Ion-exchanged Fe doped KTiOPO4 optical waveguides

Abstract

Planar and channel waveguides were fabricated in Fe doped KTiOPO4 (KTP) using the Rb+:K+ ion-exchange process. These waveguides were characterized optically. It was found that the index change is smaller than that obtained using undoped KTP substrates. However, the diffusion depth is larger. The Fe ions appear to be an effective means to modify the properties of ion-exchanged KTP waveguides. The photorefractive effect (PRE) in Fe doped KTP channel waveguides was also investigated at wavelengths of 0.543, 0.6328, and 0.83 μm. PRE was not observed, indicating that unlike that in LiNbO3 or KNbO3, Fe ion is not a major contributing factor in KTP.

Growth, structural, thermal, electrical and nonlinear optical properties of Yb3+ doped KTiOPO4

“…The vibrational lines appearing at 1047 and 1100 cm À 1 are assigned to asymmetric stretching mode of PO 4 . KTP contains two different types of titanium, denoted Ti (1) and Ti (2). Every titanium ion is coordinated with six oxygen forming TiO 6 octahedral.…”

“…Potassium titanyl phosphate (KTP) is a nonlinear electro-optical material used in integrated optics, wave guides, parametric oscillators and frequency converters [1][2][3]. The crystal has high laser damage threshold resistance, electro-optical coefficient and wide acceptance angle [4][5][6].…”