GHz optical communication experiments using lead-salt laser diodes in the 3.5–5.5μm wavelength region

Estimation of the linewidth enhancement factor for a PbCdS diode laser

“…These lasers have unfortunately not been suitable for communication systems because of properties such as sensitivity to optical feedback [3] and transverse mode instabilities [4]. However, recent prog ress in fabrication techniques [5]- [6] has resulted in im proved laser performance, e.g., PbCdS diode lasers have been modulated beyond 1 GHz using an ordinary micro wave bias-tee [7].…”