DocumentCode :
1135046
Title :
Noise and correlation effects in GaAlAs broad-band sources
Author :
Dandridge, A. ; Taylor, H.F.
Author_Institution :
Naval Research Laboratory, Washington, DC, USA
Volume :
5
Issue :
5
fYear :
1987
fDate :
5/1/1987 12:00:00 AM
Firstpage :
689
Lastpage :
693
Abstract :
Intensity fluctuations in GaAlAs superluminescent diodes have been measured at low frequencies ( 
kHz). A monotonic increase in the relative noise with increasing dc bias current was observed. The correlation in noise for light emitted from the two facets was also investigated. The coherence function for the emission from the two facets was found to be near zero at low current levels, and to increase to a maximum value near 0.7 at higher currents. A model which hypothesizes uncorrelated local current fluctuations in different parts of the active region explains the main features of the measured results.
kHz). A monotonic increase in the relative noise with increasing dc bias current was observed. The correlation in noise for light emitted from the two facets was also investigated. The coherence function for the emission from the two facets was found to be near zero at low current levels, and to increase to a maximum value near 0.7 at higher currents. A model which hypothesizes uncorrelated local current fluctuations in different parts of the active region explains the main features of the measured results.Keywords :
Correlations; Gallium materials/lasers; Laser noise; Superluminescent diodes; Acoustic noise; Current measurement; Diode lasers; Fluctuations; Frequency; Laser noise; Low-frequency noise; Semiconductor device noise; Semiconductor lasers; Superluminescent diodes;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.1987.1075560
Filename :
1075560
Link To Document :
