机构

• 地质与地球物理研究所 [2]
• 长春光学精密机械与物... [2]
• 武汉物理与数学研究所 [1]

采集方式

• OAI收割 [5]

内容类型

• 期刊论文 [3]
• 会议论文 [2]

发表日期

• 2007 [5]

学科主题

筛选

浏览/检索结果: 共5条，第1-5条 帮助 限定条件 发表日期：2007     条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序发表日期升序发表日期降序题名升序题名降序作者升序作者降序 High power VCSEL device with periodic gain active region - art. no. 67820O 会议论文  OAI收割 2007 作者:  Sun Y.;  Wang L.;  Wang L.;  Wang L.;  Liu Y. 收藏  |  浏览/下载：7/0  |  提交时间：2013/03/28 High power VCSEL device with periodic gain active region (EI CONFERENCE) 会议论文  OAI收割 Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China 作者:  Zhang Y.;  Liu Y.;  Liu Y.;  Liu Y.;  Qin L. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 High power vertical cavity surface emitting lasers with large aperture have been fabricated through improving passivation  lateral oxidation and heat dissipation techniques. Different from conventional three quantum well structure  a periodic gain active region with nine quantum wells was incorporated into the VCSEL structure  with which high efficiency and high power operation were expected. The nine quantum wells were divided into three groups with each of them located at the antinodes of the cavity to enhance the coupling between the optical field and the gain region. Large aperture and bottom-emitting configuration was used to improve the beam quality and the heat dissipation. A maximum output power of 1.4W was demonstrated at CW operation for a 400m-diameter device. The lasing wavelength shifted to 995.5nm with a FWHM of 2nm at a current of 4.8A due to the internal heating and the absence of active water cooling. A ring-shape farfield pattern was induced by the non-homogeneous lateral current distribution in large diameter device. The light intensity at the center of the ring increased with increasing current. A symmetric round light spot at the center and single transverse mode operation with a divergence angle of 16 were observed with current beyond 4.8A.   The correlation of longitudinal/seasonal variations of evening equatorial pre-reversal drift and of plasma bubbles 期刊论文  OAI收割 ANNALES GEOPHYSICAE, 2007, 卷号: 25, 期号: 12, 页码: 2571-2578 作者:  Li, G.;  Ning, B.;  Liu, L.;  Ren, Z.;  Lei, J.   |  收藏  |  浏览/下载：7/0  |  提交时间：2018/09/26 ionosphere  electric fields and currents  equatorial ionosphere  ionospheric irregularities   The correlation of longitudinal/seasonal variations of evening equatorial pre-reversal drift and of plasma bubbles 期刊论文  OAI收割 ANNALES GEOPHYSICAE, 2007, 卷号: 25, 期号: 12, 页码: 2571-2578 作者:  Li, G.;  Ning, B.;  Liu, L.;  Ren, Z.;  Lei, J.   |  收藏  |  浏览/下载：8/0  |  提交时间：2018/09/26 ionosphere  electric fields and currents  equatorial ionosphere  ionospheric irregularities   The correlation of longitudinal/seasonal variations of evening equatorial pre-reversal drift and of plasma bubbles 期刊论文  OAI收割 ANNALES GEOPHYSICAE, 2007, 卷号: 25, 期号: 12, 页码: 2571-2578 作者:  Li, G.;  Ning, B.;  Liu, L.;  Ren, Z.;  Lei, J. 收藏  |  浏览/下载：13/0  |  提交时间：2015/10/13 ionosphere  electric fields and currents  equatorial ionosphere  ionospheric irregularities