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从小尺度热晕线性理论出发，在non-Kolmogorov谱的基础上，得到了non-Kolmogorov谱湍流下热晕相位补偿的Strehl比表达式，分析了湍流谱对高能激光的相位补偿的影响.研究结果表明湍流谱对湍流热晕效应的相位补偿有重要的影响.在相同的湍流菲涅耳数下，当谱指数越接近于3时补偿效果越差，谱指数接近于4时补偿效果越好.在相同大气相干长度条件下或在相同湍流折射率常量条件下，当谱指数接近于3时，Strehl比随热晕效应的增强而下降变快，当湍流谱指数逐渐接近于4时，Strehl比下降速度变慢.其原因是随着湍流谱指数的增大，湍流热晕相互作用引起的对数振幅起伏增长变慢.High energy laser beams propagating in the atmosphere are subjected to a variety of effects, such as the absorption and scattering of molecule and aerosol, atmospheric turbulence effects, thermal blooming effects, and the interaction between turbulence and thermal blooming. In general, these atmospheric propagation effects degrade laser beam quality and reduce the beam power concentration at the target. With adaptive optics compensation, the beam quality can be modified. But small-scale perturbation has developed and the phase compensation becomes unstable in some conditions. The performance of adaptive-optics system is degraded, which effects can be well explained by small-scale linear theory of thermal blooming. However previous theoretical studies of small-scale thermal blooming focused on the Kolmogorov turbulence. In the past decade, experimental evidence has shown significant deviations from Kolmogorov model in certain portions of the atmosphere. An generalized power-law of non-Kolmogorov turbulence model has been introduced, which becomes quite popular in the optical propagation community. Numerous theoretical and developmental efforts have been made based on non-Kolmogorov turbulence model in recent years. Thus it is very meaningful and imperative to explore the theoretical mechanism of high energy laser phase compensation with non-Kolmogorov turbulence.In this study, the Strehl ratio of the thermal blooming phase compensation is generalized with the non-Kolmogorov turbulence spectrum, and the analytical expression is obtained based on the linear theory of small-scale thermal blooming. The influence of the turbulence spectrum on the phase compensation of the high energy laser is analyzed. The results show that the turbulence spectrum has an important influence on the phase compensation of turbulent thermal blooming effect. Under the same turbulence Fresnel number condition, the compensation effect is worse when the spectral index is closer to 3 and the compensation effect is better when the spectral index is close to 4. Under the same atmospheric coherence length condition or under the same turbulence refractive index constant condition, the Strehl ratio decreases with the increase of the thermal blooming effect when the spectral index is close to 3 and the decline rate of the Strehl ratio is slower when the turbulence spectrum index is close to 4. This is because as the turbulence spectrum exponent increases, the logarithmic amplitude fluctuation slows down due to the interaction between turbulence and thermal blooming. These theoretical results can provide some scientific bases and theoretical guidance for the practical applications of high energy laser transmission.
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Keywords:
- high-energy laser /
- thermal blooming effect /
- phase compensation /
- small scale thermal blooming instability
[1] Chambers D H, Karr T J, Morris J R, Cramer P, Viecelli J A, Gautesen A K 1990 Proc. SPIE 1221 83
[2] Chambers D H, Viecelli J A, Karr T J 1990 Proc. SPIE 1221 220
[3] Karr T J 1990 Proc. SPIE 1221 26
[4] Karr T J 1989 J. Opt. Soc. Am. A 6 1038
[5] Briggs R J 1987 Lawrence Livermore National Lab. Technical Report UCID-21118
[6] Karr T J 1991 Appl. Opt. 30 363
[7] Karr T J, Morris J R, Chambers D H, Viecelli J A, Cramer P G 1990 J. Opt. Soc. Am. B 7 1103
[8] Karr T J, Rushford M C, Murray J R, Morris J R 1991 J. Opt. Soc. Am B 8 993
[9] Johnson B, Schonfeld J F 1991 Opt. Lett. 16 1258
[10] Johnson B, Primmerman C A 1989 Opt. Lett. 14 639
[11] Higgs C, Fouche D G, Pearson C F 1992 Proc. SPIE 1628 210
[12] Xue B, Cui L, Xue W, Bai X, Zhou F 2011 J. Opt. Soc. Am. A 28 912
