Chin. Phys. Lett.  2008, Vol. 25 Issue (1): 160-163    DOI:
Original Articles |
Bragg Gratings Written in Photonic Crystal Fibres with a High-Index Germanosilicate Core
JIN Long1;GUAN Bai-Ou2;FANG Qiang1;WANG Zhi1;LIU Bo1;LIU Jian-Guo1;YUE Yang1;KAI Gui-Yun1;DONG Xiao-Yi1
1Key Laboratory of Opto-Electronic Information Science and Technology (Ministry of Education), Institute of Modern Optics, Nankai University, Tianjin 3000712School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024
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JIN Long, GUAN Bai-Ou, FANG Qiang et al  2008 Chin. Phys. Lett. 25 160-163
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Abstract Bragg gratings are straightforwardly written into a 10-ring photonic crystal fibre (PCF) with a highly Ge3+-doped core by means of a 193nm ArF excimer laser. The grating inscription efficiency is improved, due to enhanced
photosensitivity and the large overlap between the fundamental mode and the photosensitive core. The exposure duration only lasts less than 180s. In addition, the high-index core changes the modal properties of the PCF and two groups of higher order mode resonance dips are therefore obtained. A strong cladding mode resonance is observed, because the LP02-like mode has a large overlap integral with the fundamental mode.
Keywords: 42.81.Bm      42.81.Dp      42.79.Gn     
Received: 02 July 2007      Published: 27 December 2007
PACS:  42.81.Bm (Fabrication, cladding, and splicing)  
  42.81.Dp (Propagation, scattering, and losses; solitons)  
  42.79.Gn (Optical waveguides and couplers)  
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JIN Long
GUAN Bai-Ou
FANG Qiang
WANG Zhi
LIU Bo
LIU Jian-Guo
YUE Yang
KAI Gui-Yun
DONG Xiao-Yi
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