Broadband wavelength converters with flattop responses based on cascaded second-harmonic generation and difference frequency generation in Bessel-chirped gratings

Tao Liu, Ivan B. Djordjevic, Zekun Song, Ying Chen, Rongxiang Zhang, Ke Zhang, Wei Zhao, Baogang Li

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We investigate ultra-broadband wavelength converters based on cascaded second-harmonic generation and difference frequency generation using Bessel-chirped gratings (BCGs) in lithium niobate waveguides, and compare them to the ones using uniform grating and segmented grating, respectively. For the same length and power, the BCGs show broader bandwidth than the other two types of grating. The ripple of the matching response is very small as well. Analysis also shows that almost the same conversion bandwidth and maximum conversion efficiency with tolerant response flatness can be achieved when the manufacturing tolerance of the waveguide length is smaller than 0.1 cm.

Original languageEnglish (US)
Pages (from-to)10946-10955
Number of pages10
JournalOptics Express
Volume24
Issue number10
DOIs
StatePublished - May 16 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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