Chromatic pulse dispersion correction - with pulsed beam split into spectral sectors and separate output signals derived and combined(NL281276)

摘要

The method is for the correction of chromatic pulse dispersion in optical fibres, especially when using beams of large spectral band-width such as those derived from light emitting diodes. The received beam (11) is split into a spectrum comprising sectors of different wave-lengths, and a detector signal is derived from the light contained in each sector. The sector signals are combined to generate the overall output signal. The beam (11) may be split into a divergent fan of beams (17, 19) which impinge on a flat surface (16) with a series of optical filters to select the different spectrum sectors.