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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 16 — Aug. 15, 2012
  • pp: 3318–3320

Double polarization active Y junctions in the L band, based on Ti:LiNbO3 lithium niobate waveguides: polarization and contrast performances

Samuel Heidmann, Nadège Courjal, and Guillermo Martin  »View Author Affiliations


Optics Letters, Vol. 37, Issue 16, pp. 3318-3320 (2012)
http://dx.doi.org/10.1364/OL.37.003318


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Abstract

Double polarization electro-optic beam combiners based on a Ti:diffusion lithium niobate waveguide have been developed for mid-infrared applications. A monochromatic rejection ratio of up to 33 dB at λ=3.39μm was obtained, as well as wideband fringes showing low dispersion. In a first part, studying the fringe contrast as a function of waveguide width, we found a compromise among transmission, signal-to-noise ratio, and fringe contrast, depending on the single-mode behavior of the waveguides. We will show that both polarizations are guided, and at least 70% and 90% contrast is achieved, respectively, in TE and TM with a 400 nm wideband light centered at 3.39 μm. After choosing the optimal combiner and designing the electrodes, we studied the electro-optic response of the device, using a monochromatic source and scanning the fringe, by external as well as internal modulation, in order to determine the rejection ratio and the voltage needed to cover half a fringe (Vπ) voltage for both TE and TM polarizations.

© 2012 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(130.3730) Integrated optics : Lithium niobate

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: April 18, 2012
Revised Manuscript: June 11, 2012
Manuscript Accepted: June 24, 2012
Published: August 6, 2012

Citation
Samuel Heidmann, Nadège Courjal, and Guillermo Martin, "Double polarization active Y junctions in the L band, based on Ti:LiNbO3 lithium niobate waveguides: polarization and contrast performances," Opt. Lett. 37, 3318-3320 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-16-3318

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