CUED Publications database

Superfluorescence in semiconductor lasers

Vasil'ev, PP (1997) Superfluorescence in semiconductor lasers. Quantum Electronics, 27. pp. 860-865. ISSN 1063-7818

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An analysis is made of the conditions for the generation of superfluorescence pulses in an inverted medium of electron-hole pairs in a semiconductor. It is shown that strong optical amplification in laser semiconductor amplifiers characterised by αL ≫ 1 (α is the small-signal gain and L is the amplifier length) leads to suppression of phase relaxation of the medium during the initial stages of evolution of superfluorescence and to formation of a macroscopic dipole from electron - hole pairs. Cooperative emission of radiation in this system results in generation of a powerful ultrashort pulse of the optical gain, which interacts coherently with the semiconductor medium. It is shown that coherent pulsations of the optical field, observed earlier by the author in Q-switched semiconductor lasers, are the result of superfluorescence and of the coherent interaction between the optical field and the medium.

Item Type: Article
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 02 Sep 2016 17:04
Last Modified: 20 Oct 2016 07:43