Method for coupling an emitting device to a frequency splitter in an optical passive network

摘要

The invention aims to propose devices and a method to allow to estimate the drift induced by temperature variation in a network comprising a frequency splitter based on a Mac Zehnder, or alike component, and to track it over time. It is based on adding mirrors to the unused port of the Mac Zehnder components. Doing so, both OLT and ONU are able to scan a band of frequencies. The frequency corresponding to the nominal wavelength of the component will be reflected on the other port on the same side of the Mac Zehnder while other frequencies will go through the Mac Zehnder to be reflected by the mirror and come back to the emitter. By measuring the reflected signal while scanning frequencies, the actual nominal wavelength of the component can be determined.