Research Equipment Grant-Development of Testbed for Ultra- Fast Opto-Electronic Devices

9413393， PI-Garmire：该提案旨在开发一个测试平台，以推进光纤和无线通信的10-90 GHz光电子设备的最新技术，作为新兴的国家信息高速公路的一部分。该测试将有助于研究功能性锁模半导体激光器的高速开关能力。单片锁模器件，在10-90 GHz范围内，通过数字切换锁模频率来实现功能。为了最小化开关时间和优化效率，有必要了解非线性增益与腔谐振结构之间的相互作用。多功能射频调制激光器需要超高速光泵浦探测实验，其时间分辨率远快于调制速率。由于在局域网和长途通信中应用，需要1.3 um和1.5 um波长区域。由于目前还没有将光通信所需波长的超短脉冲产生与研究调制半导体激光器所需的电定时相结合的系统，因此需要对该试验台进行开发。一个开发，提议的测试平台将为加州大学伯克利分校和南加州大学的研究人员之间的合作提供基础。这些研究人员结合了光泵浦探针研究和先进半导体激光器和腔动力学方面的专业知识。参与开发的还有可调谐固体激光器方面的专家。单模锁定Nd:YAG激光器将用于泵浦近1.3 um的Cr4+:Forsterite激光器和近1.5 um的Cr4+:YAG激光器。新的晶体和新的方法也将寻求主动更大的波长调谐和更容易操作。设计和建立光学和电子之间的定时同步机制；目的是实现在光电器件研究中使用的最实用和可靠的系统。如果有足够的资金，还将建立同步泵浦锁模光参量振荡器，并将其性能与可调谐锁模激光器进行比较。结果将是一个独特的测试平台，主要位于南加州大学的激光研究中心，并在加州大学伯克利分校提供辅助设施，用于研究光电设备。这个试验台将提供给来自其他大学、工业和政府实验室的研究人员。使用该试验台的研究将导致新的功能光电激光器设计，以及多ghz通信系统中性能测量的定义和演示。这个试验台将提供给其他大学、工业和政府实验室的研究人员。使用该试验台的研究将导致新的功能光电激光器设计，以及多ghz通信系统中性能测量的定义和演示。该试验台还将进一步研究载流子动态随时间和位置变化的基础科学。配套的支持将来自几家公司、激光研究中心工业附属计划和南加州大学的研究捐赠计划。

9413393, PI-Garmire: This proposal is to develop a testbed to advance the state of the art in 10-90 GHz optoelecetronic devices for fiber and wireless communications as part of the emerging national information highway. The tested will enable study of the high speed switching capabilities of functional, mode-locked semiconductor laser. Monolithic mode-locked devices, in the range form 10-90 GHz, and achieve functionality by digitally switching mode-locked frequencies. To minimize switching time and optimize efficiency, it is necessary to understand the interplay between nonlinear gain and the cavity resonance structure. Ultra-fast optical pump-probe experiments are needed on multi-functional RF-modulated lasers, with time resolution much faster than the modulation rate. The 1.3 um and 1.5 wavelength regions are needed because of their application to local area network and long-haul communications. Development is needed for this testbed because there is no system in existence that combines ultra-short pulse generation at wavelengths of interest for optical communications with the electrical timing required to study modulated semiconductor lasers. One developed, the proposed testbed will provide the basis for collaboration between investigators at University of California, Berkeley and University of Southern California. These researchers combine expertise in optical pump-probe studies and expertise in advanced semiconductor lasers and cavity dynamics. Also involved in the development will be experts in tunable solid state lasers. A single mode-locked Nd:YAG laser will be used to pump both a Cr4+:Forsterite laser near 1.3 um and a Cr4+:YAG laser near 1.5 um. New crystals and new approaches will also be sought to active greater wavelength tuning and greater ease of operation. Mechanisms for timing synchronism between the optics and electronics will be designed and built; the aim is to achieve the most practical and reliable systems to use in opto-electronic device studies. If sufficient funds can be found, a synchronously pumped mode-locked optical parametric oscillator will also be built and its performance compared to tunable mode-locked lasers. The outcome will be a unique testbed, located primarily at the Center for laser Studies at USC, with complementary facilities at UC Berkeley, designed for study of opto-electronic devices. This testbed will be made available to researchers form other universities, industry, and government laboratories. Research using the testbed should result in new functional opto-electronic laser designs, along with definition and demonstration of performance measures in multi-GHz communication systems. This testbed will be made available to researchers from other universities , industry, and government laboratories. Research using the testbed should result in new functional opto-electronic laser designs, along with definition and demonstration of performance measures in multi-GHz communication systems. This testbed will also further the basic science of carrier dynamic as a function of time and position within functional semiconductor lasers. Matching support will come form several compainies, the Center for Laser Studies Industrial Affiliates Program, and from USC's gift program for research.