Lecture1激光原理.ppt

1、第一章 激光的基本原理,本次课内容： 绪论简介 1.1 相干性的光子描述,绪论简介,光电子学是汇集光子学、电子学、光子技术与电子技术的一门学科,平时作业：10 期末考试：90,Academic Subjects in Optics Science,Ray Optics (Geometric Optics) Wave Optics Beam Optics Fourier Optics (Information Optics) Electromagnetic Optics Guided-Wave Optics Fiber Optics Photonic-Crystal Optics Statist

2、ical Optics Resonator Optics and Laser Semiconductor Optics Nonlinear Optics Quantum Optics,The Birth of the Laser,If-according to high-energy physics-light appeared 14 billion years ago, 10 seconds after the Big Bang, then it is only fifty years ago that mankind consciously controlled and domestica

3、ted it.,In 1916 in his seminal paper, Albert Einstein showed that light traversing a medium could not only be absorbed but that it could also be amplified, an effect thereafter called stimulated emission.,However, it was not until the 1940s and 1950s-notably with the work of Alfred Kastler and Jean

4、Brossel (1948)-that the possibility of amplifying radiation was unambiguously demonstrated.,The next step was to make a “light” or radiation oscillator. It was first demonstrated in 1954 in the microwave regime (where the wavelength of “light” is around cm) by Charles H. Townes, Alexander M. Prokhor

5、ov and Nicolay G. Basov. (Maser),In 1958 Townes and Arthur L. Schawllow wrote the germinal laser paper, describing how to build an optical maser. From then on, the possibility to tame light by demonstrating the optical maser was at the top of the research agendas for all major laboratories.,But the

6、road leading to the laser proved to be arduous and after few years, the pursuit became elusive and the interest started to fade.,Then, against all odds and out of left field, on the 16th of May 1960 at the Hughes Research Laboratory in Malibu, the crispy noise of a photographic flash announced the f

7、irst coherent light gushing out of a ruby rod. Ted Maiman made a laser (originally named an optical maser) for the first time in history.,Kathleen Maiman and her late husband-Theodore H. Maiman,Nobel Laureates in the Area of Laser,1964 : Charles H. Townes, Alexsandr M. Prokhorov, and Nicolay G. Baso

8、v For their theoretical work paving the way for the first laser made by Maiman. 1966 : Alfred Kastler For the discovery and the developement of optical pumping” technique. 1981 : Nicolaas Bloembergen and Arthur L. Schawlow For their decisive contributions to the laser spectroscopy and nonlinear opti

9、cs. 1989 : Norman F. Ramsey For his invention of the separated oscillatory field method (atomic clocks) 1997 : Steven Chu, Claude Cohen-Tannoudji, and William D. Phillips For the development of methods to cool and trap atoms with laser light. 1999 : Ahmed Zewail (chemistry) For the utilization of fe

10、mtosecond lasers in the femtochemistry. 2000 : Zhores I. Alferov and Herbert Kroemer For developing semiconductor heterostructures used in optoelectronics. 2001 : Eric A. Cornell, Wolfgang Ketterle, and Carl E. Wieman For the realization of the first BoseEinstein condensate in 1995. 2005 : John L. H

11、all and Theodor W. Hnsch For the developement of high-precision laser spectroscopy. 2009 : Charles K. Kao (Chinese University of Hong Kong ) For his achievements concerning the transmission of light in fibers.,50 years of the Laser -La Ville Lumire,C. H. Townes,N. Bloembergen,Claude Cohen-Tannoudji,

12、Ahmed Zewail,H. Kroemer,C.K. Kao,Kathleen Maiman,Palais du Louvre (卢浮宫),激光发展的历史回顾,1917: 爱因斯坦(A.Einstein) 提出了受激辐射可以实现光放大的概念, 导致激光发明的理论基础 1917年以后近四十年内 量子理论的发展; 粒子数反转的有效实现;电子学与微波技术的发展 1954:美国汤斯(C.H.Townes)前苏联巴索夫(N.G.Basov)和普洛霍洛夫(A.M.Prokhorov)第一次实现氨分子微波量子振荡器(MASER) 1958: 美国汤斯与肖洛(A.L.Schawlow)提出了利用开放式光学谐振腔实现光振荡的新思想;布隆伯根(N.Bloembergen)提出利用光泵浦三能级系统实现粒子数反转分布的新构思 1960.7：美国休斯公司实验室梅曼（T.H.Maiman)演示了世界上第一台红宝石固态激光器 1997: 朱棣文、菲利普（W.D.Phillips)和塔罗季（C.C.Tannoudi)由于利用激光冷却和钳制原子的研究结果,共获诺贝尔物理奖,几点启示: 任何一项发明都是继前人研究的结果, 不是凭空产生的 机遇偏爱有准备的头脑 大胆设想, 勇于创新，勇于实践,锲而不舍,中、英文参考书： Amnon