ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Effect of radiation-induced mean wavelength shift in optical fibers on the scale factor of interferometric fiber optic gyroscope at a wavelength of 1300 nm |
Jin Jing (金靖), Wang Xue-Qin (王学勤), Lin Song (林松), Song Ning-Fang (宋凝芳) |
School of Instrument Science and Optic-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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Abstract In order to analyze the effect of wavelength-dependent radiation-induced attenuation (RIA) on the mean transmission wavelength in optical fiber and the scale factor of interferometric fiber optic gyroscopes (IFOGs), three types of polarization-maintaining (PM) fibers is tested by using a 60Co γ -radiation source. The observed different mean wavelength shift (MWS) behaviors for different fibers are interpreted by color-center theory involving dose rate-dependent absorption bands in ultraviolet and visible range and total dose-dependent near infrared absorption bands. To evaluate the mean wavelength variation in fiber coil and the induced scale factor change for space-borne IFOG under low radiation dose in space environment, the influence of dose rate on the mean wavelength is investigated by testing four germanium (Ge) doped fibers and two germanium-phosphorus (Ge-P) codoped fibers irradiated at different dose rates. Experimental results indicate that the Ge-doped fibers show the least mean wavelength shift during irradiation and their mean wavelength of optical signal transmitting in fibers will shift to shorter wavelength in low-dose-rate radiation environment. Finally, the change in the scale factor of IFOG resulting from the mean wavelength shift is estimated and tested, and it is found that the significant radiation-induced scale factor variation must be considered during the design of space-borne IFOG.
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Received: 25 December 2011
Revised: 06 April 2012
Accepted manuscript online:
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PACS:
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42.81.-i
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(Fiber optics)
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42.88.+h
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(Environmental and radiation effects on optical elements, devices, and systems)
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42.25.Hz
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(Interference)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61007040). |
Corresponding Authors:
Jin Jing
E-mail: jinjing@buaa.edu.cn
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Cite this article:
Jin Jing (金靖), Wang Xue-Qin (王学勤), Lin Song (林松), Song Ning-Fang (宋凝芳) Effect of radiation-induced mean wavelength shift in optical fibers on the scale factor of interferometric fiber optic gyroscope at a wavelength of 1300 nm 2012 Chin. Phys. B 21 094220
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