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基于扫描滤波原理, 提出了一种新的用以提升啁啾脉冲激光信噪比(signal-to-noise, SNR)的光学扫描滤波方法. 针对内置电光晶体的Fabry-Perot标准具的扫描滤波方案, 定量分析了其扫描滤波谱特性, 详细讨论了Fabry-Perot标准具平行平板的镜面反射率和内置电光晶体类型对输出脉冲信噪比的影响, 并进一步探讨了控制电压变化对信噪比提升效果的影响. 结果表明, 扫描滤波器的透射窗口带宽越窄, 信噪比的提升效果越好; 为了保证输出效果, Fabry-Perot标准具平行平板反射率应大于0.9; 对于内置二次电光晶体钽铌酸钾晶体的Fabry-Perot标准具扫描滤波方案, 其外加电压较内置普通线性电光晶体的方案更低, 且更易于控制; 钽铌酸钾晶体构成组分的不同对滤波器效果的影响并不大, 而控制电压和信号光啁啾率的变化则会对滤波效果产生较大影响.Based on the principle of scanning filtering, a new optical scanning filtering method for improving signal-to-noise ratio(SNR) of the chirped pulse is proposed. For the scanning filtering scheme of Fabry-Perot (F-P) etalon including an electro-optic crystal, the spectral characteristics of the scanning filter are analyzed quantitatively. Furthermore, the effects of the reflectivity of the parallel-plates of F-P etalon and the types of the electro-optic crystals on the output SNR are discussed in detail, and the influence of the variation of the controlling voltage applied to the electro-optic crystal on the filtering effect is also studied. The results show that the narrower the bandwidth of scanning filter transmission window is, the better the improved SNR will be. In order to ensure the filtering effect, the reflectivity of the parallel-plates of F-P etalon should be more than 0.9. Compared with the scheme of scanning filter built-in ordinary linear electro-optic crystal, the scheme of F-P etalon including an secondary standard electro-optic crystal, i.e., KTa1-xNbxO3 crystal, requires a low voltage, and it is easy to control. The differences of KTa1-xNbxO3 crystal components have little influence on the filtering effect, whereas the variations of controlling voltage and chirp rate of the signal exhibit a greater influence on the filtering effect.
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Keywords:
- chirped pulse laser /
- SNR /
- scan filtering /
- F-P etalons
[1] Strickland D, Mourou G 1985 Opt. Commun. 56 219
[2] Bahk S W, Rousseau P, Planchon T A, Chvykov V, Kalintchenko G, Maksimchuk A, Mourou G A, Yanovsky V 2004 Opt. Lett. 29 2837
[3] Yoshida H, Ishii E, Kodama R, Fujita H, Kitagawa Y, Izawa Y, Yamanaka T 2003 Opt. Lett. 28 257
[4] Beaudoin Y, Chien C Y, Coe J S, Tapié J L, Mourou G 1992 Opt. Lett. 17 865
[5] Yamakawa K, Shiraga H, Kato Y, Barty C P J 1991 Opt. Lett. 16 1593
[6] Kiriyama H, Mori M, Nakai Y, Shimomura T, Tanoue M, Akutsu A, Kondo S, Kanazawa S, Okada H, Motomura T, Daido H, Kimura T, Tajima T 2008 Opt. Lett. 33 645
[7] Hong K H, Hou B, Nees J A, Power E, Mourou G A 2005 Appl. Phys. B-Lasers O 81 447
[8] Jullien A, Albert O, Burgy F, Hamoniaux G, Rousseau J P, Chambaret J P, Augé-Rochereau F, Chériaux G, Etchepare J, Minkovski N, Saltiel S M 2005 Opt. Lett. 30 920
[9] Chvykov V, Rousseau P, Reed S, Kalinchenko G, Yanovsky V 2006 Opt. Lett. 31 1456
[10] Jullien A, Kourtev S, Albert O, Chériaux G, Etchepare J, Minkovski N, Saltiel S M 2006 Appl. Phys. B-Lasers O 84 409
[11] Dubietis A, Butkus R, Piskarskas A P 2006 IEEE J. Sel. Top. Quantum Electron. 12 163
[12] Liu H J, Chen G F, Zhao W, Wang Y S, Zhao S H 2004 Acta Phys. Sin. 53 1717 (in Chinese) [刘红军, 陈国夫, 赵卫, 王屹山, 赵尚弘 2004 53 1717]
[13] Zeng S G, Zhang B 2009 Acta Phys. Sin. 58 2476 (in Chinese) [曾曙光, 张彬 2009 58 2476]
[14] Scheel H J, Sommerauer J 1983 J. Cryst. Growth 62 291
[15] Agrawal G P 2001 Nonlinear Fiber Optics 3nd ed (Boston: Academic Press) p69
[16] Liu C, Wang Z H, Li C W, Liu F, Wei Z Y 2010 Acta Phys. Sin. 59 7036 (in Chinese) [刘成m, 王兆华, 李伟昌, 刘峰, 魏志义 2010 59 7036]
