Discuss two methods for achieving optical confinement in diode lasers? Which met

Question

Discuss two methods for achieving optical confinement in diode lasers? Which methods can be achieved in a homostructure device? (Hint: carrier and photon confinement, or gain and index guiding)
Note* studying laser diodes in a lasers class Discuss two methods for achieving optical confinement in diode lasers? Which methods can be achieved in a homostructure device? (Hint: carrier and photon confinement, or gain and index guiding)
Note* studying laser diodes in a lasers class
Note* studying laser diodes in a lasers class

Explanation / Answer

As mentioned in the hint, Carrier confinement & Photon confinement are two ways of acheiving optical confinement in diode laser.Carrier Confinement is used to achieve high level radiative recombination in the active region.Photon confinement deals with preventing absorption of emitted radiation by material surrounding the pn junction.To achieve these confinements the most effective device is double hetrostructure device which is Double hetrojunction Laser . it is made by narrowing the injected current to a thin stripe of active material. This increased density over a small area will allow for further reducing of the current . This also helps in continuous wave operation at even room temperature. In an Double Hetrostructure , the active region is sandwiched between a p- and n-type AlGaAs

I will provide you a link as am not able to show you all the diagramns as i am constrained with the no. of words to be uesd here. please refer the same link and a good refrence book

Integrated Optics: Theory and Technology

By Robert G. Hunsperger

https://dvikan.no/ntnu-studentserver/reports/Report%20semiconductor_lasers.pdf

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