红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2013年
6期
1443-1447
,共5页
王雄%王小林%周朴%粟荣涛%耿超%李新阳%许晓军%舒柏宏
王雄%王小林%週樸%粟榮濤%耿超%李新暘%許曉軍%舒柏宏
왕웅%왕소림%주박%속영도%경초%리신양%허효군%서백굉
光纤激光%相干合成%倾斜波前%活塞相位%高速相机
光纖激光%相榦閤成%傾斜波前%活塞相位%高速相機
광섬격광%상간합성%경사파전%활새상위%고속상궤
fiber laser%coherent beam combining%tilt-tip wavefront%piston phase%high-speed camera
光纤激光的相干合成是获得高能量密度、高光束质量激光输出的有效方法之一。在相干合成中,各个单元光束的倾斜波前畸变和活塞相位误差对合成的效果具有重要影响。搭建了两路光纤激光相干合成系统,利用光纤自适应准直器和相位调制器对相干合成中倾斜波前畸变和活塞相位误差进行校正。实验系统以高速相机采集的光斑数据作为评价依据,通过计算机程序进行控制,控制算法为随机并行梯度下降算法。在倾斜和锁相控制前,合成光斑的条纹对比度为0.03,桶中功率为8.03;在倾斜和锁相控制后,合成光斑的条纹对比度达到了0.59,桶中功率达到了32.89,说明实验中倾斜和锁相控制显著提高了相干合成的效果。
光纖激光的相榦閤成是穫得高能量密度、高光束質量激光輸齣的有效方法之一。在相榦閤成中,各箇單元光束的傾斜波前畸變和活塞相位誤差對閤成的效果具有重要影響。搭建瞭兩路光纖激光相榦閤成繫統,利用光纖自適應準直器和相位調製器對相榦閤成中傾斜波前畸變和活塞相位誤差進行校正。實驗繫統以高速相機採集的光斑數據作為評價依據,通過計算機程序進行控製,控製算法為隨機併行梯度下降算法。在傾斜和鎖相控製前,閤成光斑的條紋對比度為0.03,桶中功率為8.03;在傾斜和鎖相控製後,閤成光斑的條紋對比度達到瞭0.59,桶中功率達到瞭32.89,說明實驗中傾斜和鎖相控製顯著提高瞭相榦閤成的效果。
광섬격광적상간합성시획득고능량밀도、고광속질량격광수출적유효방법지일。재상간합성중,각개단원광속적경사파전기변화활새상위오차대합성적효과구유중요영향。탑건료량로광섬격광상간합성계통,이용광섬자괄응준직기화상위조제기대상간합성중경사파전기변화활새상위오차진행교정。실험계통이고속상궤채집적광반수거작위평개의거,통과계산궤정서진행공제,공제산법위수궤병행제도하강산법。재경사화쇄상공제전,합성광반적조문대비도위0.03,통중공솔위8.03;재경사화쇄상공제후,합성광반적조문대비도체도료0.59,통중공솔체도료32.89,설명실험중경사화쇄상공제현저제고료상간합성적효과。
Coherent beam combining of fiber lasers is an very effective way to arrange high energy intensity and high beam quality laser. The tilt-tip wavefront aberrations and phase differences of each beamlet's have significant impacts on coherent beam combining. A coherent beam combining system of two fiber lasers was set up. In the experiment, adaptive fiber optics collimator and phase modulator were introduced to realize tilt-tip and phase control. The metric function came from the laser spot data acquired by high-speed camera, the control method was SPGD algorithm and the whole control was carried out by a computer. The contrast of combined spot is 0.03 and power in bucket is 8.03 before tilt-tip and phase-locking control, after tilt-tip and phase-locking control the contrast is 0.59 and power in bucket is 32.89, which means the control makes obvious improvement in coherent beam combining.