LONG-RANGE COHERENCE IN A SHORT-PULSE FEL

被引：5

作者：

OEPTS, D ^{[1
]}

BAKKER, RJ ^{[1
]}

JAROSZYNSKI, DA ^{[1
]}

VANDERMEER, AFG ^{[1
]}

VANAMERSFOORT, PW ^{[1
]}

机构：

[1] HERIOT WATT UNIV,DEPT PHYS,EDINBURGH EH14 4AS,MIDLOTHIAN,SCOTLAND

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1993年 / 331卷 / 1-3期

基金：

欧盟地平线“2020”;

关键词：

D O I：

10.1016/0168-9002(93)90010-F

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In the free electron laser for infrared experiments (FELIX), a radio-frequency linear accelerator is used to deliver electron micropulses with a duration of about 3 ps. The micropulses are repeated at a frequency of 1 GHz. The length of the optical cavity is 6 m, so that 40 independent optical micropulses are simultaneously circulating in the cavity. Almost complete coherence has been induced between the multiple pulses in FELIX by means of an intracavity Fox-Smith interferometer. A large fraction of the cavity modes is suppressed in this way, and the remaining lines have a relative width on the order of 1:10(6). The stability is in the same range. The gain and saturated power of the laser are almost unaffected. A single mode can in principle be selected from the output beam. This makes the resulting radiation useful for high-resolution spectroscopy applications. Coherence between successive micropulses has also been observed, quite unexpectedly, without the Fox-Smith arrangement.

引用

页码：42 / 47

页数：6

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