Fig. 1. (a) Intensity distributions of the CAB at the initial plane; (b) phase distributions of the CAB at the initial plane; (c) intensity distributions of the CAB during propagation in the r-z plane.
(a) CAB初始面的光强分布; (b) CAB初始面的相位分布; (c) CAB的侧面光强分布
Fig. 2. Schematic of the laser resonator configuration for CAB generation.谐振腔示意图
Fig. 3. Calculation results of the intensity distributions of the modes by using Fox-Li method with different parameters: (a) r0 = 1 mm, w = 0.2 mm and a = 0.15; (b) r0 = 1.1 mm, w = 0.22 mm and a = 0.17; (c) r0 = 1.2 mm, w = 0.25 mm and a = 0.2.
不同参数条件下, 使用Fox-Li方法计算获得的腔内光场模式分布 (a) r0 = 1 mm, w = 0.2 mm和a = 0.15; (b) r0 = 1.1 mm, w = 0.22 mm和a = 0.17; (c) r0 = 1.2 mm, w = 0.25 mm和a = 0.2
Fig. 4. Radial intensity distributions of the ideal CAB and the beams produced by different methods: (a) r0 = 1 mm, w = 0.2 mm and a = 0.15; (b) r0 = 1.1 mm, w = 0.22 mm and a = 0.17; (c) r0 = 1.2 mm, w = 0.25 mm and a = 0.2.
理想CAB和使用不同方法产生的光束的径向光强分布 (a) r0 = 1 mm, w = 0.2 mm和a = 0.15; (b) r0 = 1.1 mm, w = 0.22 mm和a = 0.17; (c) r0 = 1.2 mm, w = 0.25 mm和a = 0.2
Fig. 5. On-axis intensity contrast of the ideal CAB and the beams produced by different methods: (a) r0 = 1 mm, w = 0.2 mm and a = 0.15; (b) r0 = 1.1 mm, w = 0.22 mm and a = 0.17; (c) r0 = 1.2 mm, w = 0.25 mm and a = 0.2.
理想CAB和使用不同方法产生的光束的光轴光强分布 (a) r0 = 1 mm, w = 0.2 mm和a = 0.15; (b) r0 = 1.1 mm, w = 0.22 mm和a = 0.17; (c) r0 = 1.2 mm, w = 0.25 mm和a = 0.2
Fig. 6. The influence of the alignment errors on formation of the fundamental mode with
,
and
: (a)
and S of the fundamental mode as a function of
; (b)
and S of the fundamental mode as a function of
光束参数为
,
和
时, 系统对准误差对产生光束质量的影响 (a)基模的
以及S与腔长误差
的关系; (b)基模的
以及S与同轴度误差
的关系
Fig. 7. and S of the fundamental mode as a function of
.
基模的
以及S与
的关系
CAB的参数 | 衍射光学元件上的相位分布/rad | $\left| \gamma \right|$![]() ![]() | 光强分布 | r0 = 1 mm
w = 0.2 mm
a = 0.15
| ![]() | 0.9972 | ![]() | 0.9898 | ![]() | 0.9898 | ![]() | r0 = 1.1 mm
w = 0.22 mm
a = 0.17
| ![]() | 0.9970 | ![]() | 0.9845 | ![]() | 0.9845 | ![]() | r0 = 1.2 mm
w = 0.25 mm
a = 0.2
| ![]() | 0.9960 | ![]() | 0.9804 | ![]() | 0.9804 | ![]() |
|
Table 1. The phase distributions of the diffractive optical elements, the three largest
and the calculated intensity distributions of corresponding modes with different parameters.
不同参数条件下的衍射光学元件上的相位分布和计算获得的最大3个
对应模式的光强分布