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


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.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
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Event Title: 2013 Conference on Lasers and Electro-Optics Europe / International Quantum Electronics Conference
Event Type: Other
Event Dates: 2013-05-12 - 2013-05-16
Uncontrolled Keywords: Instrumentation,Atomic and Molecular Physics, and Optics
ISBN: 978-1-4799-0593-5, 978-1-4799-0594-2
Last Modified: 04 Jan 2024 17:24
Date Deposited: 30 Sep 2014 14:25
Full Text Link: http://ieeexplo ... rnumber=6800973
http://www.scop ... tnerID=8YFLogxK
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2013
Authors: Karakuzu, Huseyin
Dubov, Mykhaylo (ORCID Profile 0000-0002-6764-683X)
Boscolo, Sonia (ORCID Profile 0000-0001-5388-2893)



Version: Accepted Version

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