Title :
Optical 90 degrees hybrid Costas-type receivers
Author_Institution :
Inst. fur Nachrichtentech. und Hochfrequenztech., Tech Univ. Wien, Austria
Abstract :
A 90 degrees hybrid which consists of a beam combiner and two polarisation separators is proposed for optical preprocessing in Costas homodyne receivers. It utilises all the available optical power. The power distribution between the inphase and the quadrature arm can be arbitrarily adjusted.
Keywords :
optical communication equipment; picture processing; receivers; 90 degrees hybrid; Costas homodyne receivers; beam combiner; optical preprocessing; optical receiver; polarisation separators; power distribution;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900918
