of a three-port quantum-well (QW) transistor laser (TL) by extending Kirchhoff's law to
include electron-photon interaction, to yield an electrical-optical form of Kirchhoff's law. The
TL circuit model includes both intrinsic device elements and extrinsic parasitic elements, and
fits accurately measured microwave S-parameters upto 20 GHz and matches also measured
eye-diagram data up to 13 Gb/s (equipment-limited). The TL model yields both electrical and …