用于红外激光传输及光纤传感应用的矩形Y_2O_3-ZrO_2单晶光波导

通过精确的切割和良好的抛光 ,从Y2 O3 稳定的ZrO2 块状单晶制得可用于红外激光传输及光纤高温传感的高品质Y2 O3 ZrO2 单晶矩形光波导 .获得的矩形波导截面大于 1mm× 1mm ,长度在 4 5mm～ 6 5mm之间 .波导的光学性能比用常规LHPG系统生长的Y2 O3 ZrO2 单晶光纤优越得多 ,在 90 0nm波长处的光学损耗小于 0 .0 3dB cm ,对 1.0 6 μmNd :YAG激光脉冲的损伤阈值为 0 .98MW cm2 ,并且能耐受 2 30 0℃的高温 .实验结果表明 ,这些波导有望在红外激光传输和 2 0 0 0℃以上的高温光纤传感等领域得到应用 .

RECTANGULAR Y_2O_3-ZrO_2 SINGLE CRYSTAL OPTICAL WAVEGUIDES FOR INFRARED LASER DELIVERY AND FIBER-OPTIC SENSING APPLICATIONS

High quality Y2O3-ZrO2 single crystal rectangular waveguides were fabricated from bulky Y 2O 3 stabilized ZrO 2 single crystal by precise cut and fine polish with cross section larger than 1mm×1mm and length of 45mm～65mm. They show much better optical properties than Y 2O 3 ZrO 2 single crystal fibers grown by the conventional LHPG system, optical losses of the waveguides are lower than 0.03dB?cm at wavelength of 900nm, the damage thresholds are 0.98 MW?cm 2 for 1.06μm Nd:YAG laser pulses, and they are able to endure temperature as higher as 2300℃. Experimental results show that these waveguides are promising for fiber optic sensing applications at temperature above 2000℃.