Design of arbitrary-order photonic temporal differentiators based on phase-modulated fiber bragg gratings in transmission

Xin Liu, Xuewen Shu*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

All-optical arbitrary-order temporal differentiators are demonstrated with phase-modulated fiber Bragg gratings (PM-FBGs) in transmission for the first time. The transmissive PM-FBGs are designed by employing a novel two-step nonlinear optimization method, which consists of unconstrained nonlinear optimization method step and constrained nonlinear optimization method step. Specifically, the first unconstrained nonlinear step is used to get appropriate parameters as input to the second step, while the second constrained nonlinear step is employed to generate more accurate result based on the output of the first step. The proposed method does not impose much restriction on the initial input parameters and also improves the result accuracy compared with previous one-step nonlinear optimization method. Examples of 0.5th-order, first-order, and second-order differentiators are designed and numerically simulated. The numerical results show that the designed PM-FBG differentiators are very accurate with a bandwidth up to 500 GHz. Moreover, the proposed method can be applied in designing arbitrary-order differentiators with the differentiation order n > 0.

Original languageEnglish
Article number7915667
Pages (from-to)2926-2932
Number of pages7
JournalJournal of Lightwave Technology
Volume35
Issue number14
Early online date2 May 2017
DOIs
Publication statusPublished - 15 Jul 2017

Keywords

  • All-optical device
  • Bragg fiber grating
  • optical processing
  • pulse shaping
  • ultrafast devices

Fingerprint Dive into the research topics of 'Design of arbitrary-order photonic temporal differentiators based on phase-modulated fiber bragg gratings in transmission'. Together they form a unique fingerprint.

  • Cite this