The 'inverted' gain-levered semiconductor laser-direct modulation with enhanced frequency modulation and suppressed intensity modulation

摘要

A gain-levered semiconductor laser has enhanced efficiencies in both intensity modulation (IM) and frequency modulation (FM). It is shown that by inverting the bias points of the gain and modulation sections, a mode of operation referred to as 'inverted' gain-lever, the FM efficiency is suppressed. The large FM-to-FM ratio makes it a desirable source for an FM optical transmitter.