Scalable ultra-wideband pulse generation based on silicon photonic integrated circuits

Xinru Wu, Ke Xu*, Wen Zhou, Chi-Wai Chow, Hon Ki Tsang

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We demonstrate a scalable ultra-wideband (UWB) pulse generator using silicon photonic integrated circuits. A delay-and-superimpose principle for higher order UWB Guassian pulse generation is realized by monolithically integrating a pair of tunable microring resonators, a delayline waveguide, tap couplers, and an on-chip photodiode. The two microrings function as discrimination filters and generate the asymmetric monocycle pulses. For a proof-of-concept demonstration, the doublet pulses with a 10-dB fractional bandwidth of 100% and the triplet pulses with a 10-dB fractional bandwidth of 132% are generated by superposition of the two asymmetric pulses with a proper delay between them. The proposed scheme and the photonic chip can be scaled to generate more kinds of powerefficient pulses.

Original languageEnglish
Article number8048032
Pages (from-to)1896-1899
Number of pages4
JournalIEEE Photonics Technology Letters
Volume29
Issue number21
DOIs
StatePublished - 1 Nov 2017

Keywords

  • photonic integrated circuits
  • silicon photonics.
  • Ultra-wideband

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