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Sensors 2018, 18(7), 2236; https://doi.org/10.3390/s18072236

Radiation-Resistant Er3+-Doped Superfluorescent Fiber Sources

1
Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
2
College of Sino-German Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
3
Shenzhen Key Laboratory of Laser Engineering, Guangdong Provincial Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
4
College of Information Engineering, Shenzhen University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Received: 17 May 2018 / Revised: 5 July 2018 / Accepted: 10 July 2018 / Published: 11 July 2018
(This article belongs to the Special Issue Sensors and Materials for Harsh Environments)
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Abstract

The radiation effects of three Er3+-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. View Full-Text
Keywords: fiber optic sources and detectors; radiation; superfluorescence; radiation-resistant technique fiber optic sources and detectors; radiation; superfluorescence; radiation-resistant technique
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liu, C.; Wu, X.; Zhu, J.; He, N.; Li, Z.; Zhang, G.; Zhang, L.; Ruan, S. Radiation-Resistant Er3+-Doped Superfluorescent Fiber Sources. Sensors 2018, 18, 2236.

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