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A novel low-loss dual-core fiber directional coupler for terahertz raditional is proposed, Coupling properties, loss and group velocity dispersion of the fibers are investigated by the full-vector finite-element method (FEM). The simulation results demonstrate that the coupling length of this coupler is less than 1.8 cm between 1.55 and 1.80 THz, and the coupling broadband of 0.07THz can be realized. And the loss coefficient of the coupler is less than 0.02 cm-1. The directional coupler has potential applications in narrowband filtering, wavelength-division multiplexing, switching, polarization splitter and so on.
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Keywords:
- terahertz /
- dual-core photonic band-gap fiber /
- fiber coupler /
- coupling length
[1] Stoik C D, Bohn M J, Blackshire J L 2008 Opt. Express 16 17039
[2] Han P Y, Cho G C, Zhang X C 2000 Opt. Lett. 25 242
[3] Tielrooij K J, Timmer R L A, Bakker H J, Bonn M 2009 Phys. Rev. Lett. 198303
[4] Moller L, Feserrici J, Sinyukov A 2008 Opt. Lett. 33 393
[5] Danylov A, Goyette T M,Waldman J 2010 Optics Express 18 16264
[6] Hunsche S, Koch M, Brener I 1998 Optics Communications 53 22
[7] Ozaki Y 2007 Analytical Sciences 23 767
[8] Yue W, Wang W, Yan H 2005 Proceedings of the SPIE 56 568
[9] Ma X J, Zhao H W, Dai B, Liu G F 2008 Acta Phys. Sin. 57 3429 (in Chinese) [马晓菁, 赵红卫, 代斌, 刘桂锋 2008 物理学报 57 3429]
[10] Atakaramians S, Afshar V S, Fischer M B 2009 ptics Communications 282 36
[11] Chen H, Chen D, Hong Z 2009 Appl. Opt. 48 3943
[12] Chen D, Tam Y H 2010 Journal of Lightwave Technology 28 1858
[13] Hou Y, Fan F, Zhang H, Wang X H, Chang S J 2012 Photonics Technolgy Letters 24 637
[14] Dupuis A, Allard J-F, Morris D, Stoeffler K, Dubois C, Skorobogatiy M 2009 Opt. Express 17 8012
[15] Nielsen K, Rasmussen H K, Jepsen P U, Bang O 2010 Opt. Lett. 35 2879
[16] Bai J J, Wang C H, Hou Y, Fan F, Chang S J 2012 Acta Phys. Sin. 61 108701 (in Chinese) [白晋军, 王昌辉, 侯宇, 范飞, 常胜江 2012 物理学报 61 108701]
[17] Bora Ung, Anna Mazhorova, Alexandre Dupuis 2011 Opt. Express 19 B848
[18] Wang Z, Kai G, Liu Y, Liu J, Zhang C, Sun T, Wang C, Zhang W, Yuan S, Dong X 2005 Opt. Lett. 30 2542
[19] Saitoh K,Sato Y, Koshiba M 2003 Opt. Express 11 3188
[20] Atakaramians S, Afshar V S, Fischer B M, Abbott D, Monro T M 2008 Opt. Express 16 8845
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[1] Stoik C D, Bohn M J, Blackshire J L 2008 Opt. Express 16 17039
[2] Han P Y, Cho G C, Zhang X C 2000 Opt. Lett. 25 242
[3] Tielrooij K J, Timmer R L A, Bakker H J, Bonn M 2009 Phys. Rev. Lett. 198303
[4] Moller L, Feserrici J, Sinyukov A 2008 Opt. Lett. 33 393
[5] Danylov A, Goyette T M,Waldman J 2010 Optics Express 18 16264
[6] Hunsche S, Koch M, Brener I 1998 Optics Communications 53 22
[7] Ozaki Y 2007 Analytical Sciences 23 767
[8] Yue W, Wang W, Yan H 2005 Proceedings of the SPIE 56 568
[9] Ma X J, Zhao H W, Dai B, Liu G F 2008 Acta Phys. Sin. 57 3429 (in Chinese) [马晓菁, 赵红卫, 代斌, 刘桂锋 2008 物理学报 57 3429]
[10] Atakaramians S, Afshar V S, Fischer M B 2009 ptics Communications 282 36
[11] Chen H, Chen D, Hong Z 2009 Appl. Opt. 48 3943
[12] Chen D, Tam Y H 2010 Journal of Lightwave Technology 28 1858
[13] Hou Y, Fan F, Zhang H, Wang X H, Chang S J 2012 Photonics Technolgy Letters 24 637
[14] Dupuis A, Allard J-F, Morris D, Stoeffler K, Dubois C, Skorobogatiy M 2009 Opt. Express 17 8012
[15] Nielsen K, Rasmussen H K, Jepsen P U, Bang O 2010 Opt. Lett. 35 2879
[16] Bai J J, Wang C H, Hou Y, Fan F, Chang S J 2012 Acta Phys. Sin. 61 108701 (in Chinese) [白晋军, 王昌辉, 侯宇, 范飞, 常胜江 2012 物理学报 61 108701]
[17] Bora Ung, Anna Mazhorova, Alexandre Dupuis 2011 Opt. Express 19 B848
[18] Wang Z, Kai G, Liu Y, Liu J, Zhang C, Sun T, Wang C, Zhang W, Yuan S, Dong X 2005 Opt. Lett. 30 2542
[19] Saitoh K,Sato Y, Koshiba M 2003 Opt. Express 11 3188
[20] Atakaramians S, Afshar V S, Fischer B M, Abbott D, Monro T M 2008 Opt. Express 16 8845
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