Explain about the homojunction laser in brief, Physics

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Explain about the Homojunction Laser in brief.

Homojunction Laser:

Assume that GaAs be doped with T providing n-type material and with Ge providing p-type material. In forward bias (p-type side is made positive), the majority carriers that is, the electrons into n-side and the holes into p-side are injected across the depletion area into both directions to create a population inversion into a narrow active region. The light produced through radioactive recombination across the band gap is confined within this active region.

1837_Homojunction Laser.png

Typical output optical power verses diode current (f) characterises and the corresponding output spectrum of a laser diode.


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