Lecture1激光原理.ppt
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1、第一章第一章 激光的基本原理激光的基本原理本次课内容: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光子学研究光子作为信息、能量载体的一门科学光子技术相干光的产生 激光原理激光原理 相干光的控制(调制、偏转),变换(频率)光电子技术光电子技术 相干光的检测及应用 光光 电电 子子 学学(技技术术)光电检测光电检测应用光电子技术应用光电子技术电子学;电子技术平时作业:平时作业:10 期末考试:期末考试:90 Academic Subjects in Optics ScienceAcademic Subjects in Optics
2、SciencelRay Optics (Geometric Optics)lWave OpticslBeam OpticslFourier Optics (Information Optics)lElectromagnetic OpticslGuided-Wave OpticslFiber OpticslPhotonic-Crystal OpticslStatistical OpticslResonator Optics and LaserlSemiconductor OpticslNonlinear OpticslQuantum Optics The Birth of the LaserTh
3、e Birth of the LaserIf-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 domesticated it.In 1916 in his seminal paper,Albert Einstein showed that light traversing a medium could n
4、ot 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 Brossel(1948)-that the possibility of amplifying radiation was unambiguously demonstrated.The next ste
5、p 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.Prokhorov and Nicolay G.Basov.(Maser)In 1958 Townes and Arthur L.Schawllow wrote the germinal laser paper,describing how
6、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 road leading to the laser proved to be arduous and after few years,the pursuit became elusive and the interest started to
7、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 first coherent light gushing out of a ruby rod.Ted Maiman made a laser(originally named an optical maser)for the first time in h
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