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Modal interferometer based on tapering single-mode-multimode-single-mode fiber structure by hydrogen flame 被引量:1

Modal interferometer based on tapering single-mode-multimode-single-mode fiber structure by hydrogen flame
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摘要 A modal interferometer is experimentally demonstrated based on tapering a single-mode-multimode-single- mode (SMS) fiber structure heated by hydrogen flame. The interference fringe begins to form when tapering length is 19.8 mm, and becomes regular and clear when the tapering length is longer and the tapered waist diameter is smaller. Annealing process is undertaken to achieve a high extension ratio of approximately 17 dB with free spectral range of 1.5 nm when the tapering length is 33 mm and the tapered waist diameter is approximately 5 μm. The temperature and axial strain dependences of the tapered SMS structure are characterized, and the measured temperature and strain coefficients are +7 pm/℃ and -9.536 pm/με, respectively. A modal interferometer is experimentally demonstrated based on tapering a single-mode-multimode-single- mode (SMS) fiber structure heated by hydrogen flame. The interference fringe begins to form when tapering length is 19.8 mm, and becomes regular and clear when the tapering length is longer and the tapered waist diameter is smaller. Annealing process is undertaken to achieve a high extension ratio of approximately 17 dB with free spectral range of 1.5 nm when the tapering length is 33 mm and the tapered waist diameter is approximately 5 μm. The temperature and axial strain dependences of the tapered SMS structure are characterized, and the measured temperature and strain coefficients are +7 pm/℃ and -9.536 pm/με, respectively.
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2012年第7期34-36,共3页 中国光学快报(英文版)
基金 supported in part by the National "973" Program of China(No.2011CB301700) the National Natural Science Foundation of China(Nos.61007052, 61071011,61107041,61127016) the International Cooperation Project from the Ministry of Science and Technology of China(No.2011FDA11780) the STCSM Project(Nos.09JC1408100,10DJ1400402) the "SMC Young Star" Scientist Program of Shanghai Jiao Tong University the National Key Lab Projects(No. GKZD030021)
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