Low-loss high-extinction polarizers fabricated in LiNbO_3 by proton exchange

Abstract

TE-pass integrated optical polarizers have been fabricated in X-cut LiNbO3 by using titanium indiffusion in conjunction with proton exchange. The polarizers, which are designed to operate at λ = 0.8–0.85 μm, exhibit an excess insertion loss of 0.2 dB and a measurement-limited polarization-extinction ratio of >50 dB. These values represent a significant improvement over previously published results.