Shunt current and excess temperature sensitivity of Ith and ηex in 1.3 μm InGaAsP DH lasers

Abstract

Shunt current flowing through p-n-p-n current blocking layers is examined as a possible cause of excess temperature sensitivity of Ith and ηex which is often observed in InGaAsP BC and BH lasers. Under certain conditions, the shunt current reduces the T0 value of Ith from 65 K to 45 K and that of ηex from 130 K to 40 K.