REG: Femtosecond Optical Parametric Oscillators

9311164唐康奈尔大学电子工程学院将购买一台氩离子激光器，用于美国国家科学基金会支持的飞秒光源和半导体超快工艺项目。飞秒超快和光学技术已被成功地用于研究光学材料中的各种超快过程。然而，这些实验大多是用可见光630纳米左右的Rh6G染料激光进行的。显然需要将飞秒源扩展到紫外和红外，并实现广泛的可调性。我们最近首次成功地展示了高脉冲重复率的宽可调谐飞秒光学参量振荡器（fs OPO）。提出了一项研究计划，将调谐范围扩大到覆盖从大约400 nm到5 um的整个光谱，彻底表征器件，评估用于fs OPO的新型非线性光学晶体，并将开发的各种可调谐fs源应用于各种半导体材料和结构中热载子的超快弛豫动力学研究。这个项目的一个关键设备是氩离子激光器。目前使用的那种特殊的氩激光器已经过时了。ar激光器是激光源链中的第一个，它产生的问题向下传播到ti -蓝宝石激光器，飞秒光学参量振荡器，最后传播到超快过程实验。为了评估和充分实现这一新发展的潜力，使用可能的泵浦激光源，即氩离子激光器至关重要。v s t, F ^, + ^ _MM O M $ * $ ^ w x z D { 我 康奈尔大学9311164唐基础工程的学校将购买一个氩离子激光器用于NSF 3美元​_ $ $ $ $ $$ (F / $ 3 $ / 1 Courier Symbol & Arial 5 Courier New ((9 " h " e) R:\WW20USER\ABSTRACT。卡桑德拉·奎恩卡桑德拉·奎恩

9311164 Tang The School of Electrial Engineering at Cornell University will purchase an Argon ion laser to be used for the NSF-supported project on Femtosecond Optical Sources and Ultrafast Processes in Semiconductors. Femtosecond of ultrafast and optical techniques have been used with great success to study a variety of ultrafast processes in optical materials. Most of these experiments are, however, performed with the Rh6G dye laser around 630 nm in the visible. There is a clear need to extend the femtosecond sources to the uv and to the ir and to achieve wid tunability. We have recently succeeded in demonstrating for the first time a broadly tunable femtosecond optical parametric oscillator (fs OPO) at high pulse repetition rate. A program of research has been proposed to extend the tuning range to cover the entire spectrum from approximately 400 nm to 5 um, to thoroughly characterize the devices, to evaluate new nonlinear optical crystals for applications in fs OPO, and to apply the variety of tunable fs sources developed to the study of ultrafast relaxation dynamics of hot carriers in various semiconductor materials and structures. A key piece of equipment for such a project is the Argon Ion Laser. The particular Ar-laser currentyl is use is out dated. An problems originated in the Ar-laser, which is the first in a chain of laser sources, are propagated down-stream to the Ti-sapphire laser, the femtosecond opticl parametric oscillator, and finally to the experiments on ultrafast processes. To asses and to fully realize the potential of this new development, it is vitally important that the possible pump laser source, which ia an Argon ion laser, be used. v s t & F ^ & + ^_MM Õ M $ * $ ^ w x D z { I 9311164 Tang The School of Electrial Engineering at Cornell University will purchase an Argon ion laser to be used for the NSF $ 3 _ $ $ $ $ $ $ ( F / $ 3 $ / 1 Courier Symbol & Arial 5 Courier New ( ( 9 " h e e I R:\WW20USER\ABSTRACT.DOT Cassandra Queen Cassandra Queen