机构

• 长春光学精密机械与物... [1]
• 上海光学精密机械研究... [1]

采集方式

• OAI收割 [2]

内容类型

• 会议论文 [1]
• 期刊论文 [1]

发表日期

• 2010 [1]
• 2008 [1]

学科主题

• 光学材料;光学玻璃 [1]

筛选

浏览/检索结果: 共2条，第1-2条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Theoretical analysis of emission characteristics of second-order distributed feedback semiconductor lasers (EI CONFERENCE) 会议论文  OAI收割 Semiconductor Lasers and Applications IV, October 18, 2010 - October 19, 2010, Beijing, China 作者:  Liu Y.;  Liu Y.;  Qin L.;  Liu Y.;  Wang L. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 Based on the modified coupled-wave theory  the emission characteristics  including threshold gain  photon density distribution in the cavity  and external differential quantum efficiency for second-order DFB lasers are investigated. Numerical simulation results show that for given device structure with wavelength of 1.55 m  the feedback coupling coefficient and the surface radiation coupling coefficient of the second-order grating have great influence on the emission characteristics of the device. By choosing different duty cycles of the grating  we can change the two coupling coefficients  which affect the emission characteristics. For an overall consideration  an optimal duty cycle of 0.43 is chosen. The optimized results show that the device works without degeneracy modes and spatial burning hole. Besides  the side-mode suppress ratio (SMSR) and external differential quantum efficiency reach as high as 42 dB and 47%  respectively. 2010 SPIE.   808 nm 抽运的Ho3+，Tm3+及Er3+掺杂的氟磷酸盐玻璃的2.0 μm 光谱性质研究 期刊论文  OAI收割 光子学报, 2008, 卷号: 37, 期号: s1, 页码: 22, 25 衣丽霞; 王孟; 张丽艳; 汪国年; 胡丽丽; 张军杰 收藏  |  浏览/下载：1279/235  |  提交时间：2009/09/24 Cross relaxations  Doped fluorophosphate glass  Emission cross sections  Er3+  Fluorophosphate glasses  Gain coefficients  Ho3+  J-o theories  Potential materials  Rare earth ions  Spectroscopic properties  Spontaneous transition probabilities  Tm3+  Transfer mechanisms