Alignment monitoring technique for pulse carver and data modulator in RZ-DPSK systems using an optical frequency discriminator

Author

Tsai, Kuen Ting ; Lu, Guo-Wei ; Chen, Lian-Kuan ; Way, Winston I.

Author_Institution

Dept. of Commun. Eng., Nat. Chiao-Tung Univ., Hsinchu

Volume

18

Issue

10

fYear

2006

fDate

5/1/2006 12:00:00 AM

Firstpage

1119

Lastpage

1121

Abstract

A technique for monitoring the timing alignment between a pulse carver and a phase modulator in return-to-zero differential phase-shift keying systems is proposed. An optical frequency discriminator and a microwave detector centered at a half of the phase modulation data rate are used to monitor the spectrum broadening caused by timing misalignment. The proposed method has a large detection dynamic range and is polarization-independent

Keywords

differential phase shift keying; microwave detectors; optical fibre communication; optical modulation; spectral line broadening; synchronisation; RZ-DPSK systems; alignment monitoring; data modulator; detection dynamic range; microwave detector; optical frequency discriminator; phase modulation data rate; phase modulator; pulse carver; return-to-zero differential phase-shift keying; spectrum broadening; synchronization; timing alignment; Differential phase shift keying; Dynamic range; Monitoring; Optical modulation; Optical pulses; Phase detection; Phase frequency detector; Phase modulation; Pulse modulation; Timing; Differential phase-shift keying (DPSK); frequency discriminator; monitoring; synchronization;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.873962

Filename

1626334