What is the achievable value of gain coefficient (in cm^-1) for semiconductor gain media?

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Denis G. Baranov

Mauro Andrea Bettiati,

I'm interested not in the modal gain, which depends on geometry of the structure. I would like to know what the gain mateiral itself is capable of whatever the geometry of the system is.

few thousands 1/cm - the same value (on the order of magnitude) as for organic dyes?