Measurement of spectra of and correlation between FM and AM noises in GaAlAs lasers

29 September 1983

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 19 (20) , 812-813
https://doi.org/10.1049/el:19830554

Abstract

The FM- and AM-noise spectra of a CSP-type GaAlAs laser, and the correlation between FM and AM noises, were measured in the frequency range below 100 kHz with the bias current as a parameter. The measured spectra consist of power-independent 1/f noise and power-dependent white-noise components. A strong correlation is observed between the FM and AM noises when the output power is small. This fact supports the theory developed by Henry, in which the amplitude-phase coupling causes the linewidth increase.

Keywords

III-V SEMICONDUCTOR
GAALAS LASERS
AMPLITUDE-PHASE COUPLING
POWER-INDEPENDENT 1/F NOISE
BIAS CURRENT PARAMETER
CHANNEL SUBSTRATE PLANAR SEMICONDUCTOR LASER
CSP-TYPE
RANDOM NOISE
AM-NOISE SPECTRA
POWER-DEPENDENT WHITE NOISE
FM NOISE SPECTRA
&LT
100 KHZ
LINEWIDTH INCREASE