Li Vecchi Gaetano, Di Francesca Diego, Kadi Yacine, Ricci Daniel, Brugger Markus, Campanella Cosimo, Alessi Antonino, Ouerdane Youcef, Girard Sylvain
Opt Lett. 2020 Sep 15;45(18):5201-5204. doi: 10.1364/OL.402382.
We demonstrate the feasibility of resetting and reusing dosimeters exploiting the measurement of the infrared radiation-induced attenuation (IR-RIA) in phosphosilicate optical fibers (OFs) to provide point or distributed dose measurements in radiation environments. To bleach the room temperature stable IR-RIA, we used the photobleaching (PB) phenomenon. The PB efficiency was evaluated for different wavelengths in the [400-1100] nm range. The best identified PB resetting condition consists in using a continuous-wave Argon-ion laser at 514 nm. This treatment successfully bleached ∼97 of the IR-RIA at 1550 nm of a 30 m-long P-doped single mode optical fiber X-ray irradiated at a dose of 100 Gy. Successive re-irradiations of the same OF sample, regenerated after each run, confirm that the dosimeter keeps the same calibration curve during the whole process.
我们展示了利用磷硅酸盐光纤（OF）中红外辐射诱导衰减（IR-RIA）的测量来重置和重复使用剂量计的可行性，以便在辐射环境中提供点剂量或分布式剂量测量。为了漂白室温稳定的IR-RIA，我们使用了光漂白（PB）现象。评估了[400-1100]nm范围内不同波长的PB效率。最佳确定的PB重置条件是使用波长为514nm的连续波氩离子激光。这种处理成功地漂白了一根30m长的P掺杂单模光纤在100Gy剂量的X射线照射下1550nm处约97%的IR-RIA。对每次运行后再生的同一OF样品进行连续再辐照，证实剂量计在整个过程中保持相同的校准曲线。
