| Issue |
Europhys. Lett.
Volume 52, Number 1, October I 2000
|
|
|---|---|---|
| Page(s) | 60 - 65 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2000-00404-8 | |
| Published online | 01 September 2002 | |
Amplification process in a laser injected by a narrow band weak signal
1
Laboratoire d'Optronique, associé au Centre National de la Recherche
Scientifique (UPRESA6082), Ecole Nationale des Sciences Appliquées et de Technologies
6 rue de Kérampont, 22305 Lannion, France
2
Department of Physics, UNC Charlotte - 28223, Charlotte, NC, USA
Corresponding author: stephan@enssat.fr
Received:
15
June
2000
Accepted:
2
August
2000
The process of amplification of light by a laser set above its oscillation threshold is studied.
This laser has a wide bandwidth (typically 100 MHz) and is injected by a signal whose bandwidth is
much narrower, which allows to separate the amplified signal from the ordinary laser spectral
density. Theoretical calculations are based on simple semiclassical formulas and agree with the
experimental results which are performed at 
using single-mode semiconductor lasers.
The amplification arises from a progressive channeling of energy from the wider laser line onto the
narrow injected signal.
PACS: 42.55.Ah – General laser theory / 42.55.Lt – Gas lasers including excimer and metal-vapor lasers / 42.60.Da – Resonators, cavities, amplifiers, arrays, and rings
© EDP Sciences, 2000
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