Instabilities and Noise in Semiconductor Lasers

半导体激光器的相干特性决定了 它们在光通信信道、计算 和存储。 在提高这些限制之前， 需要理解激光不稳定性和噪声。 通过新颖 统计实验和理论计算，我们建议， 发现稳定激光器和噪声发展的新原理 通过几何重新配置、材料处理来减少 性质，以及电子反馈技术的应用。 我们 将探讨操作参数和激光之间的相关性 响应时间从几秒到皮秒不等。 我们将研究 (i)反射引起的不稳定性，（ii）模式划分噪声和 跳模，（iii）线宽（与功率相关和无关） 和动力学的孤立和外腔半导体激光器， (iv)低频1/f噪声 量子态的产生， 将研究半导体激光器的亚泊松统计。 确定性混沌和量子噪声在反射中的作用 将用非常快速的瞬态数字转换器来研究不稳定性。 我们 期望开发出构建稳定激光器的设计策略。 蒙特卡罗模拟将用于测试关于起源的假设 激光不稳定性的研究 的 由此开发的激光器可用于信息处理， 泵浦固态激光器和精密测量。

The coherence properties of semiconductor lasers determine the limits of their application in optical communication channels, computation and storage. Before these limits can be enhanced, the sources of laser instability and noise need to be understood. Through novel statistical experiments and theoretical calculations, we propose to discover new principles for the development of stable lasers and noise reduction by geometric reconfiguration, manipulation of material properties, and the application of electronic feedback techniques. We will probe correlations between operating parameters and laser response over time scales from seconds to picoseconds. We will study (i) reflection induced instabilities, (ii) mode partition noise and mode-hopping, (iii) the linewidth (power dependent and independent) and dynamics of solitary and external cavity semiconductor lasers and (iv) low frequency 1/f noise. The generation of quantum states with sub-Poissonian statistics by semiconductor lasers will be examined. The role of deterministic chaos and quantum noise in reflection instabilities will be studied with very fast transient digitizers. We expect to develop design strategies for constructing stable lasers. Monte Carlo simulations will be used to test hypotheses on the origins of laser instabilities in conjunction with the experiments. The lasers thus developed could be used for information processing, pumping solid state lasers and for precision measurements.