Array ( [0] => Array ( [title] => L14A [link] => https://www.youtube.com/embed/3ASPP54qwFc ) [1] => Array ( [title] => L14B [link] => https://www.youtube.com/embed/VANyxAIv-jo ) [2] => Array ( [title] => L14C [link] => https://www.youtube.com/embed/2OJOprBRn6I ) [3] => Array ( [title] => L14D [link] => https://www.youtube.com/embed/UmcKKFFlj3E ) [4] => Array ( [title] => L14E [link] => https://www.youtube.com/embed/KwHE_mZdeU0 ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第14講 Amplifiers and Lasers
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03-5715131#35401 mengfen@mx.nthu.edu.tw 吳小姐

Title

第14講 Amplifiers and Lasers

第1節

L14A

第2節

L14B

第3節

L14C

第4節

L14D

第5節

L14E

Syllabus

章節大綱

L14_A
          Transitions
          Stimulated emission
          Stimulated emission <-> Gain
          Gain needs pump
          Calculating the gain: Einstein A,B coefficients

 
L14_B
          Amplification: gain
          Population inversion
          Inversion: pumping the gain medium
          Different gain media
          Rate equations for a two-level system
          Two-level system does not give gain
 
L14_C
          Rate equations for a three-level system
          Three-level system: gain possible
          Rate equations for a four-level system
          Four-level system: gain easy
          Two-, three-, and four-level systems
 
L14_D
          LASER
          What does cavity do?
 
L14_E
          Cavity gives longitudinal modes
          Single-mode laser operation
          Types of Lasers
          Laser spectrum
          The Helium-Neon Laser
          Ion Lasers
          Dye lasers
          Titanium:Sapphire (Ti:S)
          Diode Lasers
          Two major type of LD
          Some everyday applications of diode lasers
          Fiber lasers
          LASIK
          Laser micro-machining

 

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