Dissertation
Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Amplification technology,the amplifier > Amplifier

Experimental Study of Electronic Radiation and Temperature on the Gain of Erbium-Doped Fiber Amplifier

Author WangChuanCai
Tutor MaJing
School Harbin Institute of Technology
Course Physical Electronics
Keywords Erbium-doped fiber amplifier Radiation effects Electron radiation Temperature
CLC TN722
Type Master's thesis
Year 2011
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The satellite communication technology is an important part of the modern communication technology plays an important role in the military civilian, but now with the increasing amount of information, the data transfer rate to continuously improve the communication band had to higher frequency bands to develop satellite optical communication technology more and more attention. Compared to satellite microwave communications technology, satellite optical communication technology has more advantages, such as the communication data rate higher modulation bandwidth greater communication equipment smaller, stronger anti-interference ability and confidentiality. Optical satellite communication system of the optical transmitter subsystem uses a semiconductor laser as the signal light source, consider the space of a very long distance optical communication transmission, a great space loss, which can not be implemented in the optical satellite communication link relay amplification, and thus requires the emission high-side output power, modulation rate, which makes the development of high-power optical transmitter has become a key technology in space optical communication. The optical amplifier can be used as a reference solution, compared to other optical amplifier such as a semiconductor optical amplifier, erbium-doped fiber amplifier has a high gain, low noise, etc., the optical fiber amplifier can certainly plays an important role in the optical satellite communication system. Space optical communication terminal is operating in outer space, the reliability and lifetime of the terminal will be the influence of the space environment, and the erbium-doped fiber amplifier (EDFA) as the key in the terminal optics will therefore subject to the environmental impact of these spaces. In this paper, using 980nm laser pumped EDFA for the study, the impact on EDFA gain a preliminary theoretical and experimental study of electron irradiation environment and temperature change environment. Firstly elaborated fiber optic devices in the space radiation environment adaptability Research and EDFA temperature characteristics Research, and then given the basic theory of EDFA, the last major experimental study of electron radiation and temperature on the 980 nm laser pumped EDFA gain, for further experimental study and on the basis of these studies, including two aspects: (1) the introduction of temperature factors in electron irradiation experiments investigated temperature erbium-doped fiber radiation loss; (2) study the temperature convergence EDFA gain recovery after irradiation. Experimental results show that: in the radiation experiments in high irradiation temperature can increase the EDFA damage threshold; radiation, low temperature can repair the the EDFA damage caused by radiation. These two aspects of research work on how to strengthen the the EDFA anti-radiation and how to repair radiation-induced damage to the EDFA provides a reference.

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