Method and device for creating a control channel in an optical transmission signal and method and device for extracting the information included therein
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United States of America Patent
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Oct 31, 2017
Grant Date -
Oct 13, 2016
app pub date -
Apr 4, 2016
filing date -
Apr 9, 2015
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Abstract
The invention relates to a method for creating a control channel in an optical transmission signal, wherein the optical transmission signal (SDS,i, SUS,i) includes an optical carrier frequency component, a higher frequency modulation component carrying user information to be transported from a first end to a second end of an optical transmission link and a lower frequency modulation component carrying control information, the higher frequency modulation component realizing a user channel and the lower frequency modulation component realizing the control channel, and wherein the lower frequency modulation component is created by amplitude modulation. According to the invention, the lower frequency modulation component includes a binary digital pilot tone signal component which corresponds to a pilot tone signal having a predetermined pilot tone frequency (fi).
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