Generation of 3D ellipsoidal laser beams by means of a profiled volume chirped Bragg grating

被引：29

作者：

Mironov, S. Yu ^{[1
]}

Poteomkin, A. K. ^{[1
]}

Gacheva, E. I. ^{[1
]}

Andrianov, A. V. ^{[1
]}

Zelenogorskii, V. V. ^{[1
]}

Vasiliev, R. ^{[2
]}

Smirnov, V. ^{[2
]}

Krasilnikov, M. ^{[3
]}

Stephan, F. ^{[3
]}

Khazanov, E. A. ^{[1
]}

机构：

[1] RAS, Inst Appl Phys, Nizhnii Novgorod, Russia

[2] OptiGrate Corp, 562 South Econ Circle, Oviedo, FL 32765 USA

[3] DESY, Platanenallee 6, D-15738 Zeuthen, Germany

来源：

LASER PHYSICS LETTERS | 2016年 / 13卷 / 05期

基金：

俄罗斯科学基金会;

关键词：

3D beam shaping; lasers for photocathodes; volume chirped Bragg grating;

D O I：

10.1088/1612-2011/13/5/055003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A method for shaping photocathode laser driver pulses into 3D ellipsoidal form has been proposed and implemented. The key idea of the method is to use a chirped Bragg grating recorded within the ellipsoid volume and absent outside it. If a beam with a constant (within the grating reflection band) spectral density and uniform (within the grating aperture) cross-section is incident on such a grating, the reflected beam will be a 3D ellipsoid in space and time. 3D ellipsoidal beams were obtained in experiment for the first time. It is expected that such laser beams will allow the electron bunch emittance to be reduced when applied at R-+/- photo injectors.

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页数：7

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