RIA: Composite Cavity Semiconductor Lasers for High Speed Communication

9308126格里菲尔可调谐半导体激光器是基于频率调谐和波分复用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被用作光纤链路的光源。由于其独特的特性，它能够有效地传输电信和计算机网络、CATV、局域网等所需的高数据速率信息。可调谐SCL的其他重要应用包括频域光学存储器(FDOM)、掺铒光纤放大器和固态激光器的光泵浦、激光光谱分析以及空间通信的直接源。在这个项目中，我们计划对一类新型的由多有源段结构组成的复合腔半导体激光器进行理论和实验研究。这类半导体激光器在最近几年中一直是广泛研究和开发的对象1-5，9，10，这是因为它们改进了操作和更好的特性。结果表明，该激光器具有单纵模、更高的边模抑制比、更高的调制效率、更宽的调谐范围，以及在耦合腔情况下的高输出功率。然而，对这些结构中的许多结构的了解还不完整，还没有建立全面的设计标准。在最近的一项研究中，我们概述了为这些器件建模的基础，并将其用于两段式增益杠杆分布式反馈SCL的具体情况。迄今为止取得的初步结果以及其他研究报告都非常令人鼓舞，3、5、8强调有必要更好地了解这些问题，以优化其运作。该研究计划将包括对调制效率、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. ***