Effect of Phase Shift Deviation on the Performance of an Optical 90o Hybrid without Cross-over

Wei Hua Liu; Cheng Zhi Xu; Yuan Zhong Xu

doi:10.4028/www.scientific.net/AMR.403-408.1813

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 403-408Effect of Phase Shift Deviation on the Performance...

Effect of Phase Shift Deviation on the Performance of an Optical 90^o Hybrid without Cross-over

Abstract:

The effect of the phase deviation on the phase shifter in a 2 × 4 optical 90 hybrid without cross-over is discussed based on a set of formulas derived for the output of this structure. We found that if the two power inputs are equal, the phase deviation of the phase shifter only introduces attenuation in output AC component, and if not equal, it not only introduces the AC component attenuation, but also leads to DC component differentiation, which degrades the optical signal-to-noise ratio of the quadrature output.

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Periodical:

Advanced Materials Research (Volumes 403-408)

Pages:

1813-1816

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.403-408.1813

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Online since:

November 2011

Authors:

Wei Hua Liu, Cheng Zhi Xu, Yuan Zhong Xu

Keywords:

Coherent Receiver, Multimode Interference Coupler, Optical 90° Hybrid, QPSK Demodulator

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