The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A novel algorithm for on-line triple-wave measurements based on phase modulation and coherent iterative engine with single diffraction pattern. It could be a potential technique for pulse laser diagnostic in high power laser systems.
A new laser facility with 30kJ/ns/3ω(8 beams) output energy has begun operation with good performance. Another single laser prototype pushes 1ω output energy to 17.5kJ/21ns in 350mm×350mm aperture with four-pass main amplifier architecture.
A universal phase mismatch compensation method, which can be applied to temperature-insensitive frequency conversion, is experimentally demonstrated. In this method, two nonlinear crystals and an electro-optic crystal are cascaded. The generated phase mismatch in the nonlinear crystal can be well compensated for in the electro-optic crystal, thereby improving the stability of frequency conversion...
The PW beamline for SG-II upgrade laser facility has been implemented. An OPCPA-based front-end system was setup and a 35-mJ pulse was injected into main amplifier. Up to 2kJ chirped pulse was delivered.
The new requirements of the CAD system for cross-domain mechatronic design especially 3D-MID design lead to an expansion of the information capacity for the development of an electronic parts library. In this paper, a methodology of creating a electronic/mechanical integrated, cross-domain, three-dimensional parts library for the design of Molded Interconnect Devices (3D-MID) is presented. This library...
This paper adopts cylinder lens to improve the ability of pulse contrast measurement based on a pulse replicator. Cylinder lens were used to generate linear beam to get a temporal window in auto-correlation and cross correlation. Now they are introduced into a pulse replicator to obtain continuous temporal range. It is analyzed that some parameters need to satisfy a relationship for the window's continuer...
This paper proposes a method to measure the retardance of optical fibrous materials based on simultaneous phase shifting technique, which can reduce sensitivity of an optical test to the environmental disturbance.
As the further discussion on ghost images, the sensitiveness to lens manufacture errors and the induced position shifting are approximately analyzed based on the determinate ghost images distribution in high-power laser facilities.
Propagation of a divergent beam with amplitude ripples in a spatial filter is studied. We find that the filtering properties have strong dependence on the divergence and the modulation frequency of the beam and the pinhole size.
A petawatt (PW) beam line, which will deliver 1 kJ pulses with pulse duration near 1 ps, is being set up. Similar to the other high peak-power laser systems, the design of PW beam line also builds on chirped pulse amplification (CPA) techniques. Several new components except for the existing amplifier chain of the ninth beam in Shen-Guang-II (SG-II) facility are introduced, such as an optical parametric...
This paper review the passive vibration isolation system firstly, and point out the conflicts: different frequency band requires different damping ratio; different disturbance needs different supporting stiffness. By using negative stiffness mechanism, zero and infinite dynamic stiffness are obtained. To solve former conflicts, a system with anisotropic stiffness is described. And for a practical...
SG-II and recent year Precision SG-II laser facility have been put into operation successfully. The SG-II additional beam (the Ninth Beam) with the large beam clear aperture of 230 mm has completed since the end of 2004, with an higher 3 omega0 3ns energy fluence. Driver progress promotes to the impetus of China laser fusion program.
Based on the scheme of chirped pulse amplification, a Ti:sapphire laser facility with output power of 0.89 PW has been developed. The compressed pulse width of ~29.0 fs was achieved by minimizing the dispersion introduced by the optical components. The effective suppression of parasitic lasing ensured the high-gain amplification in large aperture amplifiers.
In order to meet the new requirements of the scientific research for high energy density physics, ICF, especially the fast ignition in inertial fusion energy, the upgrade program of SG-II facility has been carried. To achieve the performance goals of PW laser in SG-II facility, the enabling technologies about optical parametric chirped-pulse amplification (OPCPA), deformable mirrors and tiled gratings...
Solid-state lasers have been progressing rapidly in China in recent years. Several joint projects sponsored by the government have been started to enhance the capabilities of innovation and development in high-power solid-state lasers.
A Ti:sapphire laser with output of 0.89PW/29.0fs based on the scheme of chirped pulse amplification has been developed. The high gain amplification was achieved in large aperture amplifiers by effective suppression of parasitic lasing.
A Ti:sapphire laser with output of 0.89PW/29.0fs based on the scheme of chirped pulse amplification has been developed. The high gain amplification was achieved in large aperture amplifiers by effective suppression of parasitic lasing.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.