液晶网络是由液晶聚合物单体适度交联得到，兼具有聚合物的弹性和液晶的各向异性，包括多刺激响应能力、可逆的驱动以及可编程的形状变形等性能，因此具有良好的外场响应性、分子协同作用和弹性。氧化石墨烯膜层具有优秀的光热转换性能，而光具有环保性、远程可控性等优异的特性，因此光致形变的氧化石墨烯/液晶网络（GO-LCNs）复合膜逐渐成为人们的研究热点。它可以制作柔性机器人、仿生光热驱动器等先进器件，具有良好的发展前景。本文在两种厚度的液晶网络膜上制作氧化石墨烯薄膜，构成氧化石墨烯/液晶网络复合膜，测量了温度或红外光作用下液晶网络膜厚度对其响应性能的影响。本文结果为复合膜的应用设计提供了实验基础，并以此为基础设计了GO-LCNs复合膜的仿生器件。
液晶网络 氧化石墨烯 仿生应用 liquid crystal network graphene oxide biomimetic application
为了通过实验得到向列相液晶材料的双折射率，利用迈克尔逊干涉原理设计了一种新的测量方法。在迈克尔逊干涉仪中放入楔形液晶盒，通过调节入射光的偏振方向分别实现了对寻常光和非寻常光折射率的精确测定。结果表明，该测量方法将折射率测量转换为长度的测量和干涉条纹的计数，简单易行、测量精度较高，对理论研究和实际开发液晶显示器件是非常重要的，在液晶材料和液晶器件生产中具有一定的推广价值。
测量与计量 双折射率 迈克尔逊干涉原理 向列相液晶 楔形液晶盒 measurement and metrology birefringence Michelson interference principle nematic liquid crystal wedge-shaped liquid crystal cell
Xin Ding 1,2,3,*Yue Zou 1,2,3Lei Zou 1,2,3Hongmei Ma 1,2,3[ ... ]Jianquan Yao 1,2,3
Author Affiliations
Abstract
1 College of Precision Instrument and Opto-Electronics Engineering, Institute of Laser and Opto-Electronics, Tianjin University
2 Key Laboratory of Opto-Electronics Information Science and Technology, Ministry of Education
3 Cooperated Institute of Nankai University and Tianjin University, Tianjin 300072
An all-solid-state quasi-continuous-wave dispersion cavity tunable Ti:sapphire laser pumped by a laser diode pumped frequency-doubled Nd:YAG laser is reported. Using a dense flint glass prism as the dispersion element, a tuning range from 730 to 880 nm with the linewidth of 3 nm and the pulse width of 17.2 ns was obtained. The maximum output power of this laser system was 5.6 W at 786.3 nm corresponding to an optical-to-optical conversion efficiency of 25.5% under the pump power of 22 W.
140.3580 lasers solid-state 140.3590 lasers titanium 140.3480 lasers diode-pumped 140.3410 laser resonators Chinese Optics Letters
2006, 4(2): 0296
Lei Zou 1,2,3,*Xin Ding 1,2,3Yue Zou 1,2,3Hongmei Ma 1,2,3[ ... ]Jianquan Yao 1,2,3
Author Affiliations
Abstract
1 College of Precision Instrument and Opto-Electronics Engineering, Institute of Laser and Opto-Electronics, Tianjin University, Tianjin 300072
2 Key Lab of Opto-Electronics Information Science and Technology, Ministry of Education, Tianjin 300072
3 Cooperated Institute of Nankai University and Tianjin University, Tianjin 300072
This paper reports a high power, all-solid-state, quasi-continuous-wave tunable Ti:sapphire laser system pumped by laser diode (LD) pumped frequency-doubled Nd:YAG laser. The maximum tuned output power of 4.2 W (797 nm) and tuned average power of 3.7 W were achieved when fixing the Ti:sapphire broadband output power at 5.0 W and applying 750-850 nm broadband coated mirror.
140.3590 lasers titanium 140.3600 lasers tunable 140.3480 lasers diode-pumped 140.3580 lasers solid-state 140.3540 lasers Q-switched Chinese Optics Letters
2005, 3(4): 04208
