Polarization mode converters in ZnO-diffused LiNbO3 waveguides

James E. Toney; Jason Retz; Andrea Pollick; Vincent E. Stenger; Sri Sriram

doi:10.1117/1.OE.58.8.082420

13 June 2019 Polarization mode converters in ZnO-diffused LiNbO₃ waveguides

James E. Toney, Jason Retz, Andrea Pollick, Vincent E. Stenger, Sri Sriram

Author Affiliations +

Optical Engineering, Vol. 58, Issue 8, 082420 (June 2019). https://doi.org/10.1117/1.OE.58.8.082420

Abstract

The linear electro-optic effect in lithium niobate is capable of realizing a variety of polarization transformations, including TE-to-TM and left-to-right circular polarization conversion. Several types of devices have been demonstrated in Ti-diffused waveguides. LiNbO₃ devices have historically been based on either Ti-diffused or proton-exchanged waveguides. The proton-exchanged waveguides only guide light polarized along the optic axis, and therefore, are not applicable to polarization transforming devices. Zinc oxide diffusion is an alternative waveguide fabrication technology that guides both e- and o-waves with much higher power-handling capability than Ti : LiNbO₃ waveguides. ZnO : LiNbO₃ waveguides exhibit a highly circular mode field with lower anisotropy than Ti-diffused waveguides. We report the design, fabrication, and testing of ZnO : LiNbO₃ devices for polarization mode conversion.

Citation Download Citation

James E. Toney, Jason Retz, Andrea Pollick, Vincent E. Stenger, and Sri Sriram "Polarization mode converters in ZnO-diffused LiNbO₃ waveguides," Optical Engineering 58(8), 082420 (13 June 2019). https://doi.org/10.1117/1.OE.58.8.082420

Received: 30 November 2018; Accepted: 29 May 2019; Published: 13 June 2019

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