RIA: Composite Cavity Semiconductor Lasers for High Speed Communication

可调谐半导体激光器（SCL）是基于频率调谐和波分复用（WDM）技术的最先进的光波通信系统中的关键部件。在这些系统中，可调谐SCL用作光纤链路的光源。由于其独特的性能，它是能够有效地提供所需的高数据速率的信息在电信和计算机网络，有线电视，局域网等其他重要的应用可调谐SCL包括频域光存储器（FDOM），光泵浦掺铒光纤放大器和固态激光器，激光光谱，以及空间通信的直接来源。在本计画中，我们提出对一种新型的复合腔半导体雷射进行理论与实验研究，这种雷射是由多主动区段结构所组成。这种半导体激光器是近年来广泛研究和开发工作的主题1- 5、9、10，这是由它们改进的操作和更精细的特性驱动的。结果表明，该腔具有单纵模、高边模抑制比、高调制效率、宽调谐范围等优点，在耦合腔的情况下，还可获得高输出功率。然而，对许多这些结构的理解是不完整的，全面的设计标准尚未建立。在最近的一项研究中，我们概述了这些器件建模的基础，并将其用于两段增益可调分布反馈SCL的特定情况。迄今为止取得的初步结果以及其他研究都非常令人鼓舞3，5，8，并强调有必要获得更好的理解，以优化其操作。该研究计划预计将包括调制效率，光学线宽，调谐范围，场模式以及其他相关特性等参数的理论和实验研究。***

9308126 Griffel The tunable semiconductor laser (SCL) is a key component in the most advanced lightwave communication systems, which are based on frequency tuning and wavelength division multiplexing (WDM) techniques. In these systems, the tunable SCL is used as the light source for optical fiber links. Due to its unique properties it is capable of efficiently delivering the high data rate of information required in telecommunication and computer networks, CATV, LAN, etc. Other important applications for the tunable SCL include frequency domain optical memory (FDOM), optical pumping of Erbium doped fiber amplifiers and solid state lasers, laser spectroscopy, as well as direct source for space communication. In this project, we propose to carry out both theoretical and experimental studies of a new class of composite-cavity semiconductor lasers that consist of multi-active-section structures. Such semiconductor lasers have been the subject of extensive research and development effort in the recent years 1-5,9,10 , which was driven by their improved operation and finer characteristic. As a result, single longitudinal mode, higher side-mode suppression ratio, improved modulation efficiency, wider tuning range, and, in the case of coupled cavities, high output power were obtained. However understanding of many of these structures is incomplete, and comprehensive design criteria have not yet been established. In a recent study we have outlined the basis for modelling these devices, and used it for the specific case of two-section gain-levered distributed-feedback SCL. The preliminary results obtained so far, as well as other studies are extremely encouraging 3,5,8 and stress the necessity to acquire a better understanding to optimize their operation. The study program is projected to include the theoretical and experimental investigation of parameters such as modulation efficiency, optical linewidth, tuning range, field patterns, as well as other pertinent characteristics. ***