Dual resonant peaks of LP <sub>015</sub> claddingmode in long-period gratings
Chester Shu(Fiberhome Technology Group (China)), Li Kuo Zhu(Fiberhome Technology Group (China)), Qinglin Wang(Fiberhome Technology Group (China)), Jiang Jiang(Fiberhome Technology Group (China)), Yun‐Bo Shi(Huazhong University of Science and Technology), Zhijian Huang(Huazhong University of Science and Technology), Zhijian Huang(Huazhong University of Science and Technology)
Cited by 52
Abstract
It is found that the coupling of the guided core mode to a higher order cladding mode may lead to dual resonant wavelengths in long-period gratings (LPGs). The dual peaks of the LP015 cladding mode have been observed to shift towards each other during the second exposure of a 100 µm period grating. It is also shown that the resonant wavelengths of LPGs can be tuned over a wide range by the post-exposure technique.
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