Open AccessThe influence of injection current on transverse mode characteristics of vertical-cavity surface-emitting lasers
Author(s) -
Hao Yang,
Xia Guo,
Baolu Guan,
Tongxi Wang,
Shen Guang-di
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.2959
Subject(s) - transverse plane , aperture (computer memory) , materials science , transverse mode , laser , optics , mode (computer interface) , current (fluid) , rate equation , enhanced data rates for gsm evolution , surface (topology) , optoelectronics , physics , kinetics , geometry , thermodynamics , telecommunications , mathematics , structural engineering , computer science , acoustics , engineering , operating system , quantum mechanics
The influence of transverse mode were researched with the injection current changing via experiments conducted with 980nm oxide-confined vertical cavity surface emitting lasers (VCSELs). Based on the spatio-temporal rate equation, the injection parameter dependence of the transverse mode characteristics of weak-index guiding VCSELs were theoretically researched by integrating the spatially dependent part. The result of the experiment indicated that the higher-order modes begin to emerge and exhibit strong competition with the injection current increased when the oxidized aperture was kept unchanged, and the distribution of the carrier transfers from the center to the edge. Furthermore, the main order becomes weaker because of the spatial hole burning. Compared with the appearance of higher-order modes with different oxidized aperture, the small injection aperture exhibits better single mode behavior.