Abstract

We measure the birefringence Δβ = βTMβTE of LiNbO3:Ti single-mode strip waveguides at λ = 1.54 μm by scanning a polarization-coupling perturbation along the guide and observing the variations of output polarization. With electro-optic and thermo-optic probing, beat lengths of 20 μm to 20 mm are measured with a resolution of up to δβ) ≈ 10−3 cm−1. Influences of temperature and strip width on Δβ are observed.

© 1995 Optical Society of America

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