REG: High-Resolution Spectral-and Near-Field-Measurement System

9411713 Botez威斯康星大学麦迪逊分校的电气工程系将购买高分辨率光谱和激光近场测量设备，用于研究。该设备将用于几个研究项目，包括特别是高功率，单频锁相二极管激光阵列的发展。锁相二极管激光阵列显示出很高的衍射极限功率：1-1.5W。然而，这些设备没有单频输出，这阻碍了它们在许多应用中的使用。此外，目前它们的元素数量被限制在20个，这反过来又限制了相干功率的数量。提出的研究包括开发具有分布式反馈的锁相反制导阵列，以及实现创建40-80元单空间模式阵列的新概念。目标是：单频，衍射限制波束操作到1W，线宽50kHz，空间相干功率为3W。所要求的经费用于购买一台配备CCD照相机的高分辨率光栅光谱仪和一台用于阵列模式光谱近场成像的振动镜。这将有助于研究新型器件的模态结构，并对大功率单模工作进行优化。＊＊＊

9411713 Botez The Department of Electrical Engineering at the University of Wisconsin, Madison, will purchase high resolution spectral- and laser near-field measurement equipment, which will be dedicated to research. The equipment will be used for several research projects including in particular the development of high-power, single- frequency phase-locked diode-laser arrays. Phase-locked diode-laser arrays have demonstrated high diffraction- limited powers: 1-1.5W. However, the devices do not have a single-frequency output, which prevents their use in many applications. Furthermore, at the present time, their number of elements is limited to 20, which in turn limits the amount of coherent power. The proposed research consists of developing phase-locked antiguided arrays with distributed feedback as well as implementing novel concepts for creating 40-80-element single-spatial-mode arrays. The goals are: single-frequency, diffraction-limited-beam operation to 1W with linewidths 50kHz, and spatially coherent powers of 3W. The requested funds are for purchasing a high-resolution grating spectrometer with a CCD camera as well as a vibrating mirror for spectral near-field imaging of array modes. This will enable the study of the modal structure of novel devices as well as optimization for high-power single-mode operation. ***