Control of the properties of micro-structured waveguides in LiNbO3 fabricated by direct femtosecond laser inscription

Huseyin Karakuzu, Mykhaylo Dubov, Sonia Boscolo

Research output: Chapter in Book/Report/Conference proceedingConference publication

Abstract

This paper reports on buried waveguides fabricated in lithium niobate (LN) by the method of direct femtosecond (fs) laser inscription. 5% MgO doped LiNbO3 was chosen as the host material because of its high quality and damage threshold, as well as relatively low cost. Direct fs inscription by astigmatically shaped beam in crystals usually produces multiple 'smooth' tracks (with reduced refractive index), which encircle the light guiding 'core', thus creating a depressed cladding WG. A high-repetition rate fs laser system was used for inscription at a depth of approximately 500 μm. Using numerical modelling, it was demonstrated that the properties of fs-written WGs can be controlled by the WG geometry. Buried, depressed-cladding WGs in LN host with circular cross-section were also demonstrated. Combining control over the WG dispersion with quasi-phase matching will allow various ultralow-pump-power, highly-efficient, nonlinear light-guiding devices - all in an integrated optics format.
Original languageEnglish
Title of host publication2013 Conference on Lasers and Electro-Optics Europe & International Quantum Electronics Conference
Place of PublicationPiscataway, NJ (US)
PublisherIEEE
Number of pages1
ISBN (Print)978-1-4799-0593-5 , 978-1-4799-0594-2
DOIs
Publication statusPublished - 2013
Event2013 Conference on Lasers and Electro-Optics Europe / International Quantum Electronics Conference - Munich, Germany
Duration: 12 May 201316 May 2013

Conference

Conference2013 Conference on Lasers and Electro-Optics Europe / International Quantum Electronics Conference
Abbreviated titleCLEO EUROPE/IQEC 2013
CountryGermany
CityMunich
Period12/05/1316/05/13

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