检索结果-南通市图书馆

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

kd*p电光调Q技术的一种新方案

量子电子学报 1987年第4期12卷 371-371页

作者：梁柱刘英冈张敏长春光机学院

本文提出一种新的调Q电路,仅用半块格兰——付科棱镜做起偏器和检偏器,使o光在腔内形成振荡,从而大大减少插入损耗,提高了动态效率和输出功率。文中对新方案和常用方案的插入损耗、激光阈值、输出功率和效率等参数进行了理论计算和比较... 详细信息

本文提出一种新的调Q电路,仅用半块格兰——付科棱镜做起偏器和检偏器,使o光在腔内形成振荡,从而大大减少插入损耗,提高了动态效率和输出功率。文中对新方案和常用方案的插入损耗、激光阈值、输出功率和效率等参数进行了理论计算和比较。并通过实验得出很理想的数据。

关键词：插入损耗正向损耗输出功率 kd*p

Anhydrous based shear-thickening polishing of kd*p crystal

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2021年第6期34卷 90-99页

作者： Min LI Minghui LIU Oltmann RIEMER Fangzeng SONG Binghai LYU Intelligent Manufacturing Institute Hunan University of Science and TechnologyXiangtan 411201China Department of Manufacturing Technologies Leibniz Institute for Materials EngineeringBremen 28359Germany Faculty of production Engineering University of BremenBremen 28359Germany

Based on the special physical–chemical characteristics of optical crystal in the field of aeronautics,a new anhydrous based shear-thickening polishing(ASTp)method has been proposed to restrain deliquescence and to improve physical properties for kd*p *** ultraprecision polishing of kd*p crystal is completed by ASTp.A kind of anhydrous based thickening polishing slurry(ATpS)was proposed in our work,and high-performance rheological properties were determined to achieve the ASTp of kd*p crystal.A material removal model of ASTp in kd*p machining is established,followed by the verification experiment of the prediction *** maximum error of the predictive model is only 9.8%,which proves the validity of the material removal model for kd*p *** polishing experiments were carried out on the polishing platform developed by *** results show that the new polishing method can polish20 mm×20 mm×5 mm kd*p crystal and obtain a super-smooth surface with a surface roughness of 1.37 nm and high shape *** surface accuracy of polished kd*p crystal reaches up to0.68 k(RMS).The experimental results show that the ASTp is a potential ultra-precision machining method for kd*p crystal.

关键词： Crystals kd*p polishing Shear thickening Surface Ultra-precision machining

Thermo-optic characterization of kd*p single crystals by a modified Snarmont setup for electro-optic modulation system

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2009年第7期7卷 632-639页

作者： H. L. Saadon M. A. Rahma Ali F. Marhoon N. Thofanous M. Aillerie Department of Informatics and Telecommunications Optoelectronics Group University of AthensPanepistimiopolis Ilisia GR-157 84 Athens Greece Department of physics College of Science University of BasrahBasrah Iraq Laboratoire Matriaux Optiques Photonique et Systmes UMR CNRS 7132 Universit de Metz et Suplec2 rue E. Belin 57070 Metz France

For our kd*p crystal orientation, various tbermo-optic （TO） and relevant temperature-dependence param- eters are defined, presented, and studied in the framework of a transverse and a longitudinal electro-optic （EO） modulation systems. This study is based on the concept of the so-called opto-electrical bias （~） ap- plied to the system. For both of the above EO-modulation systems, a set of original equations is extracted and investigated with regard to each of the more important TO or temperature coefficients. Using these equations, for these parameters the role of the transverse configuration is examined in comparison with its corresponding longitudinal configuration. A comparison is done with other orientation of the same kd*p crystal.

关键词： narmont setup for electro-optic modulation system Thermo-optic characterization of kd*p single crystals by a modified S kd*p

Raman gains of ADp and kd*p crystals

在线全文

学校读者我要写书评

暂无评论

Chinese physics B 2015年第4期24卷 227-230页

作者：周海亮张清华王波许心光王正平孙洵张芳张立松刘宝安柴向旭 State Key Laboratory of Crystal Materials Shandong University Key Laboratory of Functional Crystal Materials and Device (Shandong University) Ministry of Education College of Information Science and Engineering Shandong Agricultural University Chengdu Fine Optical Engineering Research Centre

In this paper, the Raman gain coefficients of ammonium dihydrogen phosphate （ADp） and potassium dihydrogen phosphate （kd*p） crystals are measured. By using a pump source of a 30-ps, 532-nm laser, the gain coefficients of ADp and kd*p are 1.22 cm/GW, and 0.91 cm/GW, respectively. While for a 20-ps, 355-nm pump laser, the gain coefficients of these two crystals are similar, which are 1.95 cm/GW for ADp and 1.86 for kd*p. The present results indicate that for ultra-violet frequency conversion, the problem of stimulated Raman scattering for ADp crystal will not be more serious than that for kd*p crystal. Considering other advantages such the larger nonlinear optical coefficient, higher laser damage threshold, and lower noncritical phase-matching temperature, it can be anticipated that ADp will be a powerful competitor to kd*p in large aperture, high energy third-harmonic generation or fourth-harmonic generation applications.

关键词： ADp kd*p stimulated Raman scattering gain coefficient

Effect of pressure on Thermal Stability and Decomposition of kd*p Crystal

在线全文

学校读者我要写书评

暂无评论

Chinese physics Letters 2011年第2期28卷 176-178页

作者： DING Jian-Xu WANG Tao WANG Sheng-Lai CUI De-Liang MU Xiao-Ming XU Xin-Guang State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100 Yantai Department No.52 Institute of North Industries GroupYantai 264003

Effect of pressure on thermal behavior of kd*p crystals is investigated by using the in-situ infrared reflective *** with that under normal atmosphere,the onset temperature of decomposition under pressure of 1 Mpa is improved to from 210℃to 213℃,suggesting that the thermal stability of kd*p is *** pressure of 2 Mpa,the thermal stability is deteriorated and kd*p begins to decompose at 183℃.Under normal atmosphere kd*p decomposes in route of translating to K_(4)p_(2)O_(7)firstly,and then to kd*pO_(3).Under pressures of 1 Mpa and 2Mpa,kd*p translates to kd*pO_(3)directly without any other polymeric intermediates.

关键词： spectra kd*p decompose

Characteristics of Laser-Induced Surface Damage on Large-Aperture kd*p Crystals at 351 nm

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese physics Letters 2015年第2期32卷 139-142页

作者：田野韩伟曹华保李富全冯斌赵军普郑奎兴朱启华郑万国 Research Center of Laser Fusion China Academy of Engineering Physics Graduate School of China Academy of Engineering physics

Laser-induced damage often determines the effective lifetime of an optic in large high-energy laser facilities. We present the damage performance on the rear surface of a large-aperture kd*p crystal for 351 nm, 5ns laser pulses. Surface damage shows a lower threshold than bulk damage after conditioning. Craters initiated on the scratch are found to increase with the shot number before filling the scratch. The experimental results reveal that damage initiation is mainly caused by extrinsic nanoabsorbers buried in the surface during the large-aperture laser operation.

关键词： In kd*p