半导体可饱和吸收镜作为被动锁模吸收体实现超短脉冲可见激光发展状况

介绍了当前国际上流行的一种用于固体激光器被动锁模以获得皮秒和飞秒宽度脉冲的新型半导体吸收体-半导体可饱和吸收镜的基本原理和制作方法.描述了利用半导体可饱和吸收镜和倍频晶体获得可见光超短脉冲激光方面的研究现状, 指出半导体可饱和吸收镜的使用将会加速超短脉冲三基色激光器的研制进程

980nm单模波长稳定半导体激光器的制备方法

 本发明提供一种980nm单模波长稳定半导体激光器的制备方法,包括如下步骤：步骤1：取一镓砷衬底；步骤2：在镓砷衬底上依次制备N型铝镓砷下限制层、下波导层、量子阱层、上波导层、第一P型上限制层、刻蚀截至层、第二P型上限制层和P型帽层；步骤3：采用光刻技术,在P型帽层的表面制备出刻蚀的掩膜图形；步骤4：在P型帽层上向下刻蚀,形成脊形波导结构,同时在脊形波导结构上面的一侧沿纵向刻蚀形成多个非周期分布的刻槽结构,刻蚀深度到达刻蚀截至层的表面,完成器件的制备

光纤放大器种子源模块

一种光纤放大器种子源模块，包括：一激光器封装盒，一盒盖，盖合于激光器封装盒的开口处；一光纤输出半导体激光器，沿长度方向的一侧面内有两个电极，用于接入电源；一泵浦耦合系统，为圆柱体，该泵浦耦合系统固定在激光器封装盒端面的孔洞内；一热沉，为矩形体，该热沉固定在激光器封装盒内的底部靠近泵浦耦合系统的一侧；一声光调Q开关，为矩形体，该声光调Q开关固定在一热沉上，该热沉固定在激光器封装盒内底部的中间；一调谐架，该调谐架为一L型，该调谐架固定在激光器封装盒内底部，靠近声光调Q开关的另一侧；一光纤耦合器，为椭圆盘状，该光纤耦合器固定在激光器封装盒另一端面的孔洞内

蟾蜍内酯类3-表异构体的立体特异性葡萄糖醛酸化研究

Bufadienolides, a class of natural products with a unique steroidal skeleton were separated and identified from traditional Chinese medicine Chansu, has been reported with Na+-K+-ATPase inhibitory effects and outstanding antitumor activities. In the current study, the glucuronidation of three pairs of bufadienolide epimers including Cinobufagin (CB), deacetylcinobufagin (DCB) and bufalin (BF), as well as their corresponding 3-epimers (ECB, EDCB and EBF), were investigated by using human liver microsomes (HLM). Interestingly, among these investigated compounds, only EDCB and EBF can form corresponding glucuronidated metabolite when the substrate was incubated with HLM in the presence of UDPGA, while no metabolites of CB, DCB, BF or ECB were detected under the same conditions. The EDCB mono-glucuronide and EBF mono-glucuronide were characterized by using LC-MS/MS, and these two glucuronidated metabolites were also confirmed by hydrolysis with β-glucuronidase. Further investigation on EDCB glucuronidation in human liver microsomes was carried out, due to the detection limitation for quantification of EBF glucuronide. A combination of assays with a panel of recombinant human UGT isoform(s) and chemical inhibition study were used to explore the involved isoform(s) in the EDCB glucuronidation, only UGT2B7 exhibited the catalytic activity toward EDCB glucuronidation, while the inhibitory effect of mefanamic acid (a potent inhibitor of UGT2B7) for EDCB glucuronidation in HLM was similar to its in recombinant UGT2B7. These results revealed that human UGT2B7 was the major isoform involved in the glucuronidation of EDCB. The formation of EDCB glucuronide in pooled human liver microsomes can be well fitted to a substrate inhibition model and the kinetic parameters of EDCB glucuronidation were as follows: Km=48.4 ± 12.6 µM, Ksi=342.2 ± 95.3 µM, and Vmax=1.6 ± 0.3 nmol/min/mg of protein. In summary, this study revealed a stereoselective glucuronidation pathway to bufadienolides, and our results indicated that the structure variants of these epimers including the C-16 ester and the configuration of C-3 hydroxyl may influence the glucuronidation of bufadienolides

一种用于在光纤侧面均匀蒸镀增透膜的夹具

 本发明公开了一种用于在光纤侧面均匀蒸镀增透膜的夹具,该夹具包括上半部分和下半部分,被该夹具夹持的光纤在镀膜过程中采用公转与自转相结合的形式转动,其中该上半部分与镀膜机的旋转部件相连接,由镀膜机的旋转部件带动该上半部分转动,使该上半部分侧面夹持的光纤围绕该夹具中心转动,形成公转；该下半部分与镀膜机的机体相连接,在该上半部分转动时保持不动,由该下半部分表面的齿轮轨道迫使该上半部分中夹持光纤的部件在随该上半部分转动的同时自身同步转动,形成自转。利用本发明,减少了光纤对此波段激光的反射,提高了光纤对激光器的准直效率,提高了激光器的可靠性。同时该夹具还可用于其他柱状体物体的侧壁镀膜,具有广泛的应用价值

半导体激光器储存盒

一种半导体激光器储存盒，包括：一L型底座，其断面为L形，在L型底座较宽的一内面与断面平行，均匀挖出多个V型斜面托，并在V型斜面托之间凸起部的前后两端开出贯通的矩形槽，该V型斜面托用于激光器热沉的置放和定位；L型底座较窄的一面为底座挡板；一L型顶盖，其断面为L形，该L型顶盖与L型底座配套，在较宽的一内面均匀挖出多个V型斜面凹槽，并在V型斜面凹槽前后两端开出V型槽，该V型槽的宽度和深度大于V型斜面凹槽的宽度和深度；在L型顶盖中较窄的一面开有与V型斜面托数量相等的固定螺孔；所述L型顶盖扣合于L型底座

连续波500 W全固态Nd∶YAG激光器研究

研制了全国产化全固态半导体激光器(LD)抽运模块，Nd∶YAG激光输出功率达500 W。介绍了优化抽运模块结构参数的程度。从增益分布特性等方面，介绍了研究其输入-输出功率特性的实验装置，随着抽运功率的增加，Nd∶YAG激光输出以斜率效率47%线性增加，最大输出功率达到575 W，光-光转换效率达26.1%。采用He-Ne激光探测法实验测量了该抽运模块中的热透镜效应。通过测量热焦距，分析了其热透镜效

晶圆表面脱液处理装置

一种晶圆表面脱液处理装置，其特征在于，其中包括：一卡口部，为空心柱体，其一端沿柱体的中心横向开有一贯通的矩形凹槽，该卡口部用于与其他高速离心旋转装置接合；一晶圆托，为盘状，一面为凸起部，另一面为凹部，该晶圆托的凸起部的中心与卡口部的未开有矩形凹槽的一端固接，该晶圆托用于放置晶圆