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This paper proposes a novel optical sampling technique for monitoring ultrafast signal waveforms. The dual-channel sampling system, which employs two parallel interferometers offset by a slight relative delay, enables us to observe not only intensity but also phase (frequency) modulation without any restriction as regards signal coherence. The proposed method, based on linear interaction with local...
This paper describes a novel detection technique for WDM signals using ultrafast field sampling with a multi-channel linear optical sampling system, and successfully demonstrates simultaneous monitoring of two channel signals.
We demonstrate the ultrafast observation of the complex polarization components by using a multi-channel linear optical sampling technique. Simultaneous characterization of the temporal waveform and the PMD provides a unique feature for diagnosing high-speed channels.
A novel timing recovery for read channel systems which has an asynchronous full-digital architecture is presented. The most important point is that an adaptive oversampling rate controller is employed to keep its oversampling rate constant
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