空间辐射环境对半导体激光器的影响

电子辐射是空间辐射环境的重要组成部分, 也是地面模拟空间辐射环境的重要手段。为了研究半导体激光器在空间辐射环境下应用的可行性, 通过电子加速器的电子辐照模拟空间辐射环境, 以研究半导体激光器总剂量效应。实验结果表明, 半导体激光器的阈值电流随着辐照剂量的加大而增加, 斜率效率在106 rad之前随着辐射剂量的加大而略有增大。退火观测期间, 阈值电流在最初的两周内震荡变化, 总体趋势为增加, 直到两周后趋于稳定。对于接受辐射剂量较低的半导体激光器, 在实际使用中可以采用电流补偿的方法来消除辐射对其阈值及斜率产生的影响。

Impact of Space Radiation to Semiconductor Laser

The electron irradiation is the main part of space radiation and also the main means that we simulate space radiative environment .To study the feasibility of semiconductor lasers used in radiative environment of space, this paper studies the total dose effects through electron accelerator simulating the radiative environment of space. The result shows that as the radiation dose increases, the threshold current decreases as the dose increases and the slop efficiency increases gradually before 106 rad . During the annealing process, threshold current fluctuates in the first two weeks but the overall trend is increases and after that it tends to be stable. To the semiconductor lasers which are radiated in the relatively low dose, the radiative effects on the threshold current and slop efficiency can be eliminated through the method of current compensation.