Towards femtosecond laser written arrayed waveguide gratings | Zendy

Glen Douglass | Zendy; Felix Dreisow | Zendy; Simon Gross | Zendy; Stefan Nolte | Zendy; Michael J. Withford | Zendy

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Towards femtosecond laser written arrayed waveguide gratings

Author(s) -

Glen Douglass,

Felix Dreisow,

Simon Gross,

Stefan Nolte,

Michael J. Withford

Publication year - 2015

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.021392

Subject(s) - femtosecond , optics , materials science , laser , fabrication , refractive index , planar , waveguide , contouring , optoelectronics , physics , medicine , alternative medicine , computer graphics (images) , pathology , engineering drawing , computer science , engineering

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.

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