Optiwave OptiSystem 13.0 OptiSystem is a comprehensive software design suite that enables users to plan, test, and simulate optical links in the transmission layer of modern optical networks. PTICAL TRANSMITTERS: 16-QAM, DP-16-QAM Two new components (16-QAM Transmitter, Optical DP-16-QAM Transmitter) have been added to the Optical Transmitters library. The 16-QAM Transmitter simulates a single channel optical transmitter with a 16-QAM modulation format. The Optical DP-16-QAM Transmitter component simulates a single channel optical transmitter with a dual polarization 16-QAM modulation format. Optical System 16-QAM Transmitter: The 16-QAM signal is generated by using MZ modulators to translate the QAM symbols onto an optical carrier. Each modulator branch modulates the in-phase (I) and quadrature components (Q) of a carrier. In the example above, an external bit stream is used to initiate the sampled data set. Figure 1: 16-QAM Transmitter: The 16-QAM signal is generated by using MZ modulators to translate the QAM symbols onto an optical carrier. Each modulator branch modulates the in-phase (I) and quadrature components (Q) of a carrier. In the example above, an external bit stream is used to initiate the sampled data set. Optical System Optical DP-16-QAM Transmitter: A polarization beam splitter is used to create two orthogonal polarization components which are modulated separately by 16-QAM transmitters (similar to Fig 1) and then combined using a polarization beam combiner. In the example above, an internal bit stream is used to initiate the sampled data set Figure 2: Optical DP-16-QAM Transmitter: A polarization beam splitter is used to create two orthogonal polarization components which are modulated separately by 16-QAM transmitters (similar to Fig 1) and then combined using a polarization beam combiner. In the example above, an internal bit stream is used to initiate the sampled data set OPTICAL RECEIVERS: Optical Coherent 16-QAM, Optical Coherent DP-16-QAM Two new components (Optical Coherent 16-QAM Receiver, Optical Coherent DP-16-QAM Receiver) have been added to the Optical Receivers library. The Coherent 16-QAM Receiver simulates an optical coherent receiver for QAM signals based on a homodyne design. The Coherent DP-16-QAM Receiver simulates an optical coherent receiver for the dual-polarization of 16-QAM signals. Optical System Optical Coherent 16-QAM Receiver Figure 3: Optical Coherent 16-QAM Receiver: The optical coherent QAM receiver involves a homodyne receiver design. The component is formed by a set of 3 dB fiber couplers, a local oscillator laser, and balanced detection (to eliminate the local oscillator intensity noise). The resulting electrical outputs are then sent to an external QAM Sequence Decoder and M-ary Threshold Detector to retrieve the original bit sequence. Optical System Optical Coherent DP-16-QAM Receiver Figure 4: Optical Coherent DP-16-QAM Receiver: The optical coherent DP-16-QAM receiver includes a local oscillator (LO) laser polarized at 45 degrees relative to the polarization beam splitter. The received signal is separately demodulated by each LO component using two single polarization 16-QAM receivers.