1．5μm质子交换铌酸锂光波导TE_0模偏振器

1. 5μm TE_0-Pass Optical Waveguide Polarizers Fabricated in LiNbO_3 by Proton Exchange

在１．５μｍ光波长，首次研制出质子交换铌酸锂光波导ＴＥ０模偏振器。器件由嵌在Ｔｉ扩散波导之间的一段质子交换波导构成，器件长度为２ｍｍ。实验测得，偏振器的消光比和带尾纤插入损耗分别为４２ｄＢ和４．３ｄＢ。

t 1. 5 μm wavelength, TE0 optical waveguide polarizers have been fabricated in LiNbO3 by proton exchange for the first time. The polarizer consists of a short proton exchanged waveguide segment between the segments of a discontinuous Ti-indiffused waveguide. The length of the polarizers is 2 mm. The measured polarization-extinction ratio and fibre-coupled insert loss of the polarizers are 42 dB and 4. 3 dB, respectively.