中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共3条，第1-3条

帮助

条数/页：排序方式：
	Image and data processing of digital zenith telescope (DZT-1) of China 期刊论文 OAI收割 CHINESE SCIENCE BULLETIN, 2014, 卷号: 59, 期号: 17, 页码: 1984-1991 作者: Wang, Bo; Tian, Lili; Wang, Zheng; Yin, Zhiqiang; Liu, Weidong 收藏 \| 浏览/下载：35/0 \| 提交时间：2016/12/01 Astrometry Plumb line variation Deflection of the vertical DZT-1 Astronomical latitude and longitude
	Progress of research on anomalies of astronomical time and latitude observations before earthquake 期刊论文 OAI收割 CHINESE SCIENCE BULLETIN, 2012, 卷号: 57, 期号: 27, 页码: 3547-3555 作者: Wang Bo; Yin ZhiQiang; Han YanBen 收藏 \| 浏览/下载：23/0 \| 提交时间：2016/11/24 earthquake residuals of astronomical time and latitude the vertical variation astronomical observation DZT
	Temperature characteristics of high power vertical cavity surface emitting lasers (EI CONFERENCE) 会议论文 OAI收割 Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China 作者: Qin L. 收藏 \| 浏览/下载：29/0 \| 提交时间：2013/03/25 By using oxidation confinement technology high power vertical-cavity surface-emitting lasers are fabricated in experiment. The electrical and optical performance characteristics such as threshold current efficiency emission wavelength and output power are measured under continuous wave (CW) condition at room temperature. The maximum output power is up to watt regime at wavelength of about 980nm. The temperature characteristics of the device are investigated experimentally in detail. The variation in lasing threshold current with temperature is studied. The characteristic temperature T0 of the device is derived and the value is about 211K. Such a high characteristic temperature T0 of threshold current can lead to good temperature sensitivity of the device. At the same time the lasing spectrum characteristics with temperature are also measured. The wavelength shift with temperature is just about 0.06nm/K. From the measured results it is shown that the device can still operate at high temperature condition.