强激光与粒子束
彊激光與粒子束
강격광여입자속
HIGH POWER LASER AND PARTICLEBEAMS
2014年
10期
101023-1-101023-5
,共1页
李彬%叶一东%颜宏%田飞%陈黎%罗佳%马立斌
李彬%葉一東%顏宏%田飛%陳黎%囉佳%馬立斌
리빈%협일동%안굉%전비%진려%라가%마립빈
激光场相干叠加%光束合成%相干合成%SPGD 算法
激光場相榦疊加%光束閤成%相榦閤成%SPGD 算法
격광장상간첩가%광속합성%상간합성%SPGD 산법
laser field beam coherent superposing%beam combining%coherent beam combining%stochastic parallel gra-dient descent (SPGD)algorithm
光束拼接激光相干合成中,拼接占空比不高导致合成光束能量集中度不够理想,为了解决这个问题,提出了激光场相干叠加光束合成技术路线,设计了基于半反半透合束镜的多级激光场相干叠加光束合成方案。研究了子光束之间的光强差和波面误差对相干合成的影响,结果表明,激光场相干叠加光束合成中,对参与合成子光束的光强差、相位差的容差均不难满足:仅考虑单一因素时,子束光强相差三倍时合成效率仍可达90%,相位误差小于π/5时,合成效率可达到90.5%。搭建了基于半透半反合束镜的两束激光场相干叠加光束合成实验装置,实验验证了激光场相干叠加光束合成技术的可行性,在闭环情况下得到了稳定的合成光束输出,合成效率可达95%以上。
光束拼接激光相榦閤成中,拼接佔空比不高導緻閤成光束能量集中度不夠理想,為瞭解決這箇問題,提齣瞭激光場相榦疊加光束閤成技術路線,設計瞭基于半反半透閤束鏡的多級激光場相榦疊加光束閤成方案。研究瞭子光束之間的光彊差和波麵誤差對相榦閤成的影響,結果錶明,激光場相榦疊加光束閤成中,對參與閤成子光束的光彊差、相位差的容差均不難滿足:僅攷慮單一因素時,子束光彊相差三倍時閤成效率仍可達90%,相位誤差小于π/5時,閤成效率可達到90.5%。搭建瞭基于半透半反閤束鏡的兩束激光場相榦疊加光束閤成實驗裝置,實驗驗證瞭激光場相榦疊加光束閤成技術的可行性,在閉環情況下得到瞭穩定的閤成光束輸齣,閤成效率可達95%以上。
광속병접격광상간합성중,병접점공비불고도치합성광속능량집중도불구이상,위료해결저개문제,제출료격광장상간첩가광속합성기술로선,설계료기우반반반투합속경적다급격광장상간첩가광속합성방안。연구료자광속지간적광강차화파면오차대상간합성적영향,결과표명,격광장상간첩가광속합성중,대삼여합성자광속적광강차、상위차적용차균불난만족:부고필단일인소시,자속광강상차삼배시합성효솔잉가체90%,상위오차소우π/5시,합성효솔가체도90.5%。탑건료기우반투반반합속경적량속격광장상간첩가광속합성실험장치,실험험증료격광장상간첩가광속합성기술적가행성,재폐배정황하득도료은정적합성광속수출,합성효솔가체95%이상。
In the tiled-aperture coherent beam combining,the low filling factor will reduce the beam combining efficiency. To solve this problem,we proposed a filled-aperture coherent beam combining scheme based on the semi-transparent mirror. We studied the influences of the light intensity difference and wave-front phase error on the efficiency of the beam combination. The results show that it is not difficult to meet the tolerance requirement of light intensity difference and the wave-front phase er-ror requirement in the filled-aperture coherent beam combining.When considering the single factor,if the single beam's intensity is three times larger than the others',the efficiency of the combining can reach 90%.And if the phase error is less than π/5,the efficiency of the combining can reach 90.5%.We designed an experimental instrument to verify the feasibility of the filled-aper-ture coherent beam combining scheme.Experimental results show that,in the phase locked loop system,the output light intensi-ty is very stable,and the efficiency of the combining can be more than 95%.