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Sensors 2018, 18(7), 2236;

Radiation-Resistant Er3+-Doped Superfluorescent Fiber Sources

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
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
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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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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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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