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The characteristics of Q-switched Nd:YAG laser induced damage to fused optical fibers has been investigated experimentally. A scheme of laser induced damage to optical fiber in a vacuum chamber was presented and carried out.With this scheme, the air pressures on the input face of optical fiber was reduced to 10—100 Pa, laser-induced breakdown on the optical fiber end face was significantly suppressed, the breakdown threshold increased to 185 times that in the atmosphere. The damage morphology of optical fiber end face was analyzed, which was the result of the combined actions of laser pulses standing wave and ablation. The existence of a large number of defects on or under the fiber end face reduces the anti-laser-induced damage ability of the optical fibers. Under the vacuum condition, another damage mode——the fiber “entry” segment damage occurred. This “entry” segment damage mode occurred at 5—30 mm distances from the input end face of optical fiber, the blasting damage area was 1—3 mm long along the fiber core axis. That the initial reflection of laser beam at the interface of fiber cladding and core causes laser focusing which induced the entry damage, was proved by theory and simulations.
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Keywords:
- laser damage /
- laser beam delivery /
- vacuum /
- silica optical fiber
[1] ［1］Allison S W, Gillies G T, Magnuson D W, Pagano T S 1985 Appl. Opt. 24 3140
[2] ［2］Richou B, Schertz I, Gobin I, Richou J 1997 Appl. Opt. 36 1610
[3] ［3］Zhao X H, Gao Y, Xu M J, Duan W T, Yu H W 2007 Proc. SPIE 6825 683516
[4] ［4］Setchell R E 1997 Proc. SPIE 2966 608
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[7] ［7］Yang Y N, Yang B, Zhu J R, Shen Z H, Lu J, Ni X W 2007 2 Acta Phys. Sin. 56 5945 (in Chinese) ［杨雁南、杨波、朱金荣、沈中华、陆建、倪晓武 2007 56 5945］
[8] ［8］Zhao X H, Gao Y, Xu M J, Duan W T, Zhao X, Yu H W 2007 High Power Laser and Particle Beams 19 1627 (in Chinese) ［赵兴海、高杨、徐美健、段文涛、赵翔、於海武 2007 强激光与粒子束 19 1627］
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[11] ］Yuan G, Zhou G Q 1988 Chin. J. High Pressure Phys. 2 182(in Chinese) ［袁钢、周光泉 1988 高压 2 182］
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[13] ］Hu J P, Zhang W H, Duan L H, Ma P, Xu Q 2006 Opt. Optoelect. Technol. 4 49 (in Chinese) ［胡建平、张问辉、段利华、马平、许乔 2006 光学与光电技术 4 49］
[14] ］Zhao X H, Gao Y 2008 Acta Photon. Sin. 37 1842 (in Chinese) ［赵兴海、高杨 2008 光子学报 37 1842］
[15] ］Hu P, Chen F L 2005 High Power Laser and Particle Beams 17 961 (in Chinese)［胡鹏、陈发良 2005 强激光与粒子束 17 961］
[16] ］Bloembergen N 1973 Appl. Opt. 12 661
[17] ］Xu S X, Li X S, Zhang G X 1994 Chin. J. Lasers A 21 645 (in Chinese) ［徐世祥、李锡善、张国轩 1994 中国激光 A 21 645］
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[1] ［1］Allison S W, Gillies G T, Magnuson D W, Pagano T S 1985 Appl. Opt. 24 3140
[2] ［2］Richou B, Schertz I, Gobin I, Richou J 1997 Appl. Opt. 36 1610
[3] ［3］Zhao X H, Gao Y, Xu M J, Duan W T, Yu H W 2007 Proc. SPIE 6825 683516
[4] ［4］Setchell R E 1997 Proc. SPIE 2966 608
[5] ［5］Setchell R E 1992 Proc. SPIE 1624 56
[6] ［6］Zhao X H, Gao Y, Xu M J, Duan W T, Yu H W 2008 Acta Phys. Sin. 57 5027 (in Chinese) ［赵兴海、高杨、徐美健、段文涛、於海武 2008 57 5027］
[7] ［7］Yang Y N, Yang B, Zhu J R, Shen Z H, Lu J, Ni X W 2007 2 Acta Phys. Sin. 56 5945 (in Chinese) ［杨雁南、杨波、朱金荣、沈中华、陆建、倪晓武 2007 56 5945］
[8] ［8］Zhao X H, Gao Y, Xu M J, Duan W T, Zhao X, Yu H W 2007 High Power Laser and Particle Beams 19 1627 (in Chinese) ［赵兴海、高杨、徐美健、段文涛、赵翔、於海武 2007 强激光与粒子束 19 1627］
[9] ［9］Bergman B 1998 Mater. Sci. Lett. 3 689
[10] ］Sato S, Ashida H, Arai T, Shi Y W, Matsuura Y, Miyagi M 2000 Opt. Lett. 25 49
[11] ］Yuan G, Zhou G Q 1988 Chin. J. High Pressure Phys. 2 182(in Chinese) ［袁钢、周光泉 1988 高压 2 182］
[12] ］Man B Y, Miao Y, Guo X X, Wang X T, Zhuo Z 1997 Chin. 2 Sci. Bull. 42 997 (in Chinese) ［满宝元、苗勇、郭向欣、王象泰、卓壮 1997 科学通报 42 997］
[13] ］Hu J P, Zhang W H, Duan L H, Ma P, Xu Q 2006 Opt. Optoelect. Technol. 4 49 (in Chinese) ［胡建平、张问辉、段利华、马平、许乔 2006 光学与光电技术 4 49］
[14] ］Zhao X H, Gao Y 2008 Acta Photon. Sin. 37 1842 (in Chinese) ［赵兴海、高杨 2008 光子学报 37 1842］
[15] ］Hu P, Chen F L 2005 High Power Laser and Particle Beams 17 961 (in Chinese)［胡鹏、陈发良 2005 强激光与粒子束 17 961］
[16] ］Bloembergen N 1973 Appl. Opt. 12 661
[17] ］Xu S X, Li X S, Zhang G X 1994 Chin. J. Lasers A 21 645 (in Chinese) ［徐世祥、李锡善、张国轩 1994 中国激光 A 21 645］
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