Experimental Study Of Electronic Radiation And Temperature On The Gain Of Erbium-Doped Fiber Amplifier

Satellite communication technology is an important part in modern communication technology. It plays an important role both in the military and civilian, but now with the increasing amount of information, the requirements of data transmission rate has been improving, making the communication bands goes to the higher frequency. People change their research work from the satellite microwave communications to satellite optical communication. Comparing to satellite microwave communications, satellite optical communication technology has more advantages: the communications data rate is higher, the communications modulation bandwidth is wider, the device size is smaller, the confidentiality and anti-interference ability is enhanced.Satellite optical communication system using semiconductor laser optical transmitter subsystem as a signal source, considering the space optical communication transmission distance is very long and has much loss of space, the satellite communication relay amplification is difficult to achieve. To meet the large information transmission capacity, It requires much bigger in the transmitter output power, high modulation rate, so that the development of high-power optical transmitter has become a key technology in the space optical communication technology. The using of optical amplifiers can be considered as a solution, comparing to other optical amplifiers such as semiconductor optical amplifiers, erbium-doped fiber amplifier with high gain and low noise. It is sure that optical fiber amplifier will play an important role in satellite optical communication system.Due to space optical communications terminal work in outer space, the reliability and life of the terminal will be affected by the space environment, erbium-doped fiber amplifier (EDFA) as the key optical components in the terminal is bound to be affected by space environment . In this paper, using 980nm laser pumped EDFA as the research object to research the effect of electronic radiation and temperature change environment to the EDFA gain. Papers described the adaptability of Research of the optical devices in space radiation environment and temperature change environment firstly, then gace the basic theory of EDFA. The last major work is the experimental study of electronic radiation and temperature on the 980nm pumped EDFA gain, on the basis of these experimental study, we carried out two main experimental research work: (1) Considering the electronic temperature factors in radiation experiments, we researched the effect of temperature to the erbium-doped fiber radiation loss; (2) We researched the effect of temperature on the irradiated EDFA gain. The results show that: in the radiation experiments, the high irradiation temperature can increase the damage threshold of EDFA; After radiation, low temperatures can repair the damage of EDFA caused by radiation. These two research work on how to enhance EDFA radiation and how to repair the damage of EDFA caused by radiation provides a reference.