[caption id="attachment_3119" align="alignleft" width="300"]
Constellation-and-eye-diagram-qpsk[/caption]
This paper depicts the strong contribution of the Apex Technolgoies Optical Complex Spectrum Analyser AP2441B/AP2443B in characterising and evaluating 43 Gb/s DQPSK (Differential Quadrature Shift Keying) modulators thanks to its ability to display the phase eye pattern and the constellation. Low-drive-voltage (3.5 V) and uniform modulation characteristics of MZIs (Mach Zehnder Modulators) were achieved with Z-cut dual-drive nested-MZIs structure and the wide-gap design between signal and ground electrodes, resulting in precise constellation mappings in 43 Gb/s DQPSK modulation.
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Constellation-and-eye-diagram-qpsk[/caption]
This paper depicts the strong contribution of the Apex Technolgoies Optical Complex Spectrum Analyser AP2441B/AP2443B in characterising and evaluating 43 Gb/s DQPSK (Differential Quadrature Shift Keying) modulators thanks to its ability to display the phase eye pattern and the constellation. Low-drive-voltage (3.5 V) and uniform modulation characteristics of MZIs (Mach Zehnder Modulators) were achieved with Z-cut dual-drive nested-MZIs structure and the wide-gap design between signal and ground electrodes, resulting in precise constellation mappings in 43 Gb/s DQPSK modulation.
Click here for more information