Semiconductor laser theory | Wikipedia audio article
Channel: wikipedia tts
Date: 18/02/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Semiconductor_laser_theory


00:00:56 1 Gain medium
00:06:26 2 Laser resonator
00:08:07 3 See also



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SUMMARY
=======
Semiconductor lasers or laser diodes play an important part in our everyday lives by providing cheap and compact-size lasers. They consist of complex multi-layer structures requiring nanometer scale accuracy and an elaborate design. Their theoretical description is important not only from a fundamental point of view, but also in order to generate new and improved designs. It is common to all systems that the laser is an inverted carrier density system. The carrier inversion results in an electromagnetic polarization which drives an electric field 
  
    
      
        E
        (
        t
        )
      
    
    {\displaystyle E(t)}
  . In most cases, the electric field is confined in a resonator, the properties of which are also important factors for laser performance.