Demonstration of large-aperture tiled-grating compressors for high-energy, petawatt-class, chirped-pulse amplification systems

Qiao, Jie; Kalb, A.; Nguyen, T.; Bunkenburg, J.; Canning, D.; Kelly, John

doi:10.1364/ol.33.001684

Cited by 49 publications

(17 citation statements)

References 4 publications

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“…Figure 3 shows the results of two square beam combines with different piston errors using the above analytical results Eqs. (10)(11)(12). In Fig.…”

Section: Piston Error and Coherent Beam Combingmentioning

confidence: 98%

“…All four of these characteristic quantities can be gotten based on the above analytical results, Eqs. (10)(11)(12). More importantly, the above four quantities offer several ways to eliminate the piston error in phasing the combined beam.…”

Section: Piston Error and Coherent Beam Combingmentioning

confidence: 99%

“…Many efforts have been made to improve the laser intensity, especially on the aspects of the meter scale grating (multilayer dielectric grating and gold grating) [7,8] and the grating tiling [9][10][11][12][13]. However, the limited beam size is still a huge obstacle to improve the laser intensity.…”

Section: Introductionmentioning

confidence: 99%

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Phase control requirements of high intensity laser beam combining

Gao

Zhu

et al. 2012

Appl. Opt.

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Aiming at getting the general requirements of the beam combine for ignition scale laser facilities, the analytical expressions including the factors affecting the combine results are derived. The physical meanings of every part are illustrated. Based on these expressions, the effects of the factors, including the beam configuration, piston error, and tip/tilt error, are studied analytically and numerically. The results show that the beam configuration cannot affect the Strehl ratio (SR) of the combined beam, but it influences the FWHM of the main peak and the ratio of the main peak and the side peak. The beam separation should be no more than 1.24 times the individual beam width for the multibeam combine, and be close to the individual beam width for the two-beam combine as much as possible. The piston error can change the characteristics of the combine beam focus, including the peak intensity, the focal spot morphology, the fractional energy contained within a certain area, and the center of mass. For the two-beam combine, a piston error less than 2π/5 rad is suitable, and for the multibeam combine, the standard deviation of the piston error should be no more than 2π/10 rad. The tip/tilt error has a great influence on the combined results. It affects the superposition degree of the focal spots of the combined elements directly. A requirement of 0.5~1 μrad for the standard deviation of the tip/tilt error is adequate.

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“…Figure 3 shows the results of two square beam combines with different piston errors using the above analytical results Eqs. (10)(11)(12). In Fig.…”

Section: Piston Error and Coherent Beam Combingmentioning

confidence: 98%

Section: Piston Error and Coherent Beam Combingmentioning

confidence: 99%

See 1 more Smart Citation

Phase control requirements of high intensity laser beam combining

Gao

Zhu

et al. 2012

Appl. Opt.

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“…In so doing, the peak intensity will be scaled. This technique has been studied both in theory and experiment [2][3][4][5][6][7][8][9][10][11][12], and some schemes have been used in large facilities [3,4,6,7,11]. *E-mail: wangxiaocn@263.net A two-pass full-tiled grating compressor is successfully used in XG III laser facility, which is built at the Research Center of Laser Fusion, China Academy of Engineering Physics [6].…”

Section: Introductionmentioning

confidence: 99%

Method to realize real-time monitoring and control of a tiled-grating compressor for the XGIII laser facility

Wang

et al. 2015

SPIE Proceedings

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In a high-energy chirped-pulse-amplified laser system, grating tiling technology provides an effective means to increase the aperture of the gratings and to scale the energy and irradiance of short-pulse lasers. The difficulties lie in controlling tiling errors accurately between the sub-gratings and keeping long time stability. In this paper, a two-pass full-tiled grating-compressor (TGC) with real-time control unit is developed for the first time. The far-field distributions of the 0 th order and -1 st order diffracted beams of the two pairs of tiled gratings are monitored by the same CCD system, with the main laser chain being not disturbed. In this way, we realize online real-time control of tiling errors. Through a method of locking the far-field image to compensating the temporal drift, we can realize the automation of the assembly. The TGC has successfully applied in the multi-function XGIII laser facility, and focusing focal spot and output pulse width are obtained.

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“…Meter-sized and even multiple-meter-sized multilayer dielectric (MLD) gratings are needed in petawatt laser systems that are based on chirped-pulse amplification (CPA) with kilojoule, picosecond pulses and >10 20 W=cm 2 focused intensities [1,2]. Currently available individual MLD gratings of sizes of less than 1 m cannot satisfy the large-size requirement.…”

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confidence: 99%

Object–image-grating self-tiling to achieve and maintain stable, near-ideal tiled grating conditions

Wang

et al. 2010

Opt. Lett.

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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.

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Demonstration of large-aperture tiled-grating compressors for high-energy, petawatt-class, chirped-pulse amplification systems

Cited by 49 publications

References 4 publications

Phase control requirements of high intensity laser beam combining

Phase control requirements of high intensity laser beam combining

Method to realize real-time monitoring and control of a tiled-grating compressor for the XGIII laser facility

Object–image-grating self-tiling to achieve and maintain stable, near-ideal tiled grating conditions

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