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内腔四程放大高功率激光系统寄生振荡 被引量:5
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作者 王方 粟敬钦 +4 位作者 王文义 胡东霞 周维 刘兰琴 莫磊 《强激光与粒子束》 EI CAS CSCD 北大核心 2009年第8期1183-1186,共4页
基于小信号增益公式、菲涅耳反射公式和判断内腔四程放大高功率激光系统寄生腔增益与损耗大小,研究了2个光路构型相似,寄生腔构成相近的高功率固体激光装置(装置A和装置B)的系统寄生振荡问题:首先指出了系统中存在可能起振的3个寄生腔,... 基于小信号增益公式、菲涅耳反射公式和判断内腔四程放大高功率激光系统寄生腔增益与损耗大小,研究了2个光路构型相似,寄生腔构成相近的高功率固体激光装置(装置A和装置B)的系统寄生振荡问题:首先指出了系统中存在可能起振的3个寄生腔,然后分析了3个寄生腔中影响损耗的各个因素,根据装置A上的实验结果,判断在仅通过钕玻璃片检偏的情况下,装置B的第3寄生腔存在产生寄生振荡的可能性,最后采取加入一组偏振片的方法抑制寄生振荡。 展开更多
关键词 高功率固体激光 四程放大 寄生腔 寄生振荡
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Non-parasitic splenic cysts: A report of three cases 被引量:11
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作者 Macheras A Misiakos EP +3 位作者 Liakakos T Mpistarakis D Fotiadis C Karatzas G 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第43期6884-6887,共4页
Primary splenic cyst is a relatively rare disease, and the majority of cases are classified as epithelial cysts. Three cases with nonparasitic splenic cysts are presented: two epithelial and one pseudocyst. All cases ... Primary splenic cyst is a relatively rare disease, and the majority of cases are classified as epithelial cysts. Three cases with nonparasitic splenic cysts are presented: two epithelial and one pseudocyst. All cases had an atypical symptomatology, consisted mainly of fullness in the left upper abdomen and a palpable mass. Preoperative diagnosis was established with ultrasonography and computerized tomography. Two cases with large cysts located in the splenic hilum were treated with open complete splenectomy. The most recent case, a pseudocyst, was managed laparoscopically with partial cystectomy. All cases did not have any problems or recurrence during follow-up. Laparoscopic partial cystectomy is an acceptable procedure for the treatment of splenic cysts, because it cures the disease preserving the splenic tissue. Complete splenectomy is reserved for cases in which cyst excision cannot be done otherwise. 展开更多
关键词 SPLEEN Epithelial cyst SURGERY LAPAROSCOPY
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