Tunable Fiber Laser Materials

有一个重要的需求，紧凑，轻便，高效的激光系统是可调的。为了使这些激光系统达到光束质量和所需的小尺寸和重量，它们必须是固态系统。对于这些系统来说，最有效的泵浦源是二极管激光器，其效率可能达到50%。为了有效地将泵浦光耦合到激光器中，并有效地提取产生的任何热量，光纤激光器将是最具吸引力的。LaserGenics公司拥有斯坦福大学持有的激光加热基座生长技术专利的独家授权，我们将应用于钛掺杂A1203， YA103和MgA1204的单晶光纤的生长。这些材料作为可调谐激光源非常有吸引力。在我们提出的计划过程中，我们将研究成分、温度、大气和拉速对生长的影响。我们还将研究这些纤维的退火程序，以将钛还原到+3价态。在第二阶段的工作中，我们将进一步优化这些光纤的生长，并基于我们已经生长的单晶光纤构建可调谐光纤激光面包板。

There is an important need for compact, lightweight, efficient laser systems that are tunable. In order for these laser systems to achieve the beam quality and the small size and weight required, they must be solid state systems. The most efficient source for pumping these systems is the diode laser where 50% efficiencies are possible. In-5+ order to efficiently couple the pump light into the laser and to efficiently extract any heat generated, a fiber laser would be the most attractive. LaserGenics Corp. has the exclusive license to the patents held by Stanford University on the laser-heated pedestal- growth technique that we will apply to the growth of single crystal fibers of titanium doped A1203, YA103, and MgA1204. These materials are very attractive as tunable laser sources. During the course of our proposed program we will study the effects of composition, temperature, atmosphere, and pull-rate on the growth. We will also study annealing procedures on these fibers to reduce the titanium to the +3 valence state. During the Phase II effort we will further optimize the growth of these fibers and construct a tunable fiber laser breadboard based on the single crystal fibers we have grown.