Quantum Dot Laser Modeling****

光纤通信是迄今为止最有效的远距离信息交换技术，一旦信息可以作为光脉冲耦合到光纤上，光脉冲是可控的、稳定的、明亮的，并且在时间和波长上非常窄。许多不同波长的近距离光脉冲可以同时传输，如果它们都是要在接收器进行光谱解析的正确波长。这些波长是由标准预先定义的。微芯片上的固态激光器可以产生非常明亮的光束，其大小很容易与光纤耦合，但精确地将波长控制到标准波长是困难的，而且在整个标准波长范围内随意控制激光波长也是如此。幸运的是，纳米光子学在原则上提供了一种工具，使激光能够同时发射宽波长范围的光。此后，可以控制第二个设备(不是本方案的一部分)，以随意挑选所需的标准波长。量子点提供了设计激光带隙的能力，以支持宽波长范围内的激光。在渥太华大学，设计、建模和测试内置量子点的激光结构的专业知识已经很成熟。拟议的项目将把这种能力正式化为可移植的数值模型，在已建立的商业软件引擎上运行，并对照已知结构进行验证。

Optical fibre communications are by far the most effective technology for long-distance exchange of information, once that information can be coupled onto the fibre as light pulses which are controllable, stable, and bright, and very narrow in time and wavelength. Light pulses of many different closely-spaced wavelengths can be transmitted simultaneously, if they are all the right wavelengths to be spectrally resolved at the receiver. These wavelengths are pre-defined by standards. Solid-state lasers on microchips can produce very bright beams of a size readily coupled to optical fibre, but controlling the wavelength precisely to standard is difficult, and so is controlling the laser wavelength at will across the full range of standard wavelengths.****Fortunately, nanophotonics provides in principle a tool enabling the laser to emit light across a wide wavelength band simultaneously. Thereafter, a second device (not part of this proposal) can be controlled to pick out the desired standard wavelength at will. Quantum dots provide capability to engineer the laser bandgap to support lasing over a wide wavelength range. Expertise to design, model, and test laser structures with grown-in quantum dots is well established at uOttawa. The proposed project will formalize such capability into a portable numerical model, running on established commercial software engines, and verify it against known structures.** ******