REG: Femtosecond Optical Parametric Oscillators

9311164唐康奈尔大学电子工程学院将购买一台Ar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经成功地用于研究光学材料中的各种超快过程。然而，这些实验中的大多数都是在可见光下使用Rh6G染料激光器进行的，波长约为630 nm。显然需要将飞秒源扩展到UV和IR，并实现宽可调谐。最近，我们首次成功地展示了一种高重复频率宽可调的飞秒光学参量振荡器。已经提出了一项研究计划，将调谐范围扩大到整个光谱，从大约400 nm扩展到5微米，彻底表征器件，评估新型非线性光学晶体在飞秒光学振荡器中的应用，并将发展起来的各种可调谐飞秒光源应用于研究各种半导体材料和结构中热载流子的超快驰豫动力学。这种项目的一个关键设备是氩离子激光器。目前使用的特定Ar-激光已过时。问题源于Ar激光器，这是一系列激光源中的第一个，向下游传播到钛蓝宝石激光器，飞秒光学参数振荡器，最后到超快过程的实验。为了评估和充分实现这一新发展的潜力，至关重要的是使用可能的泵浦激光源，即Ar离子激光器。V S t&amp；F^&amp；+^_MM‘M$*$^w x D z{i9311164唐康奈尔大学电子工程学院将为国家科学基金会购买一台Ar离子激光器3美元_$$(F/$3$/1信使符号&amp；Arial 5新信使((9“h e e i R：\WW20USER\ABSTRACT.DOT Cassandra Queen Cassandra Queen

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