Analysis of direct-detection DPSK signal with homodyne crosstalk

Author

Ho, Keang-Po

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

23

Issue

9

fYear

2005

Firstpage

2681

Lastpage

2686

Abstract

When a differential-phase-shift-keying (DPSK) signal is directly detected using an asymmetric interferometer and balanced receiver, the exact error probability of the signal with homodyne crosstalk is derived analytically. Homodyne crosstalk from many interferers is Gaussian distributed, but the Gaussian model overestimates the signal-to-noise ratio (SNR) penalty for homodyne crosstalk from a single interferer. For the DPSK signal, the crosstalk ratio for a 1-dB SNR penalty must be less than -16.5 dB. For the same crosstalk ratio, the SNR penalty for a DPSK signal is far smaller than that for an ON-OFF keying (OOK) signal.

Keywords

Gaussian distribution; differential phase shift keying; error statistics; homodyne detection; light interferometry; optical crosstalk; optical receivers; DPSK signal analysis; Gaussian distribution; Gaussian model; SNR penalty; asymmetric interferometer; balanced receiver; crosstalk ratio; differential-phase-shift-keying; direct-detection DPSK; error probability; homodyne crosstalk; signal-to-noise ratio penalty; Differential quadrature phase shift keying; Error probability; Gaussian approximation; Optical crosstalk; Optical fiber networks; Optical filters; Optical polarization; Optical receivers; Optical sensors; Signal analysis; Differential-phase-shift-keying (DPSK); error probability; homodyne crosstalk;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2005.854040

Filename

1506844