Near-field analysis of misaligned CO2 laser of two-dimension axisymmetric-fold combination cavity
-
摘要: 为了研究小角度失调对二维轴对称-折叠组合腔CO2激光器输出光束的近场分布的影响,在利用矩阵理论确定平凹谐振腔和凹-平-凹谐振腔失调后的光轴的基础上,采用光束并和思想,对输出光束进行了理论分析和模拟.取得的数据表明,小角度失调对4cm以内的近场强度影响不大,光强仍具有高斯状分布;对4cm以外的近场强度影响较大,光强分布轮廓发生相应的变形,且随着失调角度变大而变大.研究结果表明,在4cm以内的近场具有实用价值.Abstract: Under the condition of small angle misalignment,the effecton output beam's near-field distribution of CO2 lasers with two-dimensional axisymmetric-fold combination cavity was ascertained after analyzing and simulating beams combination output based on the axis determination of misaligned plano-concave and concave-plano-concave cavity resonator.The results showed that at small angle misalignment,the effect on near-field within 4cm was un-conspicuous and the light intensity was still at Gaussian distribution,and that out of the 4cm area,the effect became obvious with the misalignment angle.These results showed that the effect on near-field with 4cm was more practically.
-
Keywords:
- lasers /
- axisymmetric-fold combination cavity /
- maladjustment /
- Gaussian beam /
- combination
-
-
[1] XU Q Y,WANG X B.Continuous-wave high power CO2 lasers[M].Beijing:National Defense Industry Press,2000:48-122(in Chinese).
[2] DIETMAR C,VWE H,HEINE-DIETER P.High-power CO2 laser with coaxial waveguide and diffusion cooling[J].IEEE J Q E,1993,29(7):2211-2219.
[3] DIETMAR C,VWE H,HEINE-DIETER P.Ring resonator for laserswith annular gain media[J].Appl Opt,1994,33(30):6919-6924.
[4] DIETMAR C,VWE H,HEINE-DIETER P,et al.Azimuthally unstable resonators for high-power CO2 laser with annular gain media[J].IEEE J Q E,1994,30(6):1440-1447.
[5] ANTONIO L,MARCO C.Extraction of high-quality beams from narrow annular laser sources[J].Appl Opt,1999,38(21):4552-4557.
[6] COLLEY A D,BAKER H J,HALL D R.Planar waveguide 1kW CW carbon dioxide laser excited by a single transverse RF discharge[J].A P L,1993,61(2):136.
[7] WU G L,WANG Y Q,AN Ch W.The analysis of resonators for RF excited diffusion-cooled CO2 planar laser[J].Laser Technology,1998,22(2):121-123(in Chinese).
[8] ZHANG Y Ch.Chinese laser industry last ten years[J].Laser & Infrared,2000,30(3):136-140(in Chinese).
[9] YELDON E F,SEGUIN H J J,CAPIACK C E,et al.Multichannel slab discharge for CO2 laser excitation[J].A P L,1991,85(7):693-695.
[10] YELDEN E F,SCOTT S W,STROHSCHEIN J D,et al.Symmetry enhancement and spot-size reduction through radial beam stacking in a multichannel CO2 laser array[J].IEEE J Q E,1994,30(8):1868-1875.
[11] SEGUIN H J J.Power scaling of diffusion-cooled lasers[J].Opt & Laser Technol,1998,30(9):331-336.
[12] LI Y D,LIU J L,CHEN M,et al.Axisymmetric-fold combination laser resonator[J].Opt Engng,2005,44(6):064204.
[13] LIU J L,LI Y D,GUO J P,et al.Research on near-field distributions of axisymmetric folded-combined CO2 laser[J].Opt Engng,2006,45(7):074201.
[14] LU B D.Laser optics[M].Chengdu:Sichuan University Press,1992:60-65,68-171,335-360(in Chinese).
[15] LU Y X.Variation of misalignment sensitivity of a three-mirror cavity[J].Laser Technology,1991,15(3):154-157(in Chinese).
计量
- 文章访问数: 1
- HTML全文浏览量: 0
- PDF下载量: 7
下载: