Temporal Talbot effect using an intensity-modulating frequency-shifting loop

Hongzhi Yang, Marc Brunel, Marc Vallet, Changming Zhao, Haiyang Zhang, Lei Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

We investigate an all-fibered frequency-shifting loop (FSL) that includes an electro-optic intensity modulator (EOM) and an optical amplifier, and is seeded by a continuous-wave laser. At variance with frequency-shifted feedback lasers that contain an acousto-optic frequency shifter (AOFS), the EOM creates at each round-trip two side-bands that recirculate inside the loop. We experimentally and theoretically investigate the time response of the FSL in the fractional Talbot condition. Experimental results show that the intensity-modulating FSL generates short pulses with a repetition rate multiplication. We observe pulses at repetition rates tunable between 5.867 MHz and 715.8 MHz. The system is also modeled by a simple linear interference model that takes the amplitude modulation function and loop delay into account. The model predicts the fractional Talbot property as in AOFS-based systems, but with an additional amplitude modulation of the pulse train, in good agreement with the experimental results. This experiment shows an alternative approach to AOFS loops, taking advantage of the inherent bandwidth and tunability of the EOM. This fractional Talbot laser may find applications in optical sampling, THz generation and ultrafast data processing systems.

Original languageEnglish
Title of host publicationOptical Sensing and Detection VI
EditorsFrancis Berghmans, Anna G. Mignani
PublisherSPIE
ISBN (Electronic)9781510634800
DOIs
Publication statusPublished - 2020
EventOptical Sensing and Detection VI 2020 - Virtual, Online, France
Duration: 6 Apr 202010 Apr 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11354
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptical Sensing and Detection VI 2020
Country/TerritoryFrance
CityVirtual, Online
Period6/04/2010/04/20

Keywords

  • Electro-optic intensity modulator
  • Frequency shifting loop
  • Talbot effect

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