中国科学院机构知识库网格系统: 检索

Excited-State-Modulated Dual-Wavelength Single-Mode Lasing from a Single-Component Organic Microbelt 期刊论文 OAI收割
ADVANCED OPTICAL MATERIALS, 2022, 页码: 7
作者: De, Jianbo; Liu, Zhenzhi; Yin, Fan; Chen, Jingyao; Gu, Chunling

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收藏 | 浏览/下载：46/0 | 提交时间：2022/06/15

excited-state intramolecular proton transfer multiple-wavelength emission organic crystals single-mode lasers

No pulsed radio emission during a bursting phase of a Galactic magnetar 期刊论文 OAI收割
Nature, 2020, 卷号: 587, 页码: 63-65
作者: HXMT

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收藏 | 浏览/下载：51/0 | 提交时间：2022/02/08

Astrophysics - High Energy Astrophysical Phenomena Abstract: Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown physical origin observed at extragalactic distances^1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources^4-13, but no convincing evidence has been collected so far¹⁴. Recently, the Galactic magnetar SRG 1935+2154 entered an active phase by emitting intense soft íray bursts¹⁵. One FRB-like event with two peaks (FRB 200428) and a luminosity slightly lower than the faintest extragalactic FRBs was detected from the source, in association with a soft íray/hard-X-ray flare^18-21. Here we report an eight-hour targeted radio observational campaign comprising four sessions and assisted by multi-wavelength (optical and hard-X-ray) data. During the third session, 29 soft-íray repeater (SGR) bursts were detected in íray energies. Throughout the observing period, we detected no single dispersed pulsed emission coincident with the arrivals of SGR bursts, but unfortunately we were not observing when the FRB was detected. The non-detection places a fluence upper limit that is eight orders of magnitude lower than the fluence of FRB 200428. Our results suggest that FRB-SGR burst associations are rare. FRBs may be highly relativistic and geometrically beamed, or FRB-like events associated with SGR bursts may have narrow spectra and characteristic frequencies outside the observed band. It is also possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.

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：11/0 | 提交时间：2020/08/24

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

Two-Segment Gain-Coupled Distributed Feedback Laser 期刊论文 OAI收割
Ieee Photonics Journal, 2018, 卷号: 10, 期号: 1, 页码: 9
作者: Gao, F.; Qin, L.; Chen, Y. Y.; Jia, P.; Chen, C.

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收藏 | 浏览/下载：18/0 | 提交时间：2019/09/17

Semiconductor lasers distributed-feedback single-mode tunable lasers wavelength tuning range high-power semiconductor-laser dfb lasers stabilization linewidth oscillation Engineering Optics Physics

A wavelength selective application for an optical fiber surface plasmon resonance sensor 期刊论文 OAI收割
OPTICS COMMUNICATIONS, 2016, 卷号: 363, 页码: 110-116
作者: Sun, Yufeng; Cao, Haiyan; Ma, Li; Cui, Hongliang; Huang, Yu

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收藏 | 浏览/下载：14/0 | 提交时间：2018/03/15

Surface plasmon Optical-fiber Sensor Single wavelength

Single-polarization, dual-wavelength mode-locked Yb-doped fiber laser by a 45 degrees-tilted fiber grating 期刊论文 OAI收割
laser physics letters, 2015, 卷号: 12, 期号: 6
作者: Liu, Xianglian; Wang, Hushan; Wang, Yishan; Yan, Zhijun; Zhang, Lin

收藏 | 浏览/下载：34/0 | 提交时间：2015/07/22

fiber lasers single-polarization dual-wavelength fiber grating

Lanthanide-Doped Multicolor GdF(3) Nanocrystals for Time-Resolved Photoluminescent Biodetection 期刊论文 OAI收割
Chemistry-a European Journal, 2011, 卷号: 17, 期号: 31, 页码: 8549-8554
Q. Ju; Y. S. Liu; D. T. Tu; H. M. Zhu; R. F. Li; X. Y. Chen

收藏 | 浏览/下载：21/0 | 提交时间：2012/06/06

bioprobes GdF(3) nanocrystals lanthanides magnetic resonance imaging time-resolved photoluminescence ln(3+)-doped laf3 nanoparticles single-wavelength excitation up-conversion nanocrystals imaging contrast agent silica nanoparticles magnetic-resonance nayf4 nanocrystals energy-transfer quantum dots upconverting nanoparticles

Preparation of cereal-like YVO4:Ln(3+) (Ln = Sm, Eu, Tb, Dy) for high quantum efficiency photoluminescence 期刊论文 OAI收割
Nanotechnology, 2010, 卷号: 21, 期号: 19
L. P. Li, M. L. Zhao, W. M. Tong, X. F. Guan, G. S. Li and L. S. Yang

收藏 | 浏览/下载：38/0 | 提交时间：2012/11/02

single-wavelength excitation wide ph range hydrothermal synthesis luminescent properties energy-transfer light-emission nanoparticles nanocrystals nanorods architectures

Poly (acrylic acid)-capped lanthanide-doped BaFCl nanocrystals: synthesis and optical properties 期刊论文 OAI收割
Nanoscale, 2010, 卷号: 2, 期号: 7, 页码: 1208-1212
Q. A. Ju, W. Q. Luo, Y. S. Liu, H. M. Zhu, R. F. Li and X. Y. Chen

收藏 | 浏览/下载：19/0 | 提交时间：2012/11/02

ln(3+)-doped laf3 nanoparticles single-wavelength excitation near-infrared emission one-pot synthesis energy-transfer water avidin

Experiments of second harmonic generation output in pulsed TEA CO 2 laser (EI CONFERENCE) 会议论文 OAI收割
High-Power Lasers and Applications V, October 18, 2010 - October 19, 2010, Beijing, China
作者: Li D.

收藏 | 浏览/下载：65/0 | 提交时间：2013/03/25

It is always the hot subject to realize the output of high-power laser in the range of 3-5m wavelength. This rang of wave band has greatly important applications in military because it located in the atmosphere window. Generally there are two ways to obtain this range of laser wavelength. One way is through optical parameter oscillation (OPO) from shorter laser wavelength and the other is through second harmonic generation (SHG) from longer laser wavelength. Firstly the comparison between tow nonlinear crystals ZnGeP2 and AgGaSe2 is conducted for their nonlinear coefficient and damaging threshold in theory. The theoretical results show that the crystal AgGaSe 2 is more suitable for the SHG of pulsed TEA CO2 laser. When using pulsed TEA CO2 laser with wavelength of 9.3m to pumping AgGaSe2 SHG crystal the wavelength of 4.65m is obtained. In the condition of repetition rate 100Hz the upmost output power of single pulse is up to level of 1W which corresponding efficiency of SHG is about 6%. The experimental results show that the polarization of laser beam has greatly influence on the SHG output of the crystal. Under the radiation of 3MW/cm 2 from fundamental wave and the right position for maximal SHG output in the crystal when polarization of laser beam rotates 4.5 the SHG output of energy decrease about 30%. The research of this paper will make a foundation for further development of mid-infrared laser. 2010 Copyright SPIE - The International Society for Optical Engineering.