Acousto-optic-induced cladding-mode reflection in a blazed-superstructure fiber grating |
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Authors: | Ming-Yue Fu Wen-Fung Liu Tzu-Chiang Chen Hao-Jan Sheng |
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Affiliation: | Dept. of Electr. Eng., Nat. Defense Univ., Taoyuan, Taiwan; |
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Abstract: | The coupling phenomenon between the cladding mode and the core mode in a blazed-superstructure fiber grating is experimentally demonstrated in this letter by applying both transverse and longitudinal acoustic waves. This is based on the difference between the cladding-mode wave vector and the core-mode wave vector, which is equivalent to the acoustic wave vector. By this means, a reflectivity-tunable multiwavelength switchable comb filter would be developed for the applications in fiber optics. |
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