Title :
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
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;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2035091
