摘要: 在本文中,我们首先介绍了半导体激光器的发展历史以及发展趋势。接着又对增益曲线的重要性及其测量原理进行了详细介绍。结合实验,对激光器的自发发射谱的特性进行了研究。采用黑基-保利的测量方法,以自发发射的F-P谐振的极大值与极小值之比作为测量依据,得出了不同偏置电流下的增益曲线。半导体激光器的增益主要研究了增益曲线的以下特性:在阈值电流以下,随着电流的增加,增益曲线沿纵轴方向上移,峰值增益增大;并且,相同波长处,两个不同工作电流下的增益系数之差越来越小。对以上的几点我们都给出了理论的分析。 关键词:半导体激光器 增益曲线 Measurement of gain curves of semiconductor laser amplifiers Abstract: In this paper, we first introduce the history and future of the semiconductor lasers. Then the importance and principle of the measurement of the gain curves are demonstrated in detail. According to the experiment, the characteristics of the spontaneous emission spectra are analyzed. Using Hakki-Paoli’s method, and measure the ratio of the maximum and minimum value of the spontaneous emission of the F-P resonant cave, and gain curves of different bias current are obtained. And we mainly studied the following characteristics: When bellow the threshold, the curves shift upwards and the maximum value increase as the bias current rises; While the wavelength is the same, the difference of the gain coefficient between different bias current become smaller and smaller. For each characteristic we have explained theoretically. Keywords: semiconductor lasers gain curves |
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