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Coherent beam combination of Yb-doped fiber laser array is studied theoretically and experimentally by spatial filtering to passive phase locking. The principle of optical feedback phase locking based on spatial filtering is analyzed, and the relations of Strehl ratio in far field to wavelength and spectrum bandwidth are studied. The coherent beam combination of four Yb-doped fiber amplifier array is achieved experimentally, and stable interference pattern is obtained. The Strehl ratio in far field is 0.77. In the output spectrum, the bandwidth of single longitudinal mode is about 9.1 GHz consistent with the theoretical calculation.
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Keywords:
- fiber laser /
- coherent beam combination /
- ring cavity
[1] McNaught S J, Komine H, Weiss S B, Simpson R, Johnson A M, Machan J, Asman C P, Weber M, Jones G C, Valley M M, Jankevics A, Burchman D, McClellan M, Sollee J, Marmo J, Injeyan H 2009 Conference on Lasers and Electro-Optics Baltimore, USA, May 31, 2009 CThA1
[2] Sevian A, Andrusyak O, Ciapurin I, Smirnov V, Venus G, Glebov L 2008 Optics Letters 33 384
[3] Zhou P, Liu Z J, Wang X L, Ma Y X, Ma H T, Xu X J 2009 Appl. Phys. Lett. 94 231106-1
[4] Wang J M, Duan K L,Wang Y S 2008 Acta Phys. Sin. 57 5627(in Chinese)[王建明、段开椋、王屹山 2008 57 5627]
[5] Lei B, Feng Y, Liu Z J 2008 Acta Phys. Sin. 57 6419(in Chinese)[雷 兵、冯 莹、刘泽金 2008 57 6419]
[6] Chen Z L, Hou J, Zhou P, Liu L, Jiang Z F 2007 Acta Phys. Sin. 56 7046(in Chinese)[陈子伦、侯 静、周 朴、刘 亮、姜 宗福 2007 56 7046] 〖7] Anderegg J, Brosnan S, Cheung E, Epp P, Hammons D, Komine H, Weber M, Wickham M 2006 Proc. SPIE San Jose, USA, January 23, 2006 61020U-1
[7] Bruesselbach H, Minden M, Rogers J L, Jones D C, Mangir M S 2005 Conference on Lasers and Electro-Optics Baltimore, America, May 22, 2005 CMDD4
[8] He B, Lou Q H, Zhou J, Dong J X, Wei Y R, Wang Z J 2006 Acta Optica Sinica 26 1279(in Chinese)[何兵、楼祺洪、周军、董景星、魏运荣、王之江2006 光学学报 26 1279]
[9] He B, Lou Q H, Zhou J, Dong J X, Wei Y R, Xue D, Qi Y F, Su Z P, Li L B, Zhang F P 2006 Optics Express 14 2721
[10] He B, Lou Q H, Wang W, Zhou J, Zheng Y H, Dong J X, Wei Y R, Chen W B 2008 Appl. Phys. Lett. 92 251115-1
[11] Rothenberg J E 2008 Proc. SPIE San Jose, USA, January 21,2008 687315-1
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[1] McNaught S J, Komine H, Weiss S B, Simpson R, Johnson A M, Machan J, Asman C P, Weber M, Jones G C, Valley M M, Jankevics A, Burchman D, McClellan M, Sollee J, Marmo J, Injeyan H 2009 Conference on Lasers and Electro-Optics Baltimore, USA, May 31, 2009 CThA1
[2] Sevian A, Andrusyak O, Ciapurin I, Smirnov V, Venus G, Glebov L 2008 Optics Letters 33 384
[3] Zhou P, Liu Z J, Wang X L, Ma Y X, Ma H T, Xu X J 2009 Appl. Phys. Lett. 94 231106-1
[4] Wang J M, Duan K L,Wang Y S 2008 Acta Phys. Sin. 57 5627(in Chinese)[王建明、段开椋、王屹山 2008 57 5627]
[5] Lei B, Feng Y, Liu Z J 2008 Acta Phys. Sin. 57 6419(in Chinese)[雷 兵、冯 莹、刘泽金 2008 57 6419]
[6] Chen Z L, Hou J, Zhou P, Liu L, Jiang Z F 2007 Acta Phys. Sin. 56 7046(in Chinese)[陈子伦、侯 静、周 朴、刘 亮、姜 宗福 2007 56 7046] 〖7] Anderegg J, Brosnan S, Cheung E, Epp P, Hammons D, Komine H, Weber M, Wickham M 2006 Proc. SPIE San Jose, USA, January 23, 2006 61020U-1
[7] Bruesselbach H, Minden M, Rogers J L, Jones D C, Mangir M S 2005 Conference on Lasers and Electro-Optics Baltimore, America, May 22, 2005 CMDD4
[8] He B, Lou Q H, Zhou J, Dong J X, Wei Y R, Wang Z J 2006 Acta Optica Sinica 26 1279(in Chinese)[何兵、楼祺洪、周军、董景星、魏运荣、王之江2006 光学学报 26 1279]
[9] He B, Lou Q H, Zhou J, Dong J X, Wei Y R, Xue D, Qi Y F, Su Z P, Li L B, Zhang F P 2006 Optics Express 14 2721
[10] He B, Lou Q H, Wang W, Zhou J, Zheng Y H, Dong J X, Wei Y R, Chen W B 2008 Appl. Phys. Lett. 92 251115-1
[11] Rothenberg J E 2008 Proc. SPIE San Jose, USA, January 21,2008 687315-1
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