Open AccessResearch on the formation of narrow bandwidth long flat-top pulse via coherent addition of ultra-short pulses
Author(s) -
Zairu Ma,
Guoying Feng,
Jianguo Chen,
Qihua Zhu,
Xiaoming Zeng,
Wenbing Liu,
Shouhuan Zhou
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.933
Subject(s) - fabry–pérot interferometer , pulse shaping , amplifier , bandwidth limited pulse , bandwidth (computing) , pulse (music) , optics , femtosecond pulse shaping , materials science , ultrashort pulse , pulse compression , physics , telecommunications , laser , computer science , radar , detector
Making use of the spectrum gain narrowing effect during the ultra-short pulse amplification in the gain media and the filter effect of the etalon, and adopting the principles of the regenerative amplifier, the multi-pulse coherent addition scheme is proposed and analyzed. In the small signal gain region of the ultra-short pulse amplification in the regenerative amplifier, theoretical analysis and numerical simulation have been made on the multi-pulse coherent addition stage. The simulation suggests that the width of the sub-pulse, the loss in the regenerative amplifier and the mismatch between the oscillator and the regenerative amplifier are the key factors affecting the temporal shape of the composite pulse, although they have little influence on its spectrum. Both the numbers of the constituent sub-pulses and the bandwidth of the etalon have influence on the shape and spectrum of the pulse.