Títol:
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Simplified carrier recovery for intradyne optical PSK receivers in udWDM-PON
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Autor/a:
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Tabares Giraldo, Jeison; Ghasemi, Saeed; Polo Querol, Víctor; Prat Gomà, Josep Joan
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Altres autors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. GCO - Grup de Comunicacions Òptiques |
Abstract:
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Abstract:
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We present an optimized carrier recovery architecture based on differential detection for coherent optical receivers that substantially reduces the required DSP hardware resources, aimed at cost-effective transceivers for access networks applications. The proposed architecture shares the 1-symbol complex correlation required for differential phase detection within both the frequency estimation and the phase recovery blocks of the receiver DSP, thus lowering the energy consumption of the digital coherent receiver and increasing the tolerance against fast wavelength drifts of the lasers. We prototyped the proposed carrier recovery in a commercial field-programmable gate array (FPGA) for real-time evaluation with differential phase shift keying (DPSK) data at 1.25 Gb/s. The optical transmission system implemented direct-phase modulation of commercial DFB lasers, 25 km of single-mode fiber, and a coherent intradyne receiver with low-cost optical front-end based on 3×3 coupler and three photodiodes providing phase-diversity operation. Results show high performance in real time for DPSK, achieving -55 dBm sensitivity at BER = 10 -3 in a 6.25 GHz spaced ultra-dense wavelength-division multiplexing grid, high tolerance to optical phase noise, and enhanced mitigation of the fast wavelength drifts from lasers enabled by feedforward DSP correction and feed-back local oscillator automatic tuning. |
Abstract:
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Peer Reviewed |
Matèries:
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal -Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica -Signal processing -Optical communications -Carrier recovery -Differential optical coherent detection -Digital signal processing -Frequency estimation -Phase shift keying -Processament digital -Comunicacions òptiques |
Drets:
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Tipus de document:
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Article - Versió presentada Article |
Publicat per:
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Institute of Electrical and Electronics Engineers (IEEE)
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