Definition

Optical Signal Integrity (OSI) : Technology to increase the signal quality by reducing the noise from the imperfection of light as  signal carrier.

In optical communication field, light has been used as a signal carrier especially very high speed information channel. Signal in this domain has been characterized by several unique features, such as dispersion, chirp, beating...etc. Conventional quantity to measure the quality of signal analogues to electrical counter-part has also been used such as OSNR (Optical Signal-to-noise ratio). Since optical carrier has around few hundreds of Tera(10^12)-Hertz frequency and its coherence is temporal and limited spatial length, the imitation of the metrics of the signal quality is usually unsuccessful. This is due to the lack of understanding of the signal carrier. OSI need to be engaged properly in this regard when architectural design stage, post-design stage, verification as well as troubleshooting stage. This technology requires the understanding of coherent / incoherent noise random/deterministic jitter noise, beating, reflection noise (coherent/incoherent), ...of light signal. More...