Threshold and Modulation Characteristics of Photon-Recycled Semiconductor Lasers

Abstract
Threshold current characteristics of semiconductor lasers with photon recycling are theoretically investigated. By introducing rate equations modeling the reabsorption of spontaneous emission, the effect of photon recycling has been elucidated. The possibility of threshold reduction by a factor of more than three is suggested for a realizable closed cavity. In addition, modulation characteristics are also discussed.