Title :
High performance balanced heterodyne front end using special fibre coupling scheme
Author :
Wahl, C. ; Gaukel, G. ; Auracher, F.
Abstract :
A balanced receiver module for coherent optical systems is presented. The high impedance receiver has 0.75 dB gain ripple and a bandwidth of 2.8 GHz. The average equivalent input noise current density is 5.7 pA/Hz, the responsivity is better than 1 A/W. A sensitivity of 71 photoelectrons/bit has been achieved in a 140 Mbit/s FSK heterodyne system.
Keywords :
frequency shift keying; hybrid integrated circuits; microwave amplifiers; microwave integrated circuits; optical communication equipment; optical couplers; p-i-n diodes; photodiodes; receivers; 0 to 2.8 GHz; 140 Mbit/s; 2.8 GHz; FSK heterodyne system; UHF; balanced heterodyne front end; balanced receiver module; bandwidth; coherent optical systems; equivalent input noise current density; fibre coupling scheme; high impedance receiver; optical receivers; responsivity; sensitivity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19910161
