中国科学院机构知识库网格系统: 检索

Energy-Efficient 50+Gb/s VCSELs for 200+Gb/s Optical Interconnects 期刊论文 OAI收割
Ieee Journal of Selected Topics in Quantum Electronics, 2019, 卷号: 25, 期号: 6, 页码: 5
作者: G.Larisch; R.Rosales; D.Bimberg

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收藏 | 浏览/下载：9/0 | 提交时间：2020/08/24

Energy efficiency,optical interconnects,wavelength division,multiplexing,vertical cavity surface emitting laser,single mode

A novel photonic crystal vertical cavity surface emitting laser based on coherent coupling 期刊论文 OAI收割
chinese science bulletin, 2010, 卷号: 55, 期号: 2, 页码: 111-113
Liu AJ (Liu AnJin); Qu HW (Qu HongWei); Xing MX (Xing MingXin); Chen W (Chen Wei); Zhou WJ (Zhou WenJun); Zheng WH (Zheng WanHua)

收藏 | 浏览/下载：170/28 | 提交时间：2010/04/13

photonic crystal vertical cavity surface emitting laser coherent coupling divergence angle single mode SINGLE-MODE HIGH-POWER HOLEY STRUCTURE WAVELENGTH TRANSVERSE RELIEF VCSELS

Vertical wavenumber spectra of atmospheric ozone measured from ozonesonde observations 期刊论文 OAI收割
Advances in Space Research, 2009, 卷号: 43, 期号: 9, 页码: 1364-1371
Yuan, W.; Xu, J. Y.; Wu, Y. F.; Bian, J. C.; Chen, H. B.

收藏 | 浏览/下载：40/0 | 提交时间：2014/04/30

Ozonesonde measurement Ozone and ozone spectra Gravity waves and saturation models Dominant vertical wavelength gravity-waves commercial aircraft universal spectrum middle atmosphere temperature saturation winds stratosphere climatology variability

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.

Nonlinear interactions between gravity waves and background winds 期刊论文 iSwitch采集
Progress in natural science-materials international, 2007, 卷号: 17, 期号: 6, 页码: 639-644
作者: Liu, Xiao; Xu, Jiyao

收藏 | 浏览/下载：37/0 | 提交时间：2019/05/10

Gravity waves Background winds Vertical group velocity Vertical wavelength Nonlinear interactions

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.

收藏 | 浏览/下载：31/0 | 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.

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.

High-power InGaAs VCSEL's single devices and 2-D arrays (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Materials and Devices for Optical Communications, November 7, 2005 - November 10, 2005, Shanghai, China
作者: Sun Y.; Wang L.; Wang L.; Wang L.; Liu Y.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

We report on bottom-emitting vertical-cavity surface-emitting lasers (VCSEL's) and laser arrays providing high output powers in the 980-nm wavelength regime. Single devices with active diameters of 500 m show high output powers of 1.95 W at room temperature. Its threshold current is 510 mA and the maximum spatially averaged optical power density is 0.93 kW/cm2. 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 a average optical power density of 1KW/cm2. The threshold current of the array is 1.32A and the lasing peak wavelength is 981.9 nm. The distinction of emission spectrums between the single device and the array is discussed.

High-power VCSELs single devices aid 2-D 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.; Wang L.; Wang L.; Liu Y.

收藏 | 浏览/下载：14/0 | 提交时间：2013/03/25

The high power bottom-emitting vertical-cavity surface-emitting lasers (VCSELs) and laser arrays emitting at 980 nm are reported. Extensive investigations on size scaling behavior of thermal properties of single devices show limits of attainable output characteristics. The maximum continuous wave (CW) output power at room temperature of single devices with aperture size up to 500 m is as high as 1.95 W. The key characteristics such as maximum output power wavelength and thermal resistance are discussed. The bottom-emitting arrays of 16 elements and 200 m aperture size of individual elements show output power of CW 1.35 W at room temperature. The far-field angle is below 17 for all driving current which is very favorable for focusing or collmating optics.

Vertical-external-cavity surface-emitting lasers operating at different wavelength: Design, numerical simulation, and characteristics (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Materials and Devices for Optical Communications, November 7, 2005 - November 10, 2005, Shanghai, China
作者: Qin L.; Jiang H.; Wang L.; Wang L.; Wang L.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

We describe design numerical simulation and characteristics of high-power optical pumped VECSELs at different wavelength (980nm and 1300nm). The device design realizes the integrating diode-pumped lasers with vertical-cavity surface-emitting laser structure drawing on the advantages of both. With periodical gain element structure optical pumped VECSEL is scalable to watt level output. The characteristics such as threshold condition and output power are calculated theoretically. An optimum number of quantum wells and external mirror reflectivity are obtained from the calculation results and the thermal characteristic is also considered. Finally the calculation results also predict high output power in this kind of device structure.