机构

• 长春光学精密机械与物... [2]
• 海洋研究所 [1]

采集方式

• OAI收割 [3]

内容类型

• 会议论文 [2]
• 期刊论文 [1]

发表日期

• 2019 [1]
• 2005 [1]
• 2004 [1]

学科主题

筛选

浏览/检索结果: 共3条，第1-3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 Cumulative impact of long-term intensive mariculture on total and active bacterial communities in the core sediments of the Ailian Bay, North China 期刊论文  OAI收割 SCIENCE OF THE TOTAL ENVIRONMENT, 2019, 卷号: 691, 页码: 1212-1224 作者:  Liang, Yantao;  Zhang, Yongyu;  Zhou, Chao;  Li, Hongmei;  Kang, Xuming   |  收藏  |  浏览/下载：52/0  |  提交时间：2020/03/20 Bacterial community  Mariculture  Total and active  Core sediments  MiSeq sequencing   High-power InGaAs/GaAs VCSEL's two-dimension arrays (EI CONFERENCE) 会议论文  OAI收割 ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China 作者:  Liu Y.;  Wang L.-J.;  Wang L.-J.;  Liu Y.;  Liu Y. 收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25 Selectively oxidized InGaAs/GaAs vertical -cavity surface-emitting lasers (VCSEL) array at an emission wavelength of 980nm was reported. A 16 elements array with 200m aperture size (250m center spacing) of individual elements shows a CW output power of 1.21 W at room temperature  resulting in 1 KW/cm2 average optical power density. The device threshold current is 1.32A The lasing peak wavelength is 981.9 nm  the full width at half-maximum is 0.7 nm  and the far-field divergence angle is about 17.The characteristics of a single device with a active region diameter of 800m is compared with that of a 2-D array with active region diameter of individual clement of 200m. These two kinds of devices have the same total lasing area. At the same current injection  the single device has a higher threshold and a higher output power than the array. The red shift of single device is more obvious than that of the array's.   Study on optical parts of MOEMS optical switch with low insertion loss (EI CONFERENCE) 会议论文  OAI收割 MEMS/MOEMS Technologies and Applications II, November 10, 2004 - November 12, 2004, Beijing, China 作者:  Wang W.;  Wang L.;  Wang L.;  Wang L.;  Chen W. 收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25 We study insertion losses of optical switch when the laser beam is propagating during the free space between two single mode fibers (SMFs) and the related assemblage challenges  Then a new packaging structure is developed for the hybrid-integration of free-space MOEMS (micro-opto-electro-mechanical systems) chip with a silicon micromachined submount to improve alignment accuracy. The submount is designed to accommodate various free-space MOEMS chips with minimal active optical alignment  thus reducing the packaging cost. The silicon submount has a central recess to place the MOEMS chip in  sixteen V-grooves for optical fibers  and micropits for micro ball lenses  all bulk micromachined at the same time by a single anisotropic wet etching step. A corner compensation technique is employed to prevent erosion of the convex corners  where different geometries meet. Through this assembling method  the fiber  micro ball lens can be aligned preciously thus reduced lateral and angular misalignment between them. Then total insertion losses can be decreased.