Sampling of a periodic pulse train by a modulator in a ring resonator

Janosch Meier; Arijit Misra; Stefan Preußler; Thomas Schneider

doi:10.1117/12.2577730

5 March 2021 Sampling of a periodic pulse train by a modulator in a ring resonator

Janosch Meier, Arijit Misra, Stefan Preußler, Thomas Schneider

Proceedings Volume 11713, Next-Generation Optical Communication: Components, Sub-Systems, and Systems X; 117130P (2021) https://doi.org/10.1117/12.2577730
Event: SPIE OPTO, 2021, Online Only

Conference Poster

Abstract

Overcoming bandwidth limitations is of immense interest in optical signal processing. We propose to use a Mach-Zehnder modulator inside an integrated ring, which multiplies the same signal multiple times with sampling pulses of different time shifts, leading to higher sampling rates. In proof-of-concept experiments with a fiber ring, we have realized the sampling of an optical periodic pulse train (signal) by a multiplication with sampling pulses with 2.7 times the bandwidth of the modulator driving signal. This was achieved by applying an electrical multitone signal to the modulator with a frequency spacing close to the fundamental resonance of the ring. The modulator converts the electrical multitone signal into optical sampling pulses and the consecutive multiplication of these pulses with the signal to sample at slightly shifted positions enables very short pulses. The frequency mismatch between the multitone signal and the ring resonance ensures that the frequency components of the sampling pulses are not distorted by the frequency selectivity of the ring. The setup operates like a row of cascaded modulators driven with time-shifted sampling pulses. The method might enable an accurate waveform characterization for high-bandwidth optical periodic pulse trains.

Conference Presentation

Citation Download Citation

Janosch Meier, Arijit Misra, Stefan Preußler, and Thomas Schneider "Sampling of a periodic pulse train by a modulator in a ring resonator", Proc. SPIE 11713, Next-Generation Optical Communication: Components, Sub-Systems, and Systems X, 117130P (5 March 2021); https://doi.org/10.1117/12.2577730

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