Coherent optical BPSK detection

Author

Uzunoglu, Vasil ; Ma, Zliigang ; White, Marvin H.

Author_Institution

Synchtrack, Gaithersburg, MD, USA

fYear

1991

fDate

7-10 Apr 1991

Abstract

Summary form only given. A coherent phase-locked synchronous oscillator (CPSO) was created by adding a feedforward and a feedback loop to the SO. An optically excited CPSO network was formed using a 4.3-GHz AVANTEK oscillator. Before the CPSO loop was formed, the oscillator was tuned near the subcarrier frequency with the DC bias in the loop filter. When the oscillator was tuned to within +/-3 MHz, the loop could be closed and the CPSO phase locked to the subcarrier frequency. An extremely pure subcarrier signal was obtained. The recovered subcarrier and subcarrier+data (supplied from the transmitter in this case) are applied to the mixer to detect the data. In a proper coherent detection scheme the subcarrier+data are recovered at the output of the photodiode

Keywords

optical links; optical modulation; oscillators; phase shift keying; phase-locked loops; signal detection; 4.3 GHz; AVANTEK oscillator; DC bias; coherent detection; coherent phase-locked synchronous oscillator; feedback loop; feedforward loop; loop filter; mixer; optical BPSK detection; recovered data; recovered subcarrier; subcarrier frequency; Binary phase shift keying; Feedback loop; Frequency; Optical detectors; Optical feedback; Optical fiber networks; Optical filters; Optical transmitters; Oscillators; Photodiodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Southeastcon '91., IEEE Proceedings of

Conference_Location

Williamsburg, VA

Print_ISBN

0-7803-0033-5

Type

conf

DOI

10.1109/SECON.1991.147759

Filename

147759