3-DIMENSIONAL SIMULATION OF LITTROW-GRATING SIDE-BAND SUPPRESSION IN A 10-KW FREE-ELECTRON LASER

被引：0

作者：

QUIMBY, DC ^{[1
]}

PARAZZOLI, CG ^{[1
]}

PISTORESI, DJ ^{[1
]}

机构：

[1] BOEING DEF & SPACE GRP,SEATTLE,WA 98124

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1994年 / 341卷 / 1-3期

关键词：

D O I：

10.1016/0168-9002(94)90368-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Average Power Laser Experiment (APLE) is a 10 kW free-electron laser (FEL) oscillator operating at 10 mum. Sideband control is required for optimal tapered-undulator power extraction. Sideband suppression with a 10 lines/mm Littrow grating on one of the cavity end mirrors is examined using a full three-dimensional, time-dependent numerical simulation. The relevant 3-D physical aspects including optical pulse stretching, angular wavelength dispersion, losses at apertures in the resonator, and differential head-to-tail steering of the optical micropulse are examined. The grating restores near-ideal power output and a near transform-limited optical spectrum. Littrow grating operation increases the sensitivity of the FEL to changes in e-beam energy, thus establishing an important tolerance for the allowable energy fluctuation level.

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页码：293 / 299

页数：7

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