[13] Cui L Y, Xue B D, Cao X G, Dong J K, Wang J N 2010 Opt. Express 18 21269
[14] Pérez L D G, Zunino L 2008 Opt. Lett. 33 572
[15] Tan L, Du W, Ma J, Yu S, Han Q 2010 Opt. Express 18 451
[16] Shan X, Liu M, Zhang N 2017 Opt. Eng. 56 026111
[17] Zhou Y, Yuan Y, Qu J, Huang W 2016 Opt. Express 24 10682
[18] Yan X, Zhang P F, Zhang J H, Qiao C H, Fan C Y 2016 Chin. Phys. B 25 84204
[19] Huang Y, Wang F, Gao Z, Zhang B 2015 Opt. Express 23 1088
[20] Wang Y J 1996 Ph. D. Dissertation (Hefei: Anhui Institute of Opitcs and Fine Mechanics, Chinese Academy of Sciences) (in Chinese) [王英俭 1996 博士学位论文(合肥: 中国科学院安徽光学精密机械研究所)]
[21] Enguehard S, Hatfield B 2004 Proc. SPIE 5552 41
[22] Enguehard S, Hatfield B 1994 J. Opt. Soc. Am. A 11 908
[23] Enguehard S, Hatfield B 1991 Proc. SPIE 1408 178
[24] Enguehard S, Hatfield B 1991 J. Opt. Soc. Am. A 8 637
[25] Enguehard S, Hatfield B 1991 Proc. SPIE 1415 128
[26] Andrews L C, Phillips R L 2005 Laser Beam Propagation through Random Media (Berllingham: SPIE) pp74-85
[27] Lukin V P, Fortes B V 2002 Adaptive Beaming and Imaging in the Turbulence Atmosphere (Berllingham: SPIE) pp15-20
[28] Toselli I, Andrews L C, Phillips R L, Ferrero V 2007 Proc. SPIE 6551 65510E
[29] Tang H, Ou B, Luo B, Guo H, Dang A 2011 J. Opt. Soc. Am. A 28 1016
[30] Zhou P, Ma Y, Wang X, Zhao H, Liu Z 2010 Opt. Lett. 35 1043
[31] Beland R R 1995 Proc. SPIE 2375 6
[32] Stribling B E, Welsh B M, Roggemann M C 1995 Proc. SPIE 2471 181
[33] Enguehard S, Hatfield B 1995 Prog. Quant. Electron. 19 239
[34] Tyson R K 1982 Appl. Opt. 21 787
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[1] Chambers D H, Karr T J, Morris J R, Cramer P, Viecelli J A, Gautesen A K 1990 Proc. SPIE 1221 83
[2] Chambers D H, Viecelli J A, Karr T J 1990 Proc. SPIE 1221 220
[3] Karr T J 1990 Proc. SPIE 1221 26
[4] Karr T J 1989 J. Opt. Soc. Am. A 6 1038
[5] Briggs R J 1987 Lawrence Livermore National Lab. Technical Report UCID-21118
[6] Karr T J 1991 Appl. Opt. 30 363
[7] Karr T J, Morris J R, Chambers D H, Viecelli J A, Cramer P G 1990 J. Opt. Soc. Am. B 7 1103
[8] Karr T J, Rushford M C, Murray J R, Morris J R 1991 J. Opt. Soc. Am B 8 993
[9] Johnson B, Schonfeld J F 1991 Opt. Lett. 16 1258
[10] Johnson B, Primmerman C A 1989 Opt. Lett. 14 639
[11] Higgs C, Fouche D G, Pearson C F 1992 Proc. SPIE 1628 210
[12] Xue B, Cui L, Xue W, Bai X, Zhou F 2011 J. Opt. Soc. Am. A 28 912
[13] Cui L Y, Xue B D, Cao X G, Dong J K, Wang J N 2010 Opt. Express 18 21269
[14] Pérez L D G, Zunino L 2008 Opt. Lett. 33 572
[15] Tan L, Du W, Ma J, Yu S, Han Q 2010 Opt. Express 18 451
[16] Shan X, Liu M, Zhang N 2017 Opt. Eng. 56 026111
[17] Zhou Y, Yuan Y, Qu J, Huang W 2016 Opt. Express 24 10682
[18] Yan X, Zhang P F, Zhang J H, Qiao C H, Fan C Y 2016 Chin. Phys. B 25 84204
[19] Huang Y, Wang F, Gao Z, Zhang B 2015 Opt. Express 23 1088
[20] Wang Y J 1996 Ph. D. Dissertation (Hefei: Anhui Institute of Opitcs and Fine Mechanics, Chinese Academy of Sciences) (in Chinese) [王英俭 1996 博士学位论文(合肥: 中国科学院安徽光学精密机械研究所)]
[21] Enguehard S, Hatfield B 2004 Proc. SPIE 5552 41
[22] Enguehard S, Hatfield B 1994 J. Opt. Soc. Am. A 11 908
[23] Enguehard S, Hatfield B 1991 Proc. SPIE 1408 178
[24] Enguehard S, Hatfield B 1991 J. Opt. Soc. Am. A 8 637
[25] Enguehard S, Hatfield B 1991 Proc. SPIE 1415 128
[26] Andrews L C, Phillips R L 2005 Laser Beam Propagation through Random Media (Berllingham: SPIE) pp74-85
[27] Lukin V P, Fortes B V 2002 Adaptive Beaming and Imaging in the Turbulence Atmosphere (Berllingham: SPIE) pp15-20
[28] Toselli I, Andrews L C, Phillips R L, Ferrero V 2007 Proc. SPIE 6551 65510E
[29] Tang H, Ou B, Luo B, Guo H, Dang A 2011 J. Opt. Soc. Am. A 28 1016
[30] Zhou P, Ma Y, Wang X, Zhao H, Liu Z 2010 Opt. Lett. 35 1043
[31] Beland R R 1995 Proc. SPIE 2375 6
[32] Stribling B E, Welsh B M, Roggemann M C 1995 Proc. SPIE 2471 181
[33] Enguehard S, Hatfield B 1995 Prog. Quant. Electron. 19 239
[34] Tyson R K 1982 Appl. Opt. 21 787
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