Premium
Gain–Cavity Alignment in Efficient Visible (660 nm) VCSELs Studied Using High Pressure Techniques
Author(s) -
Sale T.E.,
Sweeney S.J.,
Knowles G.,
Adams A.R.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200101)223:2<587::aid-pssb587>3.0.co;2-z
Subject(s) - materials science , offset (computer science) , optics , hydrostatic pressure , optoelectronics , laser , vertical cavity surface emitting laser , physics , computer science , thermodynamics , programming language
Visible (660 nm) vertical‐cavity surface‐emitting lasers (VCSELs) for polymer fibre applications are very sensitive to temperature fluctuations and structural errors. Two devices with a 3 meV wave length separation were studied. Significant differences in the output performance can be explained by the relative offset of the cavity mode and the peak of the gain spectrum. The different behaviour of the two devices as a function of hydrostatic pressure can be explained by the gain–cavity offset. Temperature and pressure both shift the offset, but self‐heating means that the cw variation is not always as expected. Electron leakage also changes with both pressure and temperature, and in both cases its effect is dominant over the gain–cavity offset in determining the threshold current variation.