Abstract: The present invention relates to a thermally insulated optical module. A heat source/sink is thermally coupled with an optical element for sourcing/sinking heat there to/from for temperature regulating the optical element. A thermally insulating packaging forms an enclosure surrounding the optical element. The thermally insulating packaging provides a thermally controlled environment within the enclosure. A thermally conductive structure is disposed within the enclosure and is thermally coupled to the heat source/sink for being temperature regulated thereby. The thermally conductive structure outlines a space surrounding the optical element for providing together with the heat source/sink a second thermally controlled environment therein. The second thermally controlled environment provides a lower temperature gradient across the optical element than absent the thermally conductive structure.

Abstract: With current WDM technology a plurality of individual data channels exist on each fiber. Each of these data channels must be individually monitored in these WDM systems to ensure data signal quality. Monitoring of these signals is accomplished with the use of an optical performance monitor (OPM). An accurate known reference source is required for the OPM to provide reliable monitoring of signal data. The invention couples a reference signal simultaneously with a data signal and provides this combined optical signal to an OPM monitor for the purpose of obtaining high accuracy wavelength data at low cost.