Towards femtosecond laser written arrayed waveguide gratings

G. Douglass, F. Dreisow, S. Gross, S. Nolte, M. J. Withford

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The fabrication of arrayed waveguide gratings (AWGs) using the femtosecond laser direct-write technique is investigated. We successfully demonstrate the fabrication of large planar waveguides that act as 2D free propagation zones. These slabs were found to have a highly uniform refractive index with a standard deviation of 1.97% relative to the total index contrast. The incorporation of low loss linear adiabatic tapers resulted in an increase of transmission by 90%. Strategies for manufacturing integrated laser written AWGs using continuous contouring to avoid lossy defects are discussed and demonstrated.

Original languageEnglish
Pages (from-to)21392-21402
Number of pages11
JournalOptics Express
Volume23
Issue number16
DOIs
Publication statusPublished - 10 Aug 2015

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