[17] Wang Y H, Pan X, Wang J F, Wang L, Li X C, Lin Z Q 2009 Acta Optics Sin. 29 980 (in Chinese) [王艳海, 潘雪, 王江峰, 王利, 李学春, 林尊琪 2009 光学学报 29 980]
[18] Zhang F L, Ouyang X P, Xie X L, Yang Q W, Guo A L, Sun M Z, Lin Z Q 2009 Chinese J. Lasers 36 1171 (in Chinese) [张福领, 欧阳小平, 谢兴龙, 杨庆伟, 郭爱林, 孙美智, 林尊琪 2009 中国激光 36 1171]
[19] Ross I N, Matousek P, Towrie M, Langley A J, Collier J L 1997 Opt. Commun. 144 125
[20] Nakamura K, Miyazu J, Sasaura M, Fujiura K 2006 Appl. Phys. Lett. 89 131115
[21] Wang X P 2008 Ph. D. Dissertation (Jinan: Shandong University) (in Chinese) [王旭平 2008 博士学位论文 (济南: 山东大学)]
[22] Yuan J Q, Xie W P, Zhou L J, Chen L, Wang X X 2008 High Power Laser and Particle Beams 20 171 (in Chinese) [袁建强, 谢卫平, 周良骥, 陈林, 王新新 2008 强激光与粒子束 20 171]
[23] Zhu Y X 2009 Ph. D. Dissertation (Changsha: National University of Defense Technology) (in Chinese) [朱永祥 2009 博士学位论文 (长沙: 国防科学技术大学)]
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[1] Strickland D, Mourou G 1985 Opt. Commun. 56 219
[2] Bahk S W, Rousseau P, Planchon T A, Chvykov V, Kalintchenko G, Maksimchuk A, Mourou G A, Yanovsky V 2004 Opt. Lett. 29 2837
[3] Yoshida H, Ishii E, Kodama R, Fujita H, Kitagawa Y, Izawa Y, Yamanaka T 2003 Opt. Lett. 28 257
[4] Beaudoin Y, Chien C Y, Coe J S, Tapié J L, Mourou G 1992 Opt. Lett. 17 865
[5] Yamakawa K, Shiraga H, Kato Y, Barty C P J 1991 Opt. Lett. 16 1593
[6] Kiriyama H, Mori M, Nakai Y, Shimomura T, Tanoue M, Akutsu A, Kondo S, Kanazawa S, Okada H, Motomura T, Daido H, Kimura T, Tajima T 2008 Opt. Lett. 33 645
[7] Hong K H, Hou B, Nees J A, Power E, Mourou G A 2005 Appl. Phys. B-Lasers O 81 447
[8] Jullien A, Albert O, Burgy F, Hamoniaux G, Rousseau J P, Chambaret J P, Augé-Rochereau F, Chériaux G, Etchepare J, Minkovski N, Saltiel S M 2005 Opt. Lett. 30 920
[9] Chvykov V, Rousseau P, Reed S, Kalinchenko G, Yanovsky V 2006 Opt. Lett. 31 1456
[10] Jullien A, Kourtev S, Albert O, Chériaux G, Etchepare J, Minkovski N, Saltiel S M 2006 Appl. Phys. B-Lasers O 84 409
[11] Dubietis A, Butkus R, Piskarskas A P 2006 IEEE J. Sel. Top. Quantum Electron. 12 163
[12] Liu H J, Chen G F, Zhao W, Wang Y S, Zhao S H 2004 Acta Phys. Sin. 53 1717 (in Chinese) [刘红军, 陈国夫, 赵卫, 王屹山, 赵尚弘 2004 53 1717]
[13] Zeng S G, Zhang B 2009 Acta Phys. Sin. 58 2476 (in Chinese) [曾曙光, 张彬 2009 58 2476]
[14] Scheel H J, Sommerauer J 1983 J. Cryst. Growth 62 291
[15] Agrawal G P 2001 Nonlinear Fiber Optics 3nd ed (Boston: Academic Press) p69
[16] Liu C, Wang Z H, Li C W, Liu F, Wei Z Y 2010 Acta Phys. Sin. 59 7036 (in Chinese) [刘成m, 王兆华, 李伟昌, 刘峰, 魏志义 2010 59 7036]
[17] Wang Y H, Pan X, Wang J F, Wang L, Li X C, Lin Z Q 2009 Acta Optics Sin. 29 980 (in Chinese) [王艳海, 潘雪, 王江峰, 王利, 李学春, 林尊琪 2009 光学学报 29 980]
[18] Zhang F L, Ouyang X P, Xie X L, Yang Q W, Guo A L, Sun M Z, Lin Z Q 2009 Chinese J. Lasers 36 1171 (in Chinese) [张福领, 欧阳小平, 谢兴龙, 杨庆伟, 郭爱林, 孙美智, 林尊琪 2009 中国激光 36 1171]
[19] Ross I N, Matousek P, Towrie M, Langley A J, Collier J L 1997 Opt. Commun. 144 125
[20] Nakamura K, Miyazu J, Sasaura M, Fujiura K 2006 Appl. Phys. Lett. 89 131115
[21] Wang X P 2008 Ph. D. Dissertation (Jinan: Shandong University) (in Chinese) [王旭平 2008 博士学位论文 (济南: 山东大学)]
[22] Yuan J Q, Xie W P, Zhou L J, Chen L, Wang X X 2008 High Power Laser and Particle Beams 20 171 (in Chinese) [袁建强, 谢卫平, 周良骥, 陈林, 王新新 2008 强激光与粒子束 20 171]
[23] Zhu Y X 2009 Ph. D. Dissertation (Changsha: National University of Defense Technology) (in Chinese) [朱永祥 2009 博士学位论文 (长沙: 国防科学技术大学)]
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