Radiation-induced attenuation self-compensating effect in super-fluorescent fiber source

doi:10.1088/1674-1056/23/9/094213

Abstract The compact super-fluorescent fiber source (SFS) output spectra variations at different pump currents and under different dose of gamma-ray radiation were measured and compared respectively. The radiation-induced attenuation (RIA) self-compensating effect in SFS based on photo-bleaching was found and the general mathematic model of SFS output spectra variations was made. The radiation-induced background attenuation (RIBA) at the pump wavelength was identified to be the main cause of the total output power and spectra variations and the variations can then be compensated by active control of the pump power to enhance the self-compensating effect. With closed-loop feedback control of pump current, double-pass backward (DPB) configuration and spectrum re-shaping technology, an SFS prototype was made and tested. The mean-wavelength stability of about 87.4 ppm and output power instability of less than 5% were achieved under up to 200 krad (Si) gamma-ray irradiation.

Keywords: super-fluorescent fiber source Er-doped fiber radiation-induced attenuation mean wavelength stability

Received: 13 March 2014
Revised: 16 June 2014
Accepted manuscript online:

PACS:	42.88.+h	(Environmental and radiation effects on optical elements, devices, and systems)
	42.81.Wg	(Other fiber-optical devices)
	42.81.Pa	(Sensors, gyros)

Fund: Project supported by the Special Fund for Development of National Major Scientific Instruments of China (Grant No. 2013YQ04081504) and the Program for Innovative Research Team in University, China (Grant No. IRT 1203).

Corresponding Authors: Yang Yuan-Hong
E-mail: yhyang@buaa.edu.cn

Cite this article:

Yang Yuan-Hong (杨远洪), Suo Xin-Xin (索鑫鑫), Yang Wei (杨巍) Radiation-induced attenuation self-compensating effect in super-fluorescent fiber source 2014 Chin. Phys. B 23 094213

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Radiation-induced attenuation self-compensating effect in super-fluorescent fiber source

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