different Pdoped SIMM fibers (FP3 and FP5) and one standard Ge doped SIMM fiber (FP1) irradiated at two different dose rates are given in Figs.…”

“…In the last decade, extreme research work has been carried out to study the radiation effect on optical fibers to use them as the information transmission system in which require radiation resistance [10][11][12] behavior and to explore their possibility for use as radiation sensor [13][14][15][16][17][18][19] under various radiation environments such as nuclear waste tanks, nuclear reactors, etc., in which require radiation softness behavior. The radiation effects on P-doped [17,20,21] silica bulk materials and fibers have been reported. In the earlier some work on radiation sensitivity of P-doped fiber has been done at high dose rates 6-60 Gy/h practically for use in fiber optic dosimeter regarding medical application such as cancer treatments [21,22].…”

“…The radiation effects on P-doped [17,20,21] silica bulk materials and fibers have been reported. In the earlier some work on radiation sensitivity of P-doped fiber has been done at high dose rates 6-60 Gy/h practically for use in fiber optic dosimeter regarding medical application such as cancer treatments [21,22]. Recently Regnier et al have reported the data of low dose radiation induced attenuation at infrared wavelengths for P-doped SM fiber [23].…”

Arc-Induced Long Period Gratings from Standard to Polarization-Maintaining and Photonic Crystal Fibers

“…Extensive studies have been reported in [ 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 ], concerning the radiation effects on commercially available silica-based optical fibers and unconventional ones doped with cerium, aluminum, erbium, fluorine, nitrogen, and phosphorus. In particular, the high radiation sensitivity of P-doped fibers, with respect to standard Ge-doped fibers, makes them suitable for radiation dosimetry [ 74 , 75 , 76 ]. On the contrary, pure-silica core fibers have been proven to show very low radiation sensitivity and thus the devices written in these fibers have been studied for applications in ionizing radiation environments [ 62 , 67 , 77 ].…”