Shanghai Institute of Laser and Plasma

Shanghai, China

Shanghai Institute of Laser and Plasma

Shanghai, China

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Li Z.,Shanghai Institute of Laser and Plasma | Wang T.,Shanghai Institute of Laser and Plasma | Dai Y.,Shanghai Institute of Laser and Plasma | Xu G.,CAS Shanghai Institute of Optics and fine Mechanics
2011 Int. Quantum Electron. Conf., IQEC 2011 and Conf. Lasers and Electro-Optics, CLEO Pacific Rim 2011 Incorporating the Australasian Conf. Optics, Lasers and Spectroscopy and the Australian Conf. | Year: 2011

To reach kilojoule, petawatt laser pulses, an object-image grating self-tiling technology for enlarging the effective aperture of a grating is proposed. Using this technology, a related X-shape grating compressor design is given. © 2011 IEEE.


Wang T.,Shanghai Institute of Laser and Plasma | Cui Y.,Shanghai Institute of Laser and Plasma | Zhu J.,Shanghai Institute of Laser and Plasma | Xu G.,CAS Shanghai Institute of Optics and fine Mechanics | And 2 more authors.
2015 IEEE Photonics Conference, IPC 2015 | Year: 2015

Pulse contrast measurements at the SG-II upgrade Petawatt (PW) laser beamline showed its capability to deliver pulses with 106 temporal contrast. By shaping of seeding pulse in spectral domain, amplified chirped pulses with a spectral width of 6nm have been realized, which means chirped pulses could be compressed to a pulse duration below 500fs or shorter. © 2015 IEEE.


Zhang H.,CAS Shanghai Institute of Optics and fine Mechanics | Zhou S.,CAS Shanghai Institute of Optics and fine Mechanics | Jiang Y.,CAS Shanghai Institute of Optics and fine Mechanics | Li J.,CAS Shanghai Institute of Optics and fine Mechanics | And 2 more authors.
Chinese Optics Letters | Year: 2012

In order to avoid stimulated Brillouin scattering and smooth the final focal spot that reaches the D-T capsule, spectral broadening is essential. However, the modulation of spectral structure might result in frequency-to-amplitude modulation (FM-to-AM) conversion. The spatial filter pinhole is used to cut off the high-frequency transmission laser, and to ensure the desired pass. Improper parameter of pinhole would lead a negative impact. Using the spatial filter pinhole, we analyze the characteristic of intensity modulation using several pinholes of improper parameters. We then compare these results with the intensity modulation obtained from an experiment. Experimental diagnosis and design of an appropriate pinhole parameter would be highly beneficial to the field of high-power lasers. © 2012 Chinese Optics Letters.


Cai H.,Fudan University | You Q.,Fudan University | Hu Z.,East China Normal University | Duan Z.,East China Normal University | And 4 more authors.
Solar Energy Materials and Solar Cells | Year: 2014

We report on a study on the correlation between the photoluminescence and the photoelectrochemical properties of ZnO-TiO2 heterogeneous nanostructure composed of anatase TiO2 nanotubes and wurtzite ZnO coatings. Vertically aligned ZnO coated TiO2 nanotube (ZnO/TiO 2 NT) arrays have been fabricated by atomic layer deposition of ZnO coatings on electrochemical anodization formed TiO2 nanotubes. The obtained ZnO/TiO2 NT arrays show higher photoresponse to shorter wavelength light than to longer wavelength light. A reduction in photoluminescence and an enhancement in photoelectrochemical activity are observed for annealed ZnO/TiO2 NT arrays. ZnO/TiO2 NTs with thinner ZnO coatings rather than thicker ZnO coatings have better photoelectrochemical properties. Compared with bare TiO2 NT arrays, an increase in photocurrent of about 50 percent is obtained for the arrays of 450 C annealed of ZnO/TiO2 NTs with 10-cycle deposition of ZnO coatings under visible illumination with cutoff of 420 nm. © 2014 Elsevier B.V.


Li Z.,Shanghai Institute of Laser and Plasma | Xu G.,CAS Shanghai Institute of Optics and fine Mechanics | Wang T.,Shanghai Institute of Laser and Plasma | Dai Y.,Shanghai Institute of Laser and Plasma
Optics Letters | Year: 2010

We propose and demonstrate an object-image-grating self-tiling method for doubling the effective aperture of a grating by tiling it with its image to form an object-image-grating pair. With the aid of the object-image relation, the line-density variation, angular tip, and longitudinal piston errors within a tiled grating no longer exist. The method helps achieve and maintain a near-ideal tiled grating by using a simple far-field method. Because one tiled grating requires only one beam line, a single probe laser can be used for first-installation adjustments and long-term maintenance monitoring, with no wavelength or incident angle limitations. © 2010 zptical Society of America.


Ji L.-L.,CAS Shanghai Institute of Optics and fine Mechanics | Ji L.-L.,Shanghai Institute of Laser and Plasma | Zhu B.-Q.,CAS Shanghai Institute of Optics and fine Mechanics | Zhan T.-Y.,CAS Shanghai Institute of Optics and fine Mechanics | And 4 more authors.
Wuli Xuebao/Acta Physica Sinica | Year: 2011

To investigate the output of ultraviolet of ShenguangII upgrade project, and study the relevant problem in the harmonics generation in high power laser driver, an experiment with 'I+II' phase match is conducted in the Shenguang-II NO.9 device.The maximal output energy of ultraviolet reaches 2740 J, the maximal fluency exceeds 3.6 J/cm2, and the maximal conversion efficiency is ~63%. The parameters that affect the conversion efficiency are preliminary discussed with experimenal results; the amplitude modulation caused by phase modulation and traverse stimulation Raman scattering is observed in experiment. The design program and parameters for Shenguang-II upgrade device are testified by the experimental results. © 2011 Chinese Physical Society.


Zhang H.,CAS Shanghai Institute of Optics and fine Mechanics | Zhou S.,CAS Shanghai Institute of Optics and fine Mechanics | Wu R.,CAS Shanghai Institute of Optics and fine Mechanics | Li J.,CAS Shanghai Institute of Optics and fine Mechanics | And 2 more authors.
Zhongguo Jiguang/Chinese Journal of Lasers | Year: 2011

Lens array is always used to improve the uniformity of far field spatial intensity distribution on a high power laser system. This article introduces the simulated annealing algorithm into an optimal design of lens array, which changes the size and lens attributes of array elements, and finally reduces the ununiformity of the focal speckle from 0.2268 which is measured with a classical design to 0.1202 under the condition that the energy efficiency is satisfied, this shows that the optimal design greatly improves the uniformity. The curves of power spectral density of two speckle are also contrasted to research the impact of different design structures on it.


Du A.,Tongji University | Zhou B.,Tongji University | Li Y.,Tongji University | Li X.,Tongji University | And 5 more authors.
Journal of Reinforced Plastics and Composites | Year: 2011

Considering its special microstructure and unique properties, silica aerogel was chosen as three-dimensional (3D) nanoporous filler for epoxy resin in this paper. Pure epoxy resin (0 wt%), 0.1 wt%, 1 wt%, 5 wt%, 10 wt%, and 100 wt% (pure silica aerogel) aerogel/epoxy composites were fabricated and then characterized by dynamic mechanical analyzer (DMA) and field emission scanning electron microscope. The results showed that small amount of filler efficiently increased the stiffness of the composites, but the stiffness decreased with the increase of the mass fraction of the aerogel in the composites (composites ratio); the glass transition temperature of the composites substantially increased, compared to pure epoxy resin. Also, the compressive modulus of the composites at glassy state, rubbery state, and hardening state were studied, respectively. At last, the effects which presumably affect the properties of aerogel/epoxy composites were discussed. Anchoring effect and interfacial effect were suggested to explain the thermal-mechanical behaviors of the composites with different composite ratio. © The Author(s) 2011.


Ye J.-J.,Shanghai Institute of Laser and Plasma | He J.-H.,Shanghai Institute of Laser and Plasma | Xie Z.-Y.,Shanghai Institute of Laser and Plasma | Wang C.,Shanghai Institute of Laser and Plasma | Fu S.-Z.,Shanghai Institute of Laser and Plasma
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2010

The hole targets in X-ray laser jets experiments were fabricated. Holes were drilled by drill press in Al and CH films by machine and pico-second laser. The hole targets were assembled by precision assemblage and measured by Wyko NT 1100 surface profiler and 2 dimensions coordinate measuring machine. The apertures are fine and the same between face and con-face, and the interface of layers are connected closely and seem clear.

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