Polarization-independent DPSK demodulation using a birefringent fiber loop

Author

Chow, C.W. ; Tsang, H.K.

Author_Institution

Dept. of Electron. Eng., Chinese Univ. of Hong Kong, China

Volume

17

Issue

6

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

1313

Lastpage

1315

Abstract

A robust polarization-independent technique for demodulating optical differential phase-shift-keying (DPSK) signals using a birefringent-fiber-loop (BFL) is proposed and demonstrated. The BFL has a differential group delay between its fast and slow optical axes, providing interference which allows the phase modulation to be converted to intensity modulation and then directly detected by a photodiode. Error-free bit-error-rate measurements and clear demodulated eyes were observed. The temperature stability of the scheme improves with the bit rate of the DPSK signal.

Keywords

birefringence; delays; demodulation; differential phase shift keying; error statistics; intensity modulation; light interference; light polarisation; optical fibre communication; optical modulation; photodiodes; birefringent fiber loop; differential group delay; error-free bit-error-rate; intensity modulation; optical differential phase-shift-keying; phase modulation; photodiode; polarization-independent DPSK demodulation; Birefringence; Delay; Demodulation; Differential quadrature phase shift keying; Interference; Optical fiber polarization; Optical modulation; Phase modulation; Phase shift keying; Robustness; Birefringent fiber (BF); differential phase-shift keying (DPSK); optical fiber communication;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2005.846566

Filename

1432813