Simultaneous subchannel data updating for multiple channels of 16-quadrature amplitude modulation signals using a single periodically poled lithium niobate waveguide

Authors

Hao Huang, Jeng-Yuan Yang, Xiaoxia Wu, Salman Khaleghi, Morteza Ziyadi, Moshe Tur, Carsten Langrock, Martin M. Fejer, Loukas Paraschis, and Alan E. Willner

Abstract

Subchannel data updating of high-order modulation format signals using cascaded sum- and difference-frequency generation in a single periodically poled lithium niobate waveguide is demonstrated. One quadrature phase-shift-keying subchannel of a 16-quadrature amplitude modulation (QAM) signal at 40  Gbit/s is successfully updated, with an optical signal-to-noise ratio (OSNR) penalty of ∼2  dB for return-to-zero and ∼4  dB for non-return-to-zero at a bit-error rate (BER) of 2×10−3. Simultaneous processing of four wavelength-multiplexed 16-QAM signals with an average OSNR penalty of 4.5 dB at a BER of 2×10−3 is also demonstrated.

Journal

Optics Letters

Volume

37

Number

21

Date

11/2012
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