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

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• 8-PAM 28 Gbaud Optical Ethernet System

  
  Example of 8-PAM modulation of EML at 28Gbaud for Optical Ethernet applications.
  
  
  
  » Keywords: 40G, 100G, EML, Optical Ethernet, Direct Modulation, PAM
  » Available in: Optical System Demos

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• 80 Gb/s Coherent OFDM Scheme without PLL

  
  Heterodyne detection of high-bit rate optical OFDM signal.
  
  
  
  » Keywords: Coherent, Heterodyne, OFDM
  » Available in: Optical System Demos

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

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• DSP-unit for 200Gb/s DP-16QAM

  
  DP-16QAM-based 200G transmission including digital signal processing.
  
  
  
  » Keywords: 16QAM, Coherent, Digital Signal Processing, DSP
  » Available in: Lab Expert Demos, Optical System Demos

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

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

  
  Shows a model of a dual-drive integrated IQ modulator.
  
  
  
  » Keywords: IQ, DPSK, Nonlinear, DQPSK, Transmitter
  » Available in: Optical System Demos

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• MLSE Receiver for High-Speed PAM Transmission

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

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• Principle Stokes Vector Modulation with Direct Detection

  
  This demonstration illustrates the Stokes vector modulation combined with direct-detection receivers.
  
  
  
  » Keywords: Ndim, Stokes, N-dimensional, Modulation, DSP, Vector, Direct Detection, BER, 3D
  » Available in: Optical System Demos

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