Effect of polarisation-dependent loss on the performance accuracy of a ratiometric wavelength measurement system

Author

Rajan, G. ; Wang, Q. ; Semenova, Y. ; Farrell, G. ; Wang, P.

Author_Institution

Sch. of Electron. & Commun. Eng., Appl. Optoelectron. Centre, Dublin Inst. of Technol., Dublin

Volume

2

Issue

2

fYear

2008

fDate

4/1/2008 12:00:00 AM

Firstpage

63

Lastpage

68

Abstract

The polarisation-dependent loss (PDL) of a ratiometric wavelength measurement system and its influence on system´s accuracy are investigated theoretically and experimentally. The PDL of a ratiometric system and the corresponding power ratio fluctuation is modelled, from which the accuracy of the measured wavelength can be estimated. An all-fibre wavelength measurement system is built to allow comparison of modelled and actual results. The measured ratio variation lies within the estimated limits. The measured wavelength error reaches about 1.41 plusmn 0.09 nm at 1550 nm in the demonstrated example (with an edge filter of average slope 0.22 dB/nm), which indicates the significant influence of PDL on the accuracy of a ratiometric wavelength measurement system.

Keywords

measurement errors; optical fibre filters; optical fibre losses; optical fibre polarisation; optical fibre testing; optical loss measurement; PDL; all-fibre wavelength measurement system; edge filter; polarisation-dependent loss; power ratio fluctuation; ratiometric wavelength measurement system; wavelength 1550 nm; wavelength error;

fLanguage

English

Journal_Title

Optoelectronics, IET

Publisher

iet

ISSN

1751-8768

Type

jour

DOI

10.1049/iet-opt:20070028

Filename

4483857