Extracting OSNR From Low-Resolution Optical Channel Monitors

Author

Li, Mei ; Pendock, Graeme J. ; Evans, Rob J.

Author_Institution

Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic.

Volume

19

Issue

5

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

303

Lastpage

305

Abstract

Optical channel monitors (OCMs) that use scanning filters need to resolve the amplified spontaneous emission (ASE) noise floor between channels in order to determine optical signal-to-noise ratio (OSNR). We show how regularized least-squares can extract accurate OSNR values from raw spectra when the ASE floor is not visible because of insufficient resolution in the monitor. Our experimental results demonstrate OSNR measurement accuracy to within 0.6 dB from a spectrum of 50-GHz-spaced 10-Gb/s channels measured using a scanning Fabry-Peacuterot filter with 35-GHz bandwidth. The ability to use broader bandwidth filters in OCMs without sacrificing accuracy may reduce their cost and increase their robustness

Keywords

channel spacing; optical communication equipment; optical fibre communication; optical filters; optical noise; superradiance; 10 Gbit/s; 35 GHz; Fabry-Perot filter; OSNR; amplified spontaneous emission; bandwidth filters; channel spacing; optical channel monitors; optical signal-to-noise ratio; Bandwidth; Optical filters; Optical modulation; Optical noise; Optical receivers; Optical sensors; Optical signal processing; Signal resolution; Signal to noise ratio; Stimulated emission; Amplifier noise; inverse problems; least squares methods; monitoring; optical filters; signal processing; spectral analysis; wavelength-division multiplexing (WDM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.891246

Filename

4116744