Integrated Reconfigurable Coherent Transmitter Driven by Binary Signals

Fresi, Francesco; Bontempi, F.; Malacarne, Antonio; Meloni, G.; Andriolli, N.; Klamkin, Jonathan; Potì, L.; Contestabile, G.

doi:10.1109/jstqe.2015.2437833

Cited by 4 publications

(6 citation statements)

References 17 publications

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“…MZ1 can be biased either at a maximum (referred to as in-phase biasing condition) or a minimum (out-of-phase biasing) of its transfer function. More details on this are provided in Section III of this paper and in our previous work [11]. In the same way, in the bottom arm (B-arm) MZ2 provides a second 4APSK, corresponding to the quadrature component.…”

Section: Operation Principlementioning

confidence: 99%

“…1 shows the scheme of the proposed RN-MZI. A detailed description of the operation principle is reported in [11], including numerical analysis to predict the system behavior and discussions about the impact of possible sub-optimum settings in real implementations. The device comprises four phase modulators (L 1 , L 2 , L 3 , L 4 ) embedded in a double-nested MZI, and tunable optical splitters/couplers (TC).…”

Section: Operation Principlementioning

confidence: 99%

“…The tool also takes into account for additional spurious amplitude modulation occurring along the phase modulators. In [11] the model was exploited to investigate in details the potential and critical aspects of the RN-MZI, analyzing the behavior of the system when deviating some parameter from the ideal values. In particular that analysis focused on the deviation of driving signals' peak-to-peak voltage V pp from V π , the impact of splitting ratio inaccuracy and spurious amplitude modulation along the phase modulators: in the case V pp deviates from V π , the resulting phase shift is not sufficient enough to rotate the four phasors as desired and this induces a residual offset in the constellation.…”

Section: Numerical Simulationsmentioning

confidence: 99%

“…The relative bias difference is optimized to impose π/2 relative phase to compose the QPSK constellation. The generated signal is received exploiting coherent detection as in [11], measuring bit error rate (BER). Noise loading has been applied to evaluate performance under different OSNR conditions, and generation and detection of QPSK signal with BER < 10 -3 has been demonstrated up to 28 Gbd in both T-arm (MZ1) and the B-arm (MZ2).…”

Section: B Qpsk Modulation Experimentsmentioning

confidence: 99%

“…Moreover, the presence of tunable optical splitters in [10] allows energy-efficient offset-free 16-QAM generation and minimize the required phase modulators. In [11], the proposed architecture has been monolithically integrated on a InP platform. However, the high spurious amplitude modulation occurring in p-n junction-based phase modulators limited the capabilities of the circuit so much so that only QPSK modulation was successfully demonstrated.…”

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confidence: 99%

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Reconfigurable Silicon Photonics Integrated 16-QAM Modulator Driven by Binary Electronics

Fresi

Malacarne

Sorianello

et al. 2016

IEEE J. Select. Topics Quantum Electron.

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A novel silicon photonics integrated reconfigurable nested Mach-Zehnder interferometer including tunable splitters and four independent phase modulators has been designed and fabricated. The architecture enables the generation of offset-free phase-amplitude constellations such as QPSK and 16-QAM by employing simple binary signals with equal peak-to-peak amplitude. The adoption of tunable splitters introduces novel features such as reconfiguration of the output constellation without modification of the RF waveform settings, as well as compensation for imperfections related to fabrication tolerances. The solution presented in this paper is based on travelling wave MZIs and thermally tunable splitters based on doped rib waveguides heated by Joule effect. The scheme minimizes the complexity of the employed architecture together with one of the driving signals. Numerical analysis has been also conducted to better investigate the system behavior and parameter optimization, evaluating the impact of suboptimum settings that might occur in a real implementation. Experimental results show the generation of QPSK signals up to 28 Gbd and 16-QAM signals up to 20 Gbd with measured bit error rate below the conventional FEC level

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Section: Operation Principlementioning

confidence: 99%

Section: Operation Principlementioning

confidence: 99%

Section: Numerical Simulationsmentioning

confidence: 99%

Section: B Qpsk Modulation Experimentsmentioning

confidence: 99%

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confidence: 99%

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