Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China.
College of Sino-German Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China.
Sensors (Basel). 2018 Jul 11;18(7):2236. doi: 10.3390/s18072236.
The radiation effects of three Er-doped superfluorescent fiber sources (SFSs), which are based on three segments of Er-doped fibers with different lengths, are studied experimentally. We observed that the radiation-induced attenuation of the signal light of the 1530 nm band for an SFS is less than that of the 1560 nm band. Thus, the trimming technique of the Gauss-like spectra is investigated to reduce the mean wavelength drift. A filter was customized and used in superfluorescent fiber sources. To further reduce output power loss, the method with feedback control of pump power was adopted in the SFS. Then, the trimming spectral SFS with pump feedback control was tested under irradiation environment at the dose rate of 2.988 Gy/h. The experimental results demonstrate that the mean wavelength drift is <40 ppm and the loss of output power is <0.2 dB under a total dose higher than 1000 Gy. These findings confirm the significance of the method in improving radiation-resistant capabilities of fiber sources under irradiation environments.
实验研究了三种掺铒超荧光光纤光源（SFS）的辐射效应，这三种 SFS 基于具有不同长度的三段掺铒光纤。我们观察到，SFS 中 1530nm 波段信号光的辐射诱导衰减小于 1560nm 波段。因此，研究了高斯谱整形技术来降低平均波长漂移。定制了一个滤波器并应用于超荧光光纤光源中。为了进一步降低输出功率损耗，在 SFS 中采用了泵浦功率反馈控制的方法。然后，在剂量率为 2.988Gy/h 的辐照环境下对具有泵浦反馈控制的光谱整形 SFS 进行了测试。实验结果表明，在总剂量高于 1000Gy 的情况下，平均波长漂移小于 40ppm，输出功率损耗小于 0.2dB。这些发现证实了该方法在提高辐照环境下光纤光源的抗辐射能力方面的重要意义。
