Question

What is the process responsible for producing photons in a diode laser​

Answer 1

Answer:

Electron-hole recombination.

Explanation:

Buddy, The process in which an electron, which has been excited from the valence band to the conduction band of a semiconductor, falls back into an empty state in the valence band, which is known as a hole.

Electron-hole recombination requires an excited semiconductor in which both electrons and holes occupy the same volume of the crystal.