Interferometric In-Phase and Quadrature Oscilloscope

Author

Krause, David J. ; Cartledge, John C. ; Laperle, Charles ; Roberts, Kim

Author_Institution

Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada

Volume

27

Issue

24

fYear

2009

Firstpage

5749

Lastpage

5754

Abstract

A technique is presented for measuring the in-phase and quadrature components of a modulated optical signal, using standard electrical and optical components and a high-bandwidth equivalent-time sampling oscilloscope. The measurement setup consists of an interferometer, optical mixer, and sampling oscilloscope with two low-speed sampling modules (50 kHz) and two high-speed optical sampling modules (65 GHz). The simultaneous measurement of four de-skewed signals allows for the separate determination of the phase noise, amplitude modulation, and phase modulation. From these results, the complete trajectory in time of the complex signal is constructed.

Keywords

amplitude modulation; high-speed optical techniques; light interferometry; optical fibre communication; optical modulation; oscilloscopes; phase modulation; phase noise; signal sampling; amplitude modulation; equivalent-time sampling oscilloscope; high-speed optical sampling modules; interferometric in-phase oscilloscope; interferometric quadrature oscilloscope; low-speed sampling modules; optical mixer; optical signal modulation; phase modulation; phase noise; Optical field measurement; optical modulation;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2009.2035091

Filename

5306114