Theory of Mitigate Temperature Effect on the Equilibrium Point in Vertical Cavity Surface Emitting Lasers

This paper presents a way to mitigate the influence of temperature effects on the equilibrium point (q-point) of vertical cavity surface emitting lasers (vcsels) by investigating the effect of laser injection current (iinj) and dc-bias level (ibias) numerically using mathcad software. results show that, by changing temperature 50 oc (i.e. from 10 to 60) with iinj = 3ith and ibias = 0, the photons density (p(t)) has decreased from 1.636 × 1016 cm-3 to 0.733 × 1016 cm-3, the carrier density (n(t)) has increased from 2.367 × 1018 cm-3 to 2.669 × 1018 cm-3 and the laser output power (pout) has decreased from the 2.366 mw to the 1.025 mw. in contrast, by increasing the iinj from 3ith to 5ith and the ibias from 0 to 1.5ith, the rate of the decreasing in the p(t) and in the pout have reduced more than 25%. %25.