报道了用脉冲激光淀积（ＰＬＤ）方法在磷酸氧钛钾（ＫＴＰ）晶体（１００）面上生长沿［１１０］取向的铌酸钡钠（ＢＮＮ）光波导薄膜。Ｘ射线衍射，扫描电子显微镜，Ｘ射线光电子能借测量表明生长的ＢＮＮ膜是外延单晶膜。膜表面粗糙度很小。光波导模式和光损耗测量表明膜具有较低的损耗。 Reported the growth of the [110] sodium barium niobate (BNN) optical waveguide film on the (100) plane of potassium titanate phosphate (KTP) by pulsed laser deposition (PLD). X-ray diffraction, scanning electron microscopy, X-ray photoelectron can be measured by the growth of the BNN film is epitaxial single crystal film. Membrane surface roughness is small. Optical waveguide mode and optical loss measurements show that the film has a lower loss.