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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 2 — Jan. 15, 2014
  • pp: 371–374

Optical characterization of ultra-short Bragg grating on lithium niobate ridge waveguide

Clément Guyot, Gwenn Ulliac, Jean Dahdah, Wentao Qiu, Maria-Pilar Bernal, Fadi Baida, and Nadège Courjal  »View Author Affiliations


Optics Letters, Vol. 39, Issue 2, pp. 371-374 (2014)
http://dx.doi.org/10.1364/OL.39.000371


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Abstract

In this Letter, we report a technique to etch giant aspect ratio nanostructures in lithium niobate. An 8 μm long Bragg grating on a Ti:LiNbO3 ridge waveguide was fabricated by combining optical-grade dicing and focused ion beam milling. The reflectivity was evaluated using an optical coherence tomography system: it is measured to be 53% for the TM wave and 47% for the TE wave. We study by 2D-FDTD the modeled behavior of the electromagnetic field when an angle exists between two consecutive sidewalls of the grating in order to understand the difference between ideal Bragg grating and experimental samples. These simulations allow us to optimize the parameters in order to increase the reflection of the grating up to 80%.

© 2014 Optical Society of America

OCIS Codes
(130.3730) Integrated optics : Lithium niobate
(230.1480) Optical devices : Bragg reflectors
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Optical Devices

History
Original Manuscript: October 22, 2013
Revised Manuscript: December 5, 2013
Manuscript Accepted: December 10, 2013
Published: January 15, 2014

Citation
Clément Guyot, Gwenn Ulliac, Jean Dahdah, Wentao Qiu, Maria-Pilar Bernal, Fadi Baida, and Nadège Courjal, "Optical characterization of ultra-short Bragg grating on lithium niobate ridge waveguide," Opt. Lett. 39, 371-374 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-2-371


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