Direct laser written waveguide coupler with an optically tunable splitting ratio

M. Ams*, R. J. Williams, M. J. Withford

*Corresponding author for this work

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

1 Citation (Scopus)
14 Downloads (Pure)

Abstract

The femtosecond laser direct-write technique was used to create a 2x2 single-mode waveguide coupler in Yb-doped borosilicate glass. Initial modelling demonstrates that a reversible change in splitting ratio at 800 nm of more than 20% is possible (i.e. 50:50 to 30:70) if a shift in refractive index of the order of 1×10-4 can be induced. Such a shift is expected to be achieved through resonant optical excitation at 976 nm of the ytterbium ions, which increases the refractive index through heating and the direct pumping of a saturable optical absorption.

Original languageEnglish
Title of host publicationFrontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI
EditorsAlexander Heisterkamp, Joseph Neev, Stefan Nolte
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1-5
Number of pages5
Volume7925
ISBN (Print)9780819484628
DOIs
Publication statusPublished - 2011
EventFrontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI - San Francisco, CA, United States
Duration: 23 Jan 201126 Jan 2011

Other

OtherFrontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI
CountryUnited States
CitySan Francisco, CA
Period23/01/1126/01/11

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