1 中国科学院苏州纳米技术与纳米仿生研究所纳米真空互联实验站, 江苏 苏州 215123
2 材料科学姑苏实验室, 江苏 苏州 215123
研制具有实用价值的超导量子系统需要进一步提高量子比特的质量, 目前材料及核心表界面缺陷是限制量子比特相干时间的重要因素。微波谐振器作为超导量子芯片的重要组成部分, 可用于表征材料质量及相关器件制备工艺优劣。利用分子束外延 (MBE) 技术在本征硅 (111) 衬底上生长铝 膜, 制备 λ/4 共面波导谐振器。通过硅衬底的处理和高质量铝薄膜的制备, 在 20 mK 的温度和近单光子探测功率下将谐振器本征品质因子提升到 106。
量子电子学 共面波导谐振器 低损耗 品质因子 单光子 quantum electronics coplanar waveguide resonator low loss quality factor single photon
Center for Photonics and Electronics, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
Pumping combiner is a kernel component of high power fiber laser (HPFL). We demonstrate two types of tapered fiber bundle (TFB) end-pumping combiner able to combining multi-kilowatts of pumping laser. After the experimental test of coupling performance, the 3_1 coupler is proved to have a power handling capacity of 2.11 kW with a coupling efficiency of 95.1%, and the 7_1 coupler is capable of handling pumping power of 4.72 kW with a coupling efficiency of 99.4%. These two coupler have obtained the ability to be used in laser diodes (LDs) direct beam combining and the pumping coupling of multikilowatts level fiber lasers.
high power fiber laser (HPFL) high power fiber laser (HPFL) pumping combiner pumping combiner tapered fiber bundle (TFB) tapered fiber bundle (TFB) Frontiers of Optoelectronics
2016, 9(2): 301
