VPIphotonics – Modulation Multilevel

  • 112 Gb/s PolMux QPSK System with Coherent Detection & DSP


    Illustrates the principle of coherent detection and digital signal processing (DSP) for a coherent 112Gb/s QPSK signal.

    Picture for 112 Gb/s PolMux QPSK System with Coherent Detection & DSP

    » Keywords: QPSK, CMA FIR, Polarization Multiplexed, DSP, Coherent, PolMux, Viterbi Phase Estimator, MSPE
    » Available in: Optical System Demos

  • 8-PAM 28 Gbaud Optical Ethernet System


    Example of 8-PAM modulation of EML at 28Gbaud for Optical Ethernet applications.

    Picture for 8-PAM 28 Gbaud  Optical Ethernet System

    » Keywords: 40G, 100G, EML, Optical Ethernet, Direct Modulation, PAM
    » Available in: Optical System Demos

  • 80 Gb/s Coherent OFDM Scheme without PLL


    Heterodyne detection of high-bit rate optical OFDM signal.

    Picture for 80 Gb/s Coherent OFDM Scheme without PLL

    » Keywords: Coherent, Heterodyne, OFDM
    » Available in: Optical System Demos

  • D8PSK with Direct Detection and Multilevel Thresholding


    This setup demonstrates an MZI-based D8PSK direct detection receiver with two four-level outputs. Since the detector produces multilevel signals, standard non-referenced clock recovery modules cannot be used here. The clock recovery is performed by the Retime module, compensating the delay between the incoming signal and sinusoidal clock, which is sufficient for optimal sampling.

    Picture for D8PSK with Direct Detection and Multilevel Thresholding

    » Keywords: PSK, Monte Carlo, Clock, D8PSK, Direct Detection, Retime, BER
    » Available in: Optical System Demos

  • DSP-unit for 200Gb/s DP-16QAM


    DP-16QAM-based 200G transmission including digital signal processing.

    Picture for DSP-unit for 200Gb/s DP-16QAM

    » Keywords: 16QAM, Coherent, Digital Signal Processing, DSP
    » Available in: Lab Expert Demos, Optical System Demos

  • Terabit Superchannel Based on Multi-Carrier DP-32QAM


    Spectral efficient (8.3 bit/s/Hz) Terabit superchannel (3 carriers) using dual-polarization, 32QAM modulation and Nyquist filtering.

    Picture for Terabit Superchannel Based on Multi-Carrier DP-32QAM

    » Keywords: Terabit, superchannel, DSP, BPS, 32QAM, MIMO, 400G
    » Available in: Optical System Demos

  • Dual-drive I-Q Modulator with Nonlinear Electrical Drive


    Shows a model of a dual-drive integrated IQ modulator.

    Picture for Dual-drive I-Q Modulator with Nonlinear Electrical Drive

    » Keywords: IQ, DPSK, Nonlinear, DQPSK, Transmitter
    » Available in: Optical System Demos

  • MLSE Receiver for High-Speed PAM Transmission




    Picture for MLSE Receiver for High-Speed PAM Transmission

    » Keywords: ROP, Viterbi, CD, chirp, ISI, multilevel, MLSE, BER, PAM, DFB
    » Available in: Optical System Demos

  • Principle Stokes Vector Modulation with Direct Detection


    This demonstration illustrates the Stokes vector modulation combined with direct-detection receivers.

    Picture for Principle Stokes Vector Modulation with Direct Detection

    » Keywords: Ndim, Stokes, N-dimensional, Modulation, DSP, Vector, Direct Detection, BER, 3D
    » Available in: Optical System Demos